Saturday 22 January 2011

A Fresh Start


  NEW PLANS FOR 2011

 The beginning of January is the perfect time to look back over the previous year and analyze your gardening activities so that you can learn from your failures, build on your successes and plan new ventures. This applies to both my gardening activities as well as my painting projects.
Of course we are always at the mercy of our unpredictable weather and climate change brought on by global warming seems to be giving us a more extreme climate. New weather records get broken at a more frequent rate, whether it is the warmest summer, coldest day, the highest rainfall, or the heaviest snowfall.
Keeping in touch with weather forecasts is more important than ever before so we can plan seed sowing, planting, weed control and soil cultivations at the best times. It is even more important to make sure any spraying for pest, disease or weed control is done when a few days dry weather is forecast. There is nothing more infuriating than to have completed crop spraying then see it all washed off a few hours later. Last year was a very difficult year for spraying as the rain was never very far away.
The garden and allotment have never been subject to routine. There are so many new and improved plants to try, and ones that were previous favourites have gone out of favour if they have not been able to cope with a wetter climate. However I may be making a wrong assumption. Just because we have had four wet years and two severe winters in a row does not mean you can expect this to be a pattern. Prior to this we have had years of mild winters with hardly any snow, 2006 was a heatwave and my memory from childhood records seeing the first winter snows every year in November
However, it is great fun to experiment, so although I have tried many grape varieties outdoors in Dundee and discarded most of them, I will still continue with other varieties. Our climate may well get warmer and drier again and maybe I just have to find the right variety for Scottish conditions.

Paintings

With winter starting at the end of November, gardening has been put on hold till the snow melts and pruning and digging can continue. However the winter landscapes have been brilliant for painting ideas, so I have been going through the phase of planning art projects for the year ahead. The recession has had a big impact on art sales in the middle price bracket, but less so for smaller paintings. There is also a trend towards simpler images on unframed large stretched box canvases. So projects are being planned for a series of watercolour winter landscapes with minimalistic images, and some contemporary figure studies on large box canvases.
Now that could keep me occupied till next autumn unless of course we get a great summer and I will find it hard to choose between the spade, the hoe, the trowel or the paintbrush.

Flowers

The wet years have really sorted out the roses. Climber Golden Showers was always very reliable as was shrub rose L D Braithwaite, a gorgeous deep red, but they just could not withstand attacks of blackspot disease. Spraying with Dithane was not effective with the continual rain. They and many others have been dug out. The climber has been replaced with shrub rose Graham Thomas which is much stronger and will be trained as a climber.
I have a lot of very steep banks around the house where access to cultivate is a problem, despite a fair bit of terracing so these will be planted with drift of Fuchsia Mrs. Popple, Shasta daisies and some flag iris. This permanent planting will help to stabilize the bank.
Some of the bank was bedded out with spray chrysanthemums last year. I am hoping that these will survive the winter outdoors and grow again this year as a drift, of close planted stems that will not need any attention. Time will tell.

Vegetable Crops
Most vegetables cropped very well last year resulting in gluts of the usual courgettes, cabbages, lettuce, beans and sweet corn.
This year I must grow a wider range of crops and less of each as I am only feeding two people.
Although last year was a bit too wet for onions, I grew a Sweet Spanish Yellow variety from seed.
It was late, but produced an excellent crop that stores very well. I still have plenty firm onions left. I will grow that one again this year but must sow it a bit earlier.
Another success to be repeated this year was a super sweet type of sweet corn, and Swiss Chard Bright Lights has been very prolific, so I do not need so much, especially as we use a lot of Kale leaves in stir fries, and that is just as healthy.
With brassicas both cabbage Golden Acre for summer and Traviata, a savoy for winter will be grown again as well as Brussels Sprouts Wellington.
In the greenhouse it is hard to get a better tomato than Alicante for a large fruit full of flavor and my favourite cherry type is Sweet Million though the seed is expensive and not supplied in large quantities. Do not sneeze when sowing that one.

Fruit Crops

I grow just about every fruit available for eating fresh in season, in jams, compotes all year round, puddings, scones, pies, crumbles, smoothies and juices. It is very important to make sure selected varieties are the best for our local climate and soil. I have not always got it right, so there are many changes to be made this year.
I have several apple trees that provide eating apples from August till mid winter from those in store.
However,  I have too much Arbroath Pippin, (the Oslin) which is very early but does not keep so some branches will be changed to new varieties by grafting this spring.
Pears have the same problem as I have a large Comice tree that gets wiped out by scab in any wet year. Grafting will also be done to replace some of it. I will retain some Comice just in case we go back to warm dry summers again, as there is nothing to beat Comice in a good year.

Raspberry Glen Ample suffered a terminal root rot disease slowly killing the row over several years. The symptoms indicate it could be phytophthora. This fungus disease is spread in soil water so could be a problem if drainage is poor, or during prolonged periods of wet weather. I suspect the disease came in on infected new raspberry canes. There are several strains of phytophthora, some being quite specific to one plant host whereas others can attack a wider range of plants. I must have the latter as I also lost a white currant, and a gooseberry and some blaeberries also got infected. These were growing beside the raspberries, but lower down the slope. Different strains of this disease causes potato blight, sudden oak death and many other plant diseases.
I have replaced the raspberries with a new variety called Cascade Delight bred at Washington University and selected for tolerance to root rot. Hopefully the new canes planted last year will give me some crop this year. I will be sorry to lose my Glen Ample as it is an excellent variety.
I will also replace the white currant but will choose a different location.

I planted a new perpetual strawberry, Malling Opal last year, but it did not make a lot of growth so I will need to assess its performance this summer. It was replacing another perpetual, Flamenco which stopped producing runners, then died out. Perpetuals help to extend the strawberry season into the autumn without any protection.

Last year I tried another superfood fruit called the Chokeberry. Botanically, it is known as Aronia melanocarpa and the popular variety in Viking. The fruit can be a wee bit astringent if eaten fresh. Even the birds leave it alone till the end of summer, but it makes a terrific jam, compote, a deep red wine, and a very healthy smoothie. The berries are almost black and very high in vitamin C and antioxidants. The Aronia has one of the highest levels of anthocyanins of all known plants. The health benefits of aronias are being studied by food scientists. I have a batch of these sown in a tray and hope to have some plants by summer.

I now await delivery of a new cherry tree on the very dwarfing Gisela 5 rootstock, as well as a new grape vine called Solaris which I will try outdoors on a south facing fence, and hopefully I will see some white seedless grapes from a new vine, Perlette planted last year in the greenhouse.

End

Wednesday 12 January 2011

Winter Pruning of Fruit Trees

  WINTER PRUNING FRUIT TREES AND BUSHES

 The dormant season from November to March is the perfect time to tackle the winter pruning with   pruning saw, loppers and secateurs. Other garden tasks have been put on hold while we wait on better weather once all the snow melts, but pruning is mostly above ground level so deep snow and frost are no obstacle as long as you have warm clothing and the promise of some hot pumpkin or beetroot soup once the job is complete.
Pruning fruit trees and bushes has always been seen as a skill beyond most amateur gardeners and only acquired after good training and years of practice. Even in professional circles I have found great gardeners who never did break down the mystery of pruning. One expert propagator highly regarded for his skills in raising plants never got his gooseberry bushes to bear any fruit.
In reality the principles of pruning are similar for all fruit production although each type has its own needs.

I try to keep my pruning very simple and may not follow the book. I leave that to those undergoing training, who have to follow the Royal Horticultural Society precise methods so they understand the principles and get through their exams.
Then there is the commercial growers who wish to produce quality fruit with high yields, but with the minimum of labour input and aimed at producing trees that can all be picked from the ground.
My methods combine RHS principles applied with a simplified version of commercial practice.
My first aim is to produce a strong well shaped tree or bush, then prune lightly to encourage a balance of fruiting wood and replacement shoots. These must be well spaced to allow light into the tree to ripen up young wood so it can initiate fruit buds.
Pruning also removes weak growth, diseased shoots, crossing branches, branches broken with heavy crops or just too near the ground.

Apples and Pears
 
Pruning method varies depending on whether the trees are bush, cordon, espalier, stepover or fan trained. All of these can be spur pruned by summer and winter pruning. Cut back all side shoots to five or six leaves in mid summer, then again back to two buds in winter to encourage formation of fruiting spurs. In time reduce the size of these spurs otherwise you may get too many fruits at the expense of size.
Leading main shoots are reduced by a third in winter.
My apple and pears are grown as bushes so I do not spur prune them. I carry out replacement pruning of fruiting branches which have got too old and bent down with heavy cropping. This is done with loppers and saw, not secateurs, and I always look for a young shoot to replace the branch being removed.
If the tree becomes too vigorous, I do not feed in spring, but at the end of August. This feed is too late to encourage fresh growth so the tree uses it to build up fruit buds. Late pruning once spring growth has just started will also help to curb an over vigorous tree.

Plums

These are always pruned in summer to minimize the risk of Silver leaf disease. The spores of this disease are around from late autumn to late spring and could penetrate any cut surface.
Form a well balanced tree with five or six main branches in the early years. Plums tend to crop heavy and pull limbs down, so replacement pruning is perfect for them. There is usually plenty of young shoots to replace any limbs removed. Replacement pruning is carried out as required and not necessarily every year.

Peaches

These are usually fan trained against a warm south facing wall or fence, so pruning is carried out to keep the tree in this shape, and allow ample sunlight onto the ripening fruit. Fans have four main branches on each side. These are constantly being replaced by young shoots that are allowed to grow for one year producing new fruit buds that overwinter to make the following years crop. To allow sunlight into the centre of the tree remove all unfruitful shoots in late winter and during summer prune out weak growth, upright shoots and any showing signs of disease. Remove some foliage around the fruit in summer to help colour up the fruit.

Raspberries

Summer fruiting types fruit on canes produced the previous year. These are removed after cropping or in winter and the new shoots tied in. If the variety produces a lot of canes thin these out so that canes are spaced out at four inches apart tied along the top wire with a running knot.
Autumn fruiting types are cut down to ground level every winter as they fruit on new canes.

Blackberry (Bramble)

These are similar to summer fruiting rasps but the canes grow a lot bigger so have to be tied in to a wire framework where they are looped up and down to save space. Train the new canes up the centre and above the fruiting canes to keep them out of the way.
Tayberry and Loganberry is pruned the same way.

Blackcurrants

Immediately after planting cut the new bush down to a couple of buds on each shoot. These prunings can be used as hardwood cuttings to grow into more bushes. Blackcurrants fruit on one year old shoots and older wood. Prune after fruiting or in winter by cutting some older branches down to ground level or to a young shoot coming from near the base. Aim to replace all growth over about four or five years.

Red and White currants

These can be grown as a bush or a cordon as they fruit best on spurs. Allow the bush to form an open centre with about six main shoots. In early summer cut all side shoots to about six inches then in winter further reduce these to two buds. After a few years start to replace one or two main shoots every year with new young shoots.

Gooseberries

These fruit very easily as long as bullfinches don’t go pecking out the buds in spring. Pruning is mainly to make picking easier, so keep the centre open and also remove any low trailing shoots otherwise soil could splash the fruits. Remove any crossing shoots and overcrowded areas.

Saskatoons and Blueberries

Saskatoon  fruit bushes produce berries on all wood, so pruning is only carried out after several years to keep the plant down to an easy height for picking. Every year remove a branch down to ground level to encourage new sucker growth to keep the bushes young.
Blueberries also require little pruning for the first few years as they are quite slow growing. In later years cut some older branches down to younger shoots coming from the base or lower down the plant to rejuvenate the bush.

Grape vines

In Scotland these are either grown under glass or on a sheltered south facing warm wall. Under glass grow them on single upright rods spaced about eighteen inches apart and in winter cut every shoot back to one or two buds of the main rod. Shoots emerge from these spurs and form small fruit bunches. Allow these to grow then prune them to two leaves after the bunch. Then for the rest of the growing period cut all other growths to one leaf. In early autumn thin out more shoots and leaves to let sunshine ripen the fruit. Pruning wall trained vines outdoors is just the same, though grow them on a well spaced framework of main branches rather than rods.

 End

Tuesday 4 January 2011

Orchids


  ORCHIDS AT HOME

 Orchids came to Britain over a hundred years ago as plant explorers brought back new exotic plants from every continent to grow in Britain. They were very rare at first and difficult to grow but demand was huge as having orchids became a status symbol of the wealthy.  Collectors went in search of new orchids as imported plants could be auctioned for very high prices as orchidmania swept the country.
In my training years, orchids were quite rare as no-one had any and I did not know anyone who had them. I could only read about them in magazines and gardening books.
My first sight of an orchid was on a camping trip in the sixties up Glen Nevis. I saw this very unusual small flower spike at the side of the footpath. The plant had yellow spotted leaves just like I had seen in books. I was quite excited at discovering my first orchid, and although it may not have been very exotic, it was growing wild in Scotland. Further up the glen I was amazed to find more of them growing in massive drifts all over the place. Fortunately I had my Kodak Brownie with this new colour film so I could record my find.
Many years later while working in Livingston I found that wild orchids are quite common and enjoy boggy land in areas of high rainfall. A lot of Livingston was built on peat boglands. I had been asked to estimate a price for weed control around this new factory where weeds had started to encroach into the paved areas. I couldn’t believe what I found, as it was my spotted orchid trying hard to survive after someone had planted an industrial estate on its natural habitat. There were hundreds of them, and all in full flower. It was a beautiful sight, though soon to be very short lived. A team of men in white suits and face masks arrived with sprayers as nothing could stop progress.
Have they no soul!!!
Today the mystery of orchids has somewhat disappeared as easy to grow types, e.g. phalaenopsis and Cymbidiums are now available in every garden centre and books abound with stories and growing instructions for the beginner.

Habitat

Orchids grow in almost every country around the world so there is tremendous variety. Breeders can enhance species and hybrids to produce plants suited to domestic cultivation and environments.
There are many types native to UK, though these grow in the ground preferring damp areas and boggy ground though they often grow on banks above wet areas so the roots are not in standing water. These types are known as terrestrial but the common ones we see flowering in garden centres are mostly epiphytic in origin.
These do not grow in soil, but cling to tree trunks and branches in tropical forests where there is high humidity. They have clinging roots which hold the plant in place and aerial roots which hang below the plant and absorb moisture from the air as the root surface has a blotting paper ability.
They do not draw on their host plant for nutrients but are happy with nutrients washed down in bird droppings, rainwater with atmospheric nitrogen and small amounts of leafmould produced by natural falling leaves.
The woodland canopy, mostly evergreen, affords dappled light and protection from strong sunlight. As orchids come from all over the world there are those that are happy with our temperatures and others that need a bit more warmth.

Culture

When you purchase your first orchid I would always recommend starting with one of the easier ones such as the Phalaenopsis which are usually quite reliable and very rewarding when it repeats the flowering every year. They will come in pots with ample holes for drainage and planted in special orchid compost. This is often a mixture of bark chips, coarse graded peat, charcoal to keep the mixture sweet, nutrients and trace elements. This should be sufficient to keep the plant happy for two to four years before repotting is necessary depending on type. It is best to repot in spring as growth commences.
Plants can continue in flower for a few weeks, then occasionally some may send up another flower spike from lower down on the existing spike. Once flowering is over allow the plant some dormancy. Keep it in a cooler spot, and water less often, but do not let it dry out. Do not feed at this stage or repot. Never leave the plant in standing water as they all require free draining compost.
Place the plants in a well lit room, but out of any direct sunlight. I have a strong white phalaenopsis that just loves our bright bathroom where daily showers provide it with high humidity. If growing it in a living room, give the occasional light spray to the leaves and wipe off any dust.
Orchids are not heavy feeders so just give them an orchid feed once every two to four weeks while they are growing.
Orchids have thick leathery leaves that are not too troubled with pests or diseases.

Propagation

It is often easier to buy new plants rather than propagate from an existing plant. Commercially many orchids are produced by specialist growers using meristem culture producing many plants in selected clones.
Orchids may grow as a single stem from a rhizome and sometimes produce basal offshoots that can be separated for growing on once they have produced their own roots. Others that produce many pseudobulbs, or swollen stems, or just many flat stems may be split up and repotted. Sometimes it is difficult to get them out of their pots as the roots cling onto the insides of the pot. Before potting up, remove any broken, diseased or dead roots, and make sure there is plenty of drainage in the bottom of the pot before adding orchid compost. Repot into the nearest size for the plant as they prefer to be rootbound before they settle down to flower. Do not put the aerial roots into the pot when potting up.
Although orchids may produce seed, it is not easy to grow as each type requires a symbiotic relationship with its own species of mycorrhiza. Breeders use a special growth medium in sterile flasks for their seeds then bulk up using meristem culture.

Phalaenopsis

These have been extensively bred and crossed and are now available in many colours. Although they are fairly easy to grow they enjoy plenty of warmth and in winter can take direct sunlight for a few months, but keep them shaded from spring onwards.
They can flower most of the year with six or up to twenty or more flowers on one spike. Keep the stem staked otherwise it hangs over and could pull over the whole plant. They are very popular as cut flower in North America.

Cymbidiums

Cymbidiums are very popular and another good one to start with as they are very adaptable. They flower in autumn to spring producing many spikes with up to twenty flowers each lasting up to ten weeks. The plants can grow quite large and are happy in a cool room. They require more frequent repotting because of their strong growth. Again, these are excellent for long lasting cut flower.

Paphiopedilums

These orchids are terrestrial, not epiphytic so there are no aerial roots or pseudobulbs. They grow from rhizomes just below ground level and produce medium sized flower stems with just one or a few flowers. They like to be kept lightly shaded. Propagate by division in spring and repot every second year in the smallest pot available.

Cattleyas

These epiphytes are very flamboyant with large colourful flowers which are often highly perfumed.

There are many orchid societies throughout Scotland and the UK and every year the World Orchid Congress puts on a fantastic show. This year it is in Singapore on 14 to 23 November 2011.

 End

Tuesday 28 December 2010

A Year to Remember


 A DIFFICULT YEAR ENDS

 Looking back over 2010 I have to admit it has been an uphill struggle for many garden plants.
The year started with a winter to remember as we had not really had a decent winter for many years previous. As a painter of Scottish landscapes specializing in winter scenes I was always looking out for a good snow scene. Often I would rush out with my camera to capture as much as possible before it all melted by mid afternoon. Last winter there was so much snow that access to outdoor landscapes was severely limited due to blocked roads.
Back in the garden the early snowdrops were getting used to flowering in early February, but not this year. They were loath to appear by March, then there was a rush as crocus, aconites and Hellebores all came out together.
The low temperatures really gave many plants a fright. Outdoor fuchsias all died except Mrs Popple, Hebe’s died, Lithospermum Red Damask did not survive and my mature thirty foot tall Eucalyptus lost half of its leaves. I had a strong date palm in a flower bed near a warm south facing wall, but it died back to ground level.
On the plus side my outdoor Peach was very late in flowering, much so it missed any late frosts. It produced plenty of pink flowers which kept me busy each day pollinating them with my best watercolour sable brush. I got twelve very large fruits of a very high quality in mid summer.

A Wet Summer

Many Scots might feel a wee bit of global warming could improve our climate. The garden would be bursting with colour and fresh succulent fruit and vegetables.
If the temperatures are a little bit warmer, I can’t say it has been very noticeable this year as the continual rain has dampened down any beneficial effects. I am now looking back as we are well and truly locked into another severe winter weather period. If this is global warming, why is the cold weather breaking all previous records?  Will Fuchsia Mrs Popple survive into 2011 ?
Plants are very adaptable. My flower bed of geraniums took every opportunity each time we had a few days of sunshine in between the deluges to give a fantastic display of bright colour. Begonias were late but very dependable, especially those put into tubs. Gladioli, chrysanthemums and roses all put on great displays, but roses suffered from black spot, rust and mildew late in the season.

Soft Fruit Crops

Following the very hot summer of 2006 we have suffered four very wet years. My normally very dependable raspberry Glen Ample got infected by a root rot which I suspect was a strain of Phytophthora. Over three years the canes slowly died out and no fresh canes emerged. My allotment garden is on a slope and immediately south of my rasps other fruit bushes began to go yellow and die. These included a white currant, a gooseberry, two  Saskatoons and some cultivated blueberries I had been experimenting with. My autumn fruited raspberry, Autumn Bliss was unaffected and still produced a normal crop. However with so much rain and lack of sunshine the fruits were not as sweet as normal.
The Glen Ample was replaced with another raspberry called Cascade Delight. This is a summer fruiting variety bred at Washington State University and showing some tolerance to phytophthora root rot. It has large fruit with an excellent flavour, which I hope to sample next year.
The cool wet summer also delayed ripening of my Saskatoon fruit which cropped for over three weeks, whereas in the previous year they only lasted one week.
Strawberries were badly affected by botrytis rotting the fruits. Modern varieties have resistance built into the plant, but this was an exceptionally wet year. I had replaced my perpetual strawberry variety Flamenco with a new one called Malling Opal. It has not been happy with our wet season and I will see if it fairs better next year. Perpetuals fruit all summer long so it is nice to have fruit into late autumn, but it is difficult to propagate this variety as they do not produce many runners. Flamenco did produce ample runners and these produced fruit immediately.
Both blackcurrants and red currants cropped very heavily this year so no change for them next year.
Saskatoon fruit ripened over a far longer period but the quality was still very good I may do a wee bit pruning, taking one or two main shoots down to ground level to encourage fresh new shoots which will fruit for the next five years.
Goji berry plant is still growing but no sign of any flowers or fruits. Maybe next year.
Outdoor trials of grape varieties have not been successful. They did produce bunches of grapes, but they just would not ripen in our wet year. I will try another variety called Solaris for next year.
However my outdoor variety Brant was exceptional. The bunches are small, but quality is great with over one hundred bunches of sweet black juicy grapes.
I have persisted with our local Bramble Loch Ness, but it is hopeless in our wet years, so it got grubbed out. The fruit was small, tasteless and very prone to botrytis. My other bramble Helen which fruits in August is still hard to beat.

Top Fruits

Pears were a disaster this year. Comice may be a fantastic pear when conditions are right, but it is so prone to scab in a wet year that I cannot recommend it unless our climate takes a turn towards a drier regime. I was very impressed with the variety Beurre Hardy which I got at Glendoick Garden Centre Apple Weekend last October. I kept the fruit for two weeks when it ripened beautifully. This variety is quite strong and resists scab infections. Conference is also very good and scab tolerant, but it is very hard to get anything to compete with Comice.  Some Comice will get grafted with another variety next year.
I worried about my plum tree as although it flowered very late the cold weather had reduced the insect population drastically and I only ever saw two bees on the tree throughout its flowering period. However they done a great job and the tree developed a full crop. Normally I would have been ecstatic as a fully ripe Victoria plum is an absolute delight, but lack of sun and too much rain resulted in a soggy fruit lacking flavour and sweetness. A lot of the fruit got left on the tree.
Now the apple crop was very different as I no longer grow weak varieties prone to scab. The early variety Oslin gave too much crop as it does not store so has to be eaten when ripe.  Some shoots will get grafted next spring with another variety. Discovery and Red Devil were brilliant, but Red Falstaff has not stored well this year, so half of them are going out as winter food for our blackbirds.
I have always fancied growing sweet cherries and now that growers are using the new very dwarfing Gisela 5 rootstock it will be easy to net the tree from birds as it only grows to six feet or so. This one is on my lists for planting next year.

 Allotment vegetables

A mixed year depending on how tolerant plants were in a high rainfall year. Courgettes and pumpkins were excellent. No lanterns for us at Halloween, we need them for soup to last till next summer. I also save the seed every year as I have an excellent strain.
Onions were very poor with ripening up very difficult. Most other vegetable crops grew very well in our wet summer and now we still have excellent savoy cabbage Traviata, Sweet flavoured Brussels sprouts Wellington and plenty of Musselburgh Leeks. My beetroot still in the ground under a foot of snow is still perfect

The Greenhouse

There was just enough sun to ripen my grapes and my Black Hamburg has been very sweet. I look forward to 2011 and getting some grapes from my new white seedless vine Perlette.
Tomatoes ripened very late and quality was not up to usual standard, but maybe next year will be drier with more sun.
Plans are being considered to take a stand at both Gardening Scotland at Ingliston and the Dundee Flower and Food Festival next year as demand for my saskatoon plants and grape vines is still very strong.
Now let us get out that bottle of Glenfarclas and raise a toast in the hope that next year the laws of average will prevail and 2011 will be exceptionally warm and dry and my next packet of parsnip seeds will produce more than three plants.
Cheers !!!

 End