ORCHIDS
Orchids once held the
reputation of being expensive to buy and difficult to grow as these exotics
were not native to our climate. Plant collectors and breeders have now
introduced us to a massive array of orchids that most folk can try out with varying
degrees of success. I have grown these both for the impact of large beautiful
flowers, but also as a subject for numerous orchid paintings. Many of my art
class students also like to paint these exotic flowers from their own plants. John has many orchid paintings available for sale from his studio with details on his website www.johnstoa.com
Cattleya orchid |
Habitat
There are many types of
orchid native to Scotland, though these grow in the ground preferring damp
areas and banks just above boggy ground 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 coming from rain forests in
tropical environments.
Pink phalaenopsis |
These cling to tree
trunks and branches where there is high humidity. They roots hold the plant in
place and aerial roots which hang below the plant and absorb moisture from the
air. They do not draw on their host plant for nutrients but rain with
atmospheric nitrogen washes nutrients down in bird droppings, and small amounts
of leafmould produced by natural falling leaves.
Culture
Phalaenopsis are
usually quite reliable and very rewarding with repeat flowering every year from
autumn through winter. 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. Repot in spring after two to four years as growth commences. Once
flowering is over allow the plant some dormancy. Keep it in a cooler spot with
good light but not in full sun, 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.
Phalaenopsis orchid |
Orchids are not heavy
feeders so just give them an orchid feed once every two to four weeks.
Propagation
Orchids sometimes produce
basal offshoots that can be separated for growing on once they have produced
their own roots. Others can produce many pseudobulbs, or swollen stems which
can be split up and repotted. 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.
Phalaenopsis are now a very popular pot plant and one of the easiest orchids to grow
with long racemes of large flowers lasting for many months. They are fine on a
sunny windowsill in Scotland from autumn till spring, but then give them a more
shady position for summer.
Cymbidium Ormoulu |
Cymbidiums flower in autumn to spring
producing many spikes with up to twenty flowers each lasting for months. The
plants can grow quite large and are happy in a cool room.
Paphiopedilums 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 are very flamboyant with large colourful flowers which are often highly
perfumed.
Wee jobs to do this week
John carving the pumpkin in March |
Pumpkins in storage
need checking, but can keep till end of March in a good year. We still have
three left so this one getting cut up for the pot is still in a perfect
condition at the end of February.
Anna will roast some
of these slices with nutmeg, honey and butter for tonight’s supper. The rest
will get roasted, and then skin removed before bagging up for the freezer.
Later on they will be used for soup, risotto, pumpkin pie and as a vegetable
with a bit of seasoning. Even with young grandchildren visiting there’s just no
chance these will end up as lanterns.
END