Saturday, 24 March 2007

IVY IN TREES




I sort of believe that ivy does no harm when it is left to grow up healthy trees and might even benefit them because of the diversity of insect and animal life that live in them. I was talking to a man on a donkey recently. He seemed to think that my theory about ivy is some way responsible for the apparent epidemic that has hit the trees in the Inishowen countryside (his tongue was firmly in his cheek I might add). I think he might have a point though. His theory is that the ivy not only grows up the trunk of the tree, it travels along the horizontal branches. The more the ivy spreads up the branches, the harder it is for the tree to produce leaves for itself. The reduced foliage on the tree means that it doesn’t get energy from the sun. This results in a weakened tree that will inevitably suffer a premature death. By the end of the conversation with the man on a donkey I think we came up with a suitable compromise. By all means grow ivy up trees. Trim the ivy back every year so the plant stays on the main bark before it encroaches onto the side branches. This way it will behave itself.


Horticultural.

SPRING TALK


SWILLY GARDENING CLUB

Last Monday saw the first evening of the Swilly Gardening Club in Buncrana. I went along to listen to John Toland from Limavady, talk about spring flowers in the garden. He brought his slide projector and over 100 pictures of his beautiful, 1/3-acre garden. John used to be a traditional gardener but things changed for him about 10 years ago after he joined the Alpine Society. Being involved in the worldwide organisation has turned John into a bit of a specialist in the subject of alpines and he is starting to win competitions around the country showing some rare and unusual specimens. John is now always on the lookout for collectable alpine plants and all of these go straight into his garden.
He particularly likes to collect primulas and some of his favourites were bred in Northern Ireland. The Boyne Valley primula and the Red Paddy come from Newry. Older varieties have been traced back to the 14th and 15th century when herbalists used to use them in medicines. The biggest problem that John faces when growing these plants outside is that vine weevil and leatherjackets love to eat the roots. When this happens, the plant just blows away. Blackbirds are a bit of a nuisance too as they sometimes pick the flowers off his plants the day before a show. It sounded impressive when he told us that he has 26 different types of snowdrops in his garden, but he dismissed this as very little, as there are over 600 types in the snowdrop family.
All these plants like our climate and can cope with the wet ground but for the alpines John makes special beds and rockeries. The soil for these has to be very free draining and contain lots of sand. His plants were all protected from the soil surface by a layer of grit and John keeps the beds clean of debris (such as fallen leaves and twigs) to reduce the chance of the plants rotting. Most of the work is done in spring and he leaves the summer for relaxing, (wise man).
When it comes to propagating any of the rare plants he has, he gives them all the same treatment. He is a big believer that the seed should be fresh as then the germination rate is much higher. As the plants produce seed he puts them straight into pots with a 50/50 mix of sand and soil. Labels are then put on and the pots are covered lightly with grit. These are then left outside in a sheltered spot where nature does the rest. This idea does away with the need for a greenhouse. Sometimes he has to be really patient as a few varieties of seed take about three years to germinate. At times he has had to wait five years! As a backdrop to some of the beds John uses early flowering plants such as Aquilegia, Thalictrum and Rhododendrons. To increase the stock of Rhododendrons he pins the bottom branches to the ground after putting a nick in the stem that touches the ground. In a few months the cutting has rooted and can be cut away from the parent plant.

MAKE AN ALPINE PLANTER
John had a very memorable alpine planter in his garden. Every so often a terracotta pot gets broken and instead of throwing it away he collects the pieces and creates a planter. It doesn’t really matter what size the pots are as you judge the amount of plants according to the size of pot. Fill the base of pot with a 50/50 sand soil mix then add the broken pieces of the pot and plant around them. You can get pleasing results by planting in other containers as well. Try planting in an old shoe or old pieces of wood. Anything goes as long as there is good drainage. Choose the plants carefully though and pick ones that will grow happily together as some alpines are very invasive once they get going and could swamp the other slower growing varieties. Most alpines take very easily from either cuttings or division if you want to increase your stock. It doesn’t really matter if they have flowers on them either, just pich them off.

Horticultural.

WILDLIFE HEDGE

Q.I want to create a wildlife hedge of Hawthorne and Holly. I have a large boundary and wondered if I could grow the plants from the seed of nearby trees.

A. Growing these plants from seed is a good idea but you will need plenty of patience, as they will take a while to establish. Remove the fleshy part of the fruit and mash them up. Put the goo into a bowl and you will find that the seeds will drop to the bottom, making them easy to collect. You can put the seed in the fridge for a few weeks, mixed with three times their volume of course sand. But an easier way is to let nature do the work for you. Put the seed into pots and label them. Put them outside in a sheltered spot and put wire mesh over the top to stop rodents digging them up. Keep an eye on them making sure they don’t get too wet or dry. If you want to get going sooner then you could buy small whips of the plants for under a Euro, which would still make for a low cost hedge.

Horicultural.

CITRUS PEEL



Q. Is citrus fruit peel recommended for general composting (not worm bins)? M.McC via E-mail


A. I think that citrus fruit peel is O.K. in small amounts in the compost bin. I tend to put too much in at one go and the worms crawl into the lid to get away from them. I tend to put peel into a paper bag or place them near the fire to dry them out. The peel has natural paraffin in them and they make great firelighters.


Horticultural.

LEADING TREE BRANCHES

SHARED LEADERSHIP
When you are choosing trees make sure they have just one leading branch. A young tree can cope well with two or more leaders but as time goes by they will have problems. The branches will be vulnerable to splitting in windy weather. If you do have a young tree with a couple of main upright branches then one can be cut away. This will allow the remaining branch to go it alone and produce a fine specimen. It’s a good time to look out for the branches now before the leaves come. Don’t worry if the tree looks a bit one-sided for a couple of years after cutting, it will rectify itself soon enough.


Horticultural.

SPRING COLOUR

Photo: Winter flowering Jasmine.



Photo: Daffs at Loreto House,Linsfort.



There’s not much room for any introductory chat this week as things are hotting up in the garden and there’s such a lot to do. If you still think it’s a bit chilly to be out tending your plot you could always plant up a couple of containers to brighten up the doorways of the house. There’s lots of spring colour in the garden centres at the moment.


GET MORE FROM YOUR DAFFODILS
Daffodils are at their best when in large numbers. Fortunately for us, daffodils are very obliging when it comes to dividing their bulbs. The only things that stop a bulb from multiplying are lack of space and nutrients. The bulbs are very busy underground and one of them can form a large clump in a few years given the right conditions. When the flowers begin to fade, dig up and take off the sister bulbs. You might get three or four out of every one. Plant them back into the ground straight away and water them in. Do this every year and you’ll soon have your own daffodil business!

THE FLOWER GARDEN

Winter Jasmine will be making an appearance now. After the flowers have gone, prune the climber back. Cut away any old wood and thin the spindly stems. Tie in fresh shoots onto the supports.

Penstemons can be tidied up and cut back. Be careful not to tread on the new shoots coming up.
Prepare the soil where hardy annuals are going to be sown during March and April.


Plant lily bulbs now for flowering in summer. Choose a free draining spot in full sun and add extra grit to the hole just to be on the safe side. There are a lot of miniature lilies on the market and these would do very well in pots.

Divide clumps of snowdrops now because when the leaves die back you wont be able to find them.

Horticultural.

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