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Archive for the ‘Information’ Category

Improving fruit size and quality

Monday, July 5th, 2010

There is nothing more satisfying than picking and eating your own home grown fruit straight from the tree.  It’s tempting to allow a heavy crop. This can result in smaller fruit and a risk of having little or no fruit at all every other year.

It is common to see a number of small fruits on the floor at this time of year. This is mainly because your fruit trees have their own way of dealing with excessive fruit by producing a hormone that results in self thinning. This is normal in apples, plums, pears, peaches and cherries and is known as the ‘June drop‘.

As a result remaining fruit gets more light and has space to grow. It also prevents excessive weight on the branches, which might cause them to break.

Wait until the natural June drop has occurred before deciding whether to perform any additional deliberate thinning.

When you do, start by removing what is known as the king fruit. This is found at the centre of the cluster and is recognizable by a characteristic misshape, the fruit developing with a thickening to one side of the stalk.


After removing this (where possible) aim to thin to a maximum of four fruits in a cluster of Cox for example, perhaps leaving only three for larger fruiting varieties such as Bramley.

At this time of year (aim to do this before mid July) fruits are easily dislodged with a flicking motion. Do not agonise over selection, just look to create space. Where stubborn fruits occur just leave these, choosing weaker neighbours in each cluster instead.

Apart from improving size and shape in this year’s crop, you should also find the act of thinning contributes to regular cropping year on year. Leaving fruits on the tree in the hope of a heavy crop this year could result in much lighter crop the following year (or even no fruit development at all).

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Tree of the week Salix alba Britzensis Scarlet Willow

Saturday, February 20th, 2010

Salix alba Britzensis, the scarlet willow, is one of the best large, upright willows with coloured bark. Despite its common name it is more orange than scarlet, the strong colour glows throughout winter, seeming to intensify as spring approaches.

Sometimes wrongly listed as Chermesina, which is a similar, though different clone of Salix alba, white willow,  Britzensis is a male variety raised from seed in the 1870s by Spath, a German nursery at Britz near Berlin, hence the name. Its showy catkins are large and yellow.

Like any willow grown for the ornamental quality of its bark, it should be hard-pruned each or every alternate spring to encourage brightly coloured new growth. Old trees can be rejuvenated by pollarding (being cut at 6 to 8ft or so above ground level), which will also stimulate the production of new coloured twigs.

Ultimately, when left to grow on it can make a 70ft tree with a conical shape, the high canopy of coloured twigs sway in the wind and look spectacular when seen lit-up by low angled winter sun against dark rain clouds.

Comments and questions are always welcome.

Simon

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What is the first sign of spring?

Wednesday, February 3rd, 2010

For many people the first sign that spring is on the way is the sight of the first blossom on trees.  Many wonder which tree it is that blossoms so early. It can often appear in hedgerows or scrubby corners and be confused with the native hedgerow shrub Blackthorn, Prunus spinosa.

It is in fact Prunus cerasifera, also known as the Cherry plum or Myrobalan  which is a species of plum native to central and Eastern Europe, southwest and central Asia, though the true wild species may be Prunus divaricata.

It is a large shrub or small tree reaching 6-15 m tall, with deciduous leaves 4-6 cm long. It is one of the first European trees to flower in spring, often starting in mid February; the flowers are white, 1.5-2 cm across, with five petals. The fruit is a drupe 2-3 cm in diameter and yellow or red colour; it is edible, and reaches maturity from early-July to mid-September.

Purple leaved plumThe reason it is so common may be because it is a standard root stock for most fruiting plums.  When the top of a plum tree dies, sprouts arise from the root and take the place of the original tree.

The commonest cultivars have been selected for purple foliage and pink flowers and known generally as Purple leaved Plum, such as Prunus cerasifera ’Pissardii Nigra’, a handsome form with purple leaves and dark wine-red fruit. Introduced into France by Pissard, gardener to the Shah of Persia. It is a cultural form of Prunus cerasifera and is one of the best of all small purple-leaved trees.

As always comments and questions are always welcome.

Simon

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Shrub of the week Viburnum tinus

Friday, January 29th, 2010

Viburnum tinus- Laurustinus

Viburnum tinus is a winter flowering evergreen shrub with white flowers, which will grow in most conditions, happily existing in poor soils and even shade.  It has dark green oval leaves, densely held which makes it suitable for hedging, it can easily grow over 8ft tall and as wide.


Probably the most endearing feature of this evergreen is it’s preponderance to flower throughout the winter months.  The pink flower buds opening into tiny, star-shaped white flowers, carried in flattened heads and these are followed by small dark blue-black fruits.

Originally native to the Mediterranean and North Africa occurring in more luxuriant type of macchia vegetation it has been cultivated in Britain since 16th century.  This most useful evergreen shrub has been popular in the garden ever since.

As always comments and questions are always welcome.

Simon

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Discovering Hedgerows

Monday, January 18th, 2010

If you drive down any country lane in Britain you will normally be bounded on both sides by glorious native hedges. To the untrained eye these hedges can all look very similar but in actual fact a wide variety of plants are found in these hedges all offering something different. When planting a native hedge it is common for about 60% of the hedge to be  Hawthorn (Crataegus monogyna) the remainder can be made up from a wide selection of native plants, I hope to give you some insight into these hedging plants in this blog.

Hedge Somerset Selection


Hawthorn – Crataegus monogyna

Crataegus MonogynaBy far the most common hedging plant in Britain hawthorn or quickthorn  can make up anywhere from 50-100% of a native hedge. The main reasons for its use are due to the fact it is  fast growing, hardy and will grow almost anywhere.  It is stock-proof and reacts very well to heavy handed pruning such as that done by a tractor and flail. Distinctive white May blossom clothes the branches and shiny red, haws provide a wonderful feature in autumn.

Blackthorn – Prunus spinosa

Prunus spinosaA woody native shrub with blackish bark and dense thorny branches that make it such a good hedging plant. It is the earliest hedging species to flower producing small white flowers in March/April and it is also famous for producing “sloes” in the autumn that can be used for flavouring gin.  A very hardy plant that will grow on any type of soil.

Hazel – Corylus Avellana

Corylus avellanaA small multi stemmed tree/shrub well known for producing edible nuts in the autumn. It’s multi stem form along with its ability to shoot from the base make it ideal in hedges. It also has long yellow catkins draped from the branches in spring. Very hardy and suitable for all soil types.

Dogwood – Cornus sanguinea

Cornus SanguineaWith green and red stems in the winter this native shrub offers some late year excitement in a time when many plants have little to offer. Small clusters of white flowers appear in the spring followed black berries known as dogberries in early autumn. It’s green leaves turn a nice shade of red in the autumn. This versatile plant will grow in most places and is even happy on wet ground.

Guelder Rose – Viburnum opulus

Viburnum OpulusThis native plant, found in damp woodlands as well as hedgerows has lots to offer. White flowers in spring with berries forming in late spring and turning a luscious bright red in the autumn. Its 3 to 5 lobed maple like leaves also turn vibrant colours in autumn. Often found thriving on damp ground.

Wayfarer – Viburnum lantana

Viburnum lantanaWith large, thick grey-green leaves turning red and orange in autumn, and large heads of white flowers in late spring this native shrub has a lot to offer. Producing fruit that is green at first, turning red, then finally black at full maturity. Very versatile and does particularly well on chalky soil.

Ligustrum vulgare – Wild Privet

Ligustrum VulgareThis semi-evergreen shrub offers some leaf cover in all but the harshest winters. The small glossy black berries are poisonous to humans but readily eaten by thrushes. A hardy plant that also grows well on chalky soil.

Dog Rose – Rosa Canina

Rosa_caninaA shrub with strong thorn covered branches that is commonly found in hedgerows. It has pink or white scented flowers that are 4-5cm in diameter, later producing big bright red rose hips. As with most of the native hedging plants it will grow on most soil types. Its vibrant green branches are covered with sharp thorns and work well as a barrier.

Elder – Sambucus nigra

Sambucus nigra A fast growing native hedging shrub that produces both white flowers and attractive black berries that are used in the making of elderberry wine.  As well as looking good these berries are also an important source of food for birds. It is a very good plant for extremely chalky sites.

Purging Buckthorn – Rhamnus cathartica

A very thorny native hedging plant with glossy green leaves that turn yellow in autumn. It produces green/yellow flowers in the spring that produce glossy black berries later in the year. Likes dry limestone soils and is also a source of food for brimstone butterfly larvae.

Alder Buckthorn – Rhamnus frangula

Preferring damp ground this good hedging plant has small glossy green leaves that will also turn yellow in autumn. It also produces fruits that turn from red to black and are equally attractive whilst in either state.

Spindle – Euonymus  Europaeus

Euonymus  EuropaeusOne of my favorite hedging plants Spindle has square green stems providing some interest in the winter. It is in the autumn that this plant really excels, producing pronounced pink seed casings that open up to reveal orange seeds. Its leaves also change from green to fiery red and purple. Prefers dry sites does well on chalk soils.

Field Maple –  Acer campestre

Acer campestreBritains only native maple tree, it is  very versatile, as happy in a hedge as it is standing on its own in a field. It has small leaves of a classic maple shape that turn buttery yellow in the autumn. Field maple is almost as common in hedges around the country as hawthorn, though it doesn’t like wet ground.

Goat Willow – Salix caprea

Salix CapreaA native tree or shrub that works well in hedges due to its rapid growth rate. Its main feature is large silver (female) and gold (male) catkins that are produced in late winter/early spring. It will grow almost anywhere especially on wet ground making it a very versatile plant.

Holly – Ilex aquifolium

Ilex aquifoliumNeeding little introduction this wonderful evergreen plant is used less and less in hedges due to its increased cost as it must come container grown instead of bare root. Glossy green spiked leaves give it a wonderful year round colour. Female plants become covered in berries from late autumn through the winter. It doesn’t enjoy wet ground.

Crab Apple – Malus Sylvestris

A thorny native tree or shrub is often found in old hedgerows and thickets. White flowers in spring give way to small ornamental 2-4cm yellowish green fruits in the late summer which ripen to an orangey red in September/October. Though sour to eat they are often used to make conserves.

I hope this article has given you some insight into the plants that make up native hedges in Britain, I will talk about other aspects of native hedging in other blogs.

As always comments and questions are always welcome.

Simon

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Snow, Frost and Trees

Friday, January 8th, 2010

As we are having a second year of very snowy and frosty weather I thought I would offer a little advice and information on how trees cope with this weather and anything we can do to help.

chewvalleytrees in the snow

Deciduous trees.

Deciduous trees that are hardy to Britain will be fine in this weather, part of the reason they drop their leaves is to cope with sub zero temperatures.  This being said some flowering trees that have had buds on them through the winter such as magnolias may well not flower this year as the buds have been frozen.  If you have a newly planted tree, once the snow/frost has melted it is worth checking it is still firm in the ground.  Due to a process called frost heave,  the soil expands when it freezes then contracts again during the thawing process and can cause the roots to move in the ground.

Evergreen Trees.
Evergreen trees have a harder time in frozen weather, the rather obvious reason for this is that they still have leaves on. This causes two main problems the first is what is  a physiological watering disorder due to the fact that they are still growing. Evergreen trees never stop growing they just slow down significantly throughout the winter.  This results in them still needing water and when the ground freezes they can’t get it, much like a drought in the summer.  The second problem is that the water in the cells of evergreen plants freezes causing some damage to the cell walls. Evergreen trees and plants that are hardy to the UK have a number of mechanisms to cope with these problems and while they may look a little sad they should pick up well once the spring is upon us and they start to grow at a good rate again.

As always comments and questions are welcome.

Simon

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