Sunday, 10 September 2017

Tree planting: growth update

We regularly check the progress of the trees that were planted last November/ December, to see that the tubes and stakes are still upright and secure from rampaging deer.  There have been  very few 'failure to thrive' saplings, and of those that have flourished in the 8 - 9 months since they were planted, the Hornbeams are winning in the growth stakes, closely followed by Sweet Chestnut. They've all burst out of their 1.5m tubes and some are now over 2m high. The hornbeam whips were 80cm-1m high and 2 - 3 years old when planted. So they've grown between 50-70cm in 8/9 months. Not at all bad, and perhaps due to a summer with lots of  hot sunshine and regular downpours.  The Wild Cherry are also growing fast, and some have reached the top of their tubes.  Not surprisingly the oaks and beech lag behind but even these have made slow but steady progress, and look healthy when we stand on tiptoe and peer down the tubes. The beech are in mesh tubes and can be seen easily. Other trees doing particularly well are our three Plymouth Pear specimens.

Hornbeam
These seem to be very easy to grow.  On average they reach 6m high and 4m across in 10 years and 25m x 20m when fully grown.  Ours appear to be growing at a much faster than average rate, in their first season at any rate.  They grow in full sun or partial shade and can tolerate any aspect or soil. The leaves provide food for many small moth caterpillars and the nut-like seeds are eaten by wood pigeons and the uncommon and elusive hawfinch. There were two Hornbeams in the entire 30 acres until  many more were planted last winter.

Flourishing hornbeam sapling with improvised tube extension 

Wild Cherry 
These can grow 35ftx25ft (11m x 7.6m) in 20 years, with a full grown height of 60ft (18m) Its Spring flowers provide an early source of nectar and pollen for bees, and the berries are eaten by birds including the blackbird and song thrush, as well as mammals such as the badger, wood mouse, yellow necked mouse, and dormouse. The foliage is the main food plant for caterpillars of many species of moth, including the cherry fruit and cherry bark moths, the orchard ermine, brimstone and short cloaked moth. There was one sizeable group of these in OC2, plus a few scattered individuals, and the new plantings will help distribute them better across the wood.

Sweet Chestnut
These are also fast growing,  long lived, and stately trees, usually growing to around 8 metres  after 10 years, and 35 metres  when fully grown, They can live for up to 700 years. We only have one mature specimen in the wood.  The flowers provide an important source of nectar and pollen to bees and other insects, and red squirrels eat the nuts - sadly we have only grey squirrels but I think they would enjoy chestnuts too. A large number of micro-moths feed on the leaves and nuts as well.

Plymouth Pear
This is a rare wild species of pear which was discovered in Devon in 1863. It's not a native to our wood, but is one of a small number of non local trees which we have planted for interest - and also because it's one of the rarest trees in the UK. There are only c 15 trees left in the original spot where they were found in hedge banks around the city of Plymouth.

Alder Buckthorn 
Mature trees can grow to a height of 6 metres. The outer bark is dark brown but the inner bark is bright yellow when exposed. It is the food plant of the brimstone butterfly whose caterpillars eat the leaves. Its flowers provide a source of pollen and nectar for bees and other insects and its berries are eaten by birds. It is 'widespread but rare'  says The Woodland Trust.


Alder buckthorn growing at the edge of the ride

 Quite a few of these were planted and protected last winter, since nearly all of the naturally regenerating ones were being enjoyed by snacking fallow deer. But to our surprise  numerous alder buckthorn have survived deer depredation this year.  Some of this success must be down to regular and well organised deer management, but also we think due to the large amount of brash left as a result of our Big Pine Thin of late 2015. Deer like an easy meal, and are reluctant to negotiate large amounts of woodland 'rubbish'  in order to reach a tasty morsel.  This has helped protect new growth, and now it's coming up all over the Northern end of the wood, where the majority of  felling took place. It's very welcome as it provides excellent shrub layer/understorey which we're very short of at Old Copse.






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