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Pruning acers

Without pruning many of our acer cultivars would have outgrown their allocated space and even reached a height of 20 - 30 feet (6.1 - 9.1m).  For example we have several Acer Japonicum aconitifolium ("The Fern Leaf Maple") plants are perfectly happy to be kept to  a size less than 4 feet (1.22m)  in height.

 

Most of our acer pruning is performed from January through to early March.


However, in our Walsall garden there is new growth during late April followed by rampant growth during May and early June. By mid June some of the acers  have produced new shoots up to two feet in length. We find most of the the new growth will look okay but during June some of the plants  require additional light pruning in order to restore the desired shape. We carefully prune out the lengths of new growth that look excessive or untidy. Our  aim to leave the remaining acer shape ready for summer, looking pleasing and with plenty of new growth to be enjoyed.


As summer progresses several of the acers continue to produce some new shoots however,  we would not normally need to prune any of this late new growth until the end of winter.


Occasionally we have performed the acer pruning in November or December  without any problem and in those years the winters turned out to be mild..........but we think if the winter turned out to be harshly cold then it would have been better to have waited to January or February to do the pruning!


What we do may not be what the horticultural books say but, it works for us!


Many of our acers are kept to a low mop-head shape, several are kept as small mainly branched-head standard trees and the occasional acer we prune to what we call a  'standard mop-head'  by which we mean a small compact  crown of branches like a 'lollipop' or  'mop-head'  on an upright single stem of about one metre in length.


Despite being over 20 year old, many of the acers look much younger because of their size.  Because they have a robust trunk and root system they look very healthy and produce an abundance of fresh foliage every spring, which brings such delight for us and our many visitors.


Planted 20 years ago and kept to small size