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Pyracantha Coming Away from Wall

My garden has a long established and very vigorous hedge of pyracantha (seems to be several plants of two different varieties - some red berries, others orange) which had been trained against a north facing brick wall. It looks like it was originally trained on using plastic trellis netting type stuff. 

More of the plastic support seems to have broken off in the past year or so, and now the whole hedge is really slumping forward, away from the wall. There is a clear 1ft or so gap opened up between the hedge and the wall at the top now - it used to be flush against it. I can only imagine its going to continue getting worse, because all the weight is at the front, pulling it away from the wall.

I've tried to tie back one or two of the bigger stems to the old plastic supports where they are screwed in, but the thorns make it very difficult, and the hedge is so heavy its very difficult to drag it back towards the wall.

What would be the best way of getting the hedge back against the wall? 

Is there any alternative to cutting it back REALLY hard and putting in some new wire supports/eyelets screwed into the wall? If I did cut it back really hard, I guess that would mean losing a years' flowers and berries :( Would late winter/early spring be the best time to do that if I did?

Thanks!

Posts

  • BorderlineBorderline Posts: 4,700
    I think it’s best you post a photograph. How high is it at the moment?
  • justincolsonjustincolson Posts: 3
    edited July 2018
    Here's a picture from the side - you can see how the back of the plant is totally flat where it used to be against the wall, and the plastic bits from the old trellis. One bit of bodged twine for now!

    The wall is just under 6ft, and the hedge is currently a few inches taller than that.


  • BorderlineBorderline Posts: 4,700
    Thank you for posting a photo. If you want to save it, my advice is to thin out the middling to top part of the branches, and then tie in as you have done so. But, I think this will still be an issue in the future. The whole growth has toppled forward because of the sheer weight.

    Wall trained shrubs need a lot of yearly controlling and once mature, a lot of the work is to thin out and control a portion of branches from maturing to a point of causing uneven weight distribution. Your shrub has got too mature and the branches at over 6 ft will mean heavy rain or even wind can cause it to peel away from the wall due to its weight.

    I would prune it all down to 4 ft and then continue to thin the growth from 4 ft downwards. I know it's not the advice you want to hear, but a mature shrub will rejuvenate quite well. You may lose flowers and berries, for a year or two, but trying to prop a shrub that dense and thick is just going to cause more possible problems in the not too distant future. Others may offer a different view.
  • josusa47josusa47 Posts: 3,530
    edited July 2018
    Having reduced the bulk of your plants as Borderline suggests, it will still need supporting. Have a look at Rivelin Glen's "Gripple" system.  I've read several favourable comments from forum members who use it, and I have it on my back fences, supporting honeysuckle, winter and summer jasmine, raspberry canes, and I tie my tall biennials back to it when they start to lean away from the fence.  I use the two-piece brackets that screw on to the fence posts; on a brick wall you'd need to drill and plug to put in vine eyes.  You might be able to use the existing holes. It's a very flexible system and reasonably economical, and no, I haven't got shares in the firm!

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