lleylandi

[maggie01]

I mentioned some time ago about part of my hedge dying back. Well about 3 weeks ago I gave it a trim. I did not cut back too short. Now another part of the hedge which was green before I cut it has now gone brown. Whats going wrong.

[liquoricemad]

Could be lack of water.  Trouble with conifers is if there's a shortage of water the damage done isn't seen in the leaves until weeks after. Are there any competing shrubs or trees nearby? Is the soil it's planted in very dry? Is the hedge well established? If it's been planted for less than 2 or 3 years it may not have sufficient root growth yet to sustain the plants in the current heatwave we've been having (and not much rain either - at least not in the Midlands!)  What are the spacings of the individual plants? How tall is the hedge? If less than 6ft tall and wide, and spacing less than 3ft, it'll be struggling to survive.    Could also be a type of aphid that attacks Leylandii, resulting in whole patches of brown. One suggestion, if you think it isn't lack of water - do you have a local nursery? - take a sample of the leaves there and see if someone experienced can identify any sign of aphid damage.  Another thing it might be is damage from weedkiller spray drift. Hope this helps, it's been a while since I worked in garden centres, there may be other things it could be that I'm not aware of, so don't take my answer as gospel!

[Chessman]

Is the tree dying?, bend a twig to see if it snaps and is dry, if not, even though you can't see them, you have an 'Aphid' problem, a spray with a good insecticide will clear the problem, but of course, read the instuctions first.

[maggie01]

I think it could be aphids. The trees have been there for about 10yrs and are about 9 ft high. I would have thought though that other neighbours would have the same problem  if it was aphids but they dont seem to. I will have a look at sprays for this and give it a go. thanks

[liquoricemad]

Right - O, Will you let us know how you get on maggie?