Not sure if this should be here or on the trees, shrubs& hedges forum, but I have a problem with my small Lemon trees. They are 2 years and only 2 out of 4 of them are shrivelling.
One is quite small and has shrivelled a lot. Its main branch has tipped over and it now looks dead.
The other is about 1 metre tall and is shrivelling less. The leaves are hanging down, but only some are shrivelled. This is about 2 months since I started using citrus tree fertiliser on them.
Any ideas what could be causing this?