Can you please tell me what to spray on them? They are about 18 months old and nearly all of their leaves have little nibble holes in them. Please help.
Certified GKH Gardening Expert
It is hard to say what is eating them without you having seen the pest and being able to give a description.
That being said, neem oil is a good organic, general pesticide that only attacks pests that actually eat the plants treated with it, Just to be on the safe side, I would recommend also treating with Bt for caterpillars. Neem oil is effective on caterpillars, but Bt will be quicker. Here is more information on both: