I brought in four geranium planters for the winter and because I don't have a lot of light coming in through the windows because of trees, I put them under lights. I now find that I have brown and sometimes green worms eating the leaves. I pick off the ones I see, no problem, but I wonder how I can get rid of them for good. I sprayed with insecticidal soap before I brought them in but wonder if I should do it again. Where do they come from; the soil?
These are possibly geranium budworms, which are a difficult pest to manage, especially if you bring your geraniums inside over winter. Read here:
Hand picking or possibly Bt are controls. An alternative to trying to keep your geraniums growing in poor indoor conditions is to store them dormant without soil. Read here: