gardenia being bugged
I have a very old gardenia. I live in a cold climate so the gardenia only stays out in the summer. It has picked up leafminers and spider mites. I spray with Horticultural Oil every three wks. I don't think it is working. What is a good systemic insecticide to use indoors? I usually use Bayer Rose and Flower systemic but is that the best as it seems to take longer to work?