Aphids on indoor Hibiscus
Does anyone know how to get rid of aphids on hibiscus plants grown indoors? I have four of these that are continually infested. Whenever there is a new bud forming, the aphids appear. I have washed them off with a strong spray of water, and/or with safer's soap, monthly for about a year, whenever I see the aphids on them, to no avail. The plants still bloom, but I imagine they would bloom more often if the aphids weren't sucking the life out of them.