Can't find my green thumb!
This summer I went out and planted about eight varieties of heirlooms. I adore them, but I've had lots of problems... first all kinds of aphids, then white flies. Fighting that battle with Dawn and garlic, but losing. Now whole sections of plants are either turning yellow or wilting. The fruit seems pretty unaffected, however.
Did I screw up somehow? What am I doing wrong? And how can I avoid these problems in the spring instead of dealing with infestations?