Posted: 17/08/2012 at 08:00
I planted 4 Pyracantha (red) plants in early spring. Three have bloomed, grown well and have berries forming. One is weaker with no berries forming and not much growth. They are about 4 feet apart and soil conditions are the same for all, a clay based soil with compost dug in. The weak plant has some yellowing leaves. Any ideas?