Perennials Late March/early April cut back dead plants and apply a general purpose fertilizer. Every 3-5 years divide and transplant your perennials. Dig entire plant and cut into sections (2-3 growth buds each). Tangled growth, holes in center of plant (middle is dead) or reduced flowering indicates it is time to divide. Keep transplanted divisions moist until established. Remove spent flowers throughout the season. Prune stems back to crown of plant. Some perennials will bloom again in fall if this …