Live Organic Comfrey plant - Established and Rooted Plants - Bocking 14 Cultivar - comphrey - knitbone - By Yumheart Gardens Mulch  can be cut 1-2 x per year (4-5 x per year if fertilized) to about 2 inches above ground and used as a green or chop and drop mulch. Avoid harvest in the first season. Liquid Fertilizer - steeping chopped Comfrey leaves in water for several weeks produces a thick, dark liquid that can be diluted with water and "fed" to plants. Mineral Accumulator  high in potassium, but also phosphorus, calcium, Copper, Iron, and Magnesium Ground Cover  lower growing species can tolerate some foot traffic, plant 2-3 feet apart. General insect (especially bees) nectar and pollen plant Lacewings prefer to lay eggs on Comfrey Spiders prefer to overwinter on Comfrey Parasitoid Wasps and Spiders prefer to spend time and hunt on and around Comfrey