Comfrey is every gardener's friend. It had gained popularity in recent years alongside permaculture and for good reason. Comfrey is a dynamic accumulator of nutrients. This means that it brings nutrients from the soil including iron, nitrogen, potassium, calcium, magnesium, and many trace minerals. Comfrey leaves are a great addition to the compost pile and can also be used as mulch (you can cut it back several times a year). As it decomposes it releases the minerals it mined from the soil to parts where other plants can reach it. It is commonly use in fruit tree guilds. To top off all that goodness, bees love it! Bocking 14 is a sterile and thus does not spread by seed and will not over take your garden. USDAZone 2-9, 7 live roots organically grown. Shipping included in the U.S.