Does Comfrey Grow in Shade?

Comfrey plants generally prefer shade to part shade exposures in warm moist soil, although some cultivars require full sunlight to attain highest yields. There are some aggressive species and many self-sow readily. Propagation can be done via seed, division, or separation.

Where is the best place to grow comfrey?

Comfrey grows best in USDA Hardiness Zones 3-9. But will grow almost anywhere. Comfrey prefers a sweet soil with a pH of 6.0-7.0 and grows best in rich, moist soil in full sun, but will tolerate some shade. * It will grow well in clay, light sands or loams — whether in dry or wet areas.

Why is comfrey illegal in the US?

The pyrrolizidine alkaloids in comfrey can cause severe liver damage, liver cancer, mutagenicity, and even death. [8,9] For this reason, the U.S. Food and Drug Administration has banned the sale of oral comfrey products in the United States.