(1) I was amazed to find that the comfrey plants (I planted the offsets last Thursday) which were only just sprouting a couple of days ago, all now have proper leaves!(2) Some 3 percent of all flowering plants produce these chemicals, including such herbal-garden favorites as borage and comfrey .(3) Himalayan balsam crowds out native plants such as comfrey and willow herb, which are both important food sources for insects.(4) Particularly good trap crops include: green lettuce, cabbage, calendula, marigolds, comfrey leaves, zinnias and beans.(5) These products often include comfrey , chickweed, echinacea, calendula, goldenseal, plantain, essential oils, and a host of other herbs in a base of olive oil and beeswax.