"Most seed companies will be able to ... With many of the plants, such as echinacea, you can dig up the root ball, break it up, harvest what you need, and replant the rest. To dry the herbs ...

Growing coneflowers (Echinacea spp.) is the easiest way to ... pad and a heady supply of pollen and nectar. They rarely set seeds, making the retention of dead flower stalks redundant.