Psst—check out the perennials you should cut back every fall. This perennial sunflower (Helianthus), also known as Jerusalem artichoke, is often cut down in fall. However, it’s better to leave ...

Jerusalem artichoke (Helianthus tuberosa ... preferably after the first frost. Plant this tall perennial on the north side of ...

Helianthus angustifolius is a perennial sunflower that produces lots of bright golden-yellow daisy-like flowers on tall stems. JANE: For plants to be healthy they need access to both water AND ...