The plant that is currently putting on the most spectacular show in the Johnson’s backyard is a pass-along plant known as swamp sunflower (Helianthus angustifolia). As is the case with many of the pass-along plants growing in our yard, it is not a plant my wife and I had on our list of plants that we wanted to incorporate into our backyard landscape. However, now that it has established itself, we are glad that it is a member of our plant community.
This Georgia native is extremely hardy. The woman that gave me the plant simply pulled a handful plants up by their rhizomes and handed them to me. When I told her I did not have any way to keep them from drying out until I got home, she told me not to worry about it.
When I arrived home several hours later, I soaked the rhizomes in a bucket of water and placed them in the ground. Honestly, I did not think they had any chance of surviving. Much to our surprise, they did not die and now, several years later have expanded into a patch some 10-feet long.
Swamp sunflower is a perennial that reaches a height of 8-10′. This fall-bloomer produces a wealth of 2-3″ golden daisy like blooms.
One thing that has endeared it to us is the fact that, in addition of adding beauty to our yard, it feeds a wide range of wildlife. For example, swamp sunflower is a host plant for the gorgeous silvery checkerspot butterfly. In addition, it is an important source of a food for a wide range of pollinators, including honeybees and bumblebees. Although it is touted as a butterfly plant, we see far more bees and other pollinators visiting swamp sunflower’s showy yellow blossoms than butterflies. Despite the fact it has the reputation of providing monarchs with food on their fall migration, we have never seen a monarch on our plants.
Once frost ends swamp sunflower’s blooming season, its seeds are relished by waxwings and other birds that feed on seeds.
The plant requires little water and is relatively pest-free. The only thing that I do to the plants is remove their dead stalks in winter after birds have consumed all of its seeds.
Since it will spread via underground rhizomes, I suspect that sometime down the road, to keep the swamp sunflower patch from extending beyond the place we have designated for it, I am going to have to remove some of the underground rhizomes growing extending beyond the fringes of the stand.
This is one pass-along plant that might be a perfect fit for your yard. If it is, I hope a friend or neighbor will share it with you.