Black eyed susans have been a gardener's favorite for generations, and the bright black and yellow blooms never fail to brighten up a flower bed. Black eyed susans are very easy to grow, and will reseed themselves in late summer, promising a fresh crop for the coming year. The blooms are beneficial because they attract honeybees, hummingbirds and butterflies, and the long stems make them perfect for cut flower bouquets.
Prune black eyed susans often during the growing season, and remove all spent blooms. It works well to snip down to the next developing bud. If you don't see any new buds forming, don't be afraid to cut the stem down to the ground. Although it may seem heartless, a good pruning will encourage new growth and a longer blooming period.
Water black eyed susans during dry periods. Although black eyed susans are very drought tolerant, they shouldn't be allowed to dry out completely for extended times.
Thin the black eyed susans every few years. Although black eyed susans grow well in dense clumps, occasional thinning will encourage larger, healthier plants.
Feed black eyed susans an all-purpose fertilizer a couple of times during the growing season. Check the manufacturer's label for specific instructions.