I haven’t had missing flower petals from black-eyed susans but this has happened with my coneflowers. This is usually a mite issue; they suck the nutrients and distort the flowers so there are missing petals. You need to cut back the inflected flowers to the ground in the fall and destroy all the infected parts (trash them, not compost).
I haven’t had missing flower petals from black-eyed susans but this has happened with my coneflowers. This is usually a mite issue; they suck the nutrients and distort the flowers so there are missing petals. You need to cut back the inflected flowers to the ground in the fall and destroy all the infected parts (trash them, not compost).