Black-eyed Susan’s naturally self-seed. That is, the flowers of one year provide the seeds that result in plants with flowers for the next year. Our hunch, and it’s only a guess based on your statement above, is that you removed the flower heads from the area. And this is based on the idea that you 鈥渢ook them down in November.鈥 What did you take down? If those were black-eyed Susans and if you removed the flower (seed) heads, then no seeds were there to set themselves.
OR (the plot thickens) we are thinking that because black-eyed Susans are not climbers per se (they stand tall on long stems), could it be that you had another plant entirely growing up the trellis?? Perhaps you have a photo you can take to a nursery to inquire what it is? (We can not accept/receive photos.)
Black-eyed Susan’s naturally self-seed. That is, the flowers of one year provide the seeds that result in plants with flowers for the next year. Our hunch, and it’s only a guess based on your statement above, is that you removed the flower heads from the area. And this is based on the idea that you 鈥渢ook them down in November.鈥 What did you take down? If those were black-eyed Susans and if you removed the flower (seed) heads, then no seeds were there to set themselves.
OR (the plot thickens) we are thinking that because black-eyed Susans are not climbers per se (they stand tall on long stems), could it be that you had another plant entirely growing up the trellis?? Perhaps you have a photo you can take to a nursery to inquire what it is? (We can not accept/receive photos.)