I’ve got some rudbeckia & verbena at the back of the border, against a wooden fence, that have grown to 6’ plus this summer. I haven’t been able to find a way to support the stems and keep them looking natural. I’ve got some semi-circular supports just under 1 meter but the stems flop over these and snap, and I can’t find taller supports online. I’ve used string tied onto nails in the fence but it looks awful. There are too many stems to support each one individually. What am I missing (that won’t cost an arm and a leg!). Thanks.