you need a big old black plastic bucket( like the 5 gallon paint buckets from sherwin williams but black not white, they are usually a $ or so unless you know a friendly painter...husband
is a painter but i had to
buy mine since he couldn't remember to bring one home

), drill a hole in the side that will fit the screw on your tripod so it will hold the bucket steady), cut a slit in the top of the same side the hole is in at the top edge of the bucket so the flower will fit through and voila, no wind , nice background...i've had the bucket for about 3 months, still no hole in it or slit but someday

(since now i will have a good 8 months till we have flowers again maybe by next summer) it would help to have an old crummy tripod to use for the bucket as well as your normal good tripod for the camera. this was online somewhere i forget where now but not to take credit for someone else's idea. no help for the breaking back part or trying to get that pesky bee or hummingbird to stay on the flower long enough to get a photo of it. i have dahlias in pots as well but since i basically didn't water them all summer they are more the "morticia adams" variety , maybe i should take some of those