Can I Cut Back My Brown Eyed Susans Before They Bloom So They Dont Get So Tall

Question

My plants get very tall and have very tiny flowers . Hundreds of them.

Answer 1

I would not. It wouldn't shorten them, as they are set by genetics, and would likely halt flowering for the year if done before the first flush. You can deadhead the spent blooms, however.

https://www.gardeningknowhow.com/ornamental/flowers/black-eyed-susan/black-eyed-susan-flower.htm