should I cut down petunias that have become leggy?

Question

will the petunias grow back?

Answer 1

Yes. Cut them back by at least 1/3 of their length so you are sure to cut off the seedheads forming. The seedheads will shut off the flowers. By shearing them back, they will return quickly to bloom again. Also give them a slow release fertilizer if you haven't fertilized recently, such as a 10-10-10.

https://www.gardeningknowhow.com/ornamental/flowers/petunia/petunia-care.htm

https://www.gardeningknowhow.com/ornamental/flowers/petunia/deadheading-petunias.htm