Since fennel is obnoxious to many plants if planted near by, does it have a similar effect if the fronds are used as mulch?

Question

I am particularly interested in using fennel as mulch for succulents.

Answer 1

I'm sure you can use it, but it probably won't last long. It most likely will decompose quickly and the feathery fronds won't help much to conserve moisture or reduce weed germination.
https://www.gardeningknowhow.com/plant-problems/pests/insects/plants-that-repel-aphids.htm