Possible pyrethrum burn

[Stophie]

I sprayed my plants with pyrethrum and I think I used to much as my leaves burnt a bit and the leaves are drooping, there has been some recovery, leaves are back green and plant leaves has lifted slightly overnight, how long until the plant fully recovers

[Stophie]

It’s mostly small foliage that is still dropping , can’t be nutrients as I’m using between 1100-1250ppm