I used to foliar feed in the morning when the lights come on but after a few cases of PM I started foliar feeding when the lights are out and I foliar feed up to 2 weeks after the flip. I use kelp in my foliar feeding mix and only do it once a week but I dont want to stain my little white curlies when the pop out

https://www.maximumyield.com/when-is-the-best-time-to-foliar-feed-my-plants-lights-on-or-off/7/3660