What is going on I just switched it over to flower never had it till about a couple of days ago
I don’t know a whole lot since I’m new to all this, but it does look like a magnesium deficiency to me. Google cannabis deficiencies and there will be images to come up showing all the different traits. Good luck
Same here. Looks like start of magnesium deficiency assuming your PH is within proper range. Soil 6.2-6.8
You might want to start adding about 1 tsp (5ml) of epsom salt to your water each time.
Without more details on your set up that’s about as far as I can go with this.
It’s only on the new growth which I just read is iron deficiency so I flushed it with water pH to 6.21