Terp1answered grow question 3y ago Slight magnesium deficiency, I would say. Possibly locked out by too much nitrogen.
Water with pH-regulated water and 20-30% runoff, then water with a light nutrient solution and CalMag.
If you have Epsom salt, you can also make a solution of 0.5 grams of Epsom salt and 1 liter of water and spray the leaves with it. This way, the plant can directly take up the magnesium again.
Happy Gardening 💪😎