Noticed these today. They were not there two days ago so I'm unsure if it's a deficiency or burn. Could be a mag issue? Medium used is biobizz light mix, feeds have been tap water (left out for a few days) apart from just over a week ago when I used some Grow.
Last feed was yesterday, used approx 1.4L water each like normal, with slight drainage to cover all areas. I don't check the ph of the water as I was told it wouldn't really matter in a soil grow. The issue seems minute. Each plant has like 1 maybe 2 leaves suffering from the problem but this could spread so best to sort it asap. If i've missed any info, do remind me please. Temps have been good lately, 29℃ and 44% RH
This is how they looked 2-3 days ago
Now Plant 1
Plant 2
Plant 3
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