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Yellow spots on bigger fan leaves
MistaOCanswered grow question 19d ago
I can identify two clear issues in your picture. First, the curled leaf tips are a protective response of the plant to excessive heat, so it’s likely too warm for it. Second, the spots indicate a calcium deficiency. You should address this as soon as possible, as the problem will continue to spread if left untreated.
Calcium deficiency can be caused either by insufficient calcium supply or by an incorrect pH level in your watering solution. If you’re confident that your pH is within the optimal range of 6.0 to 6.5, you should consider adding a CalMag product to your nutrient mix. If possible, also try to lower the temperature slightly.
RasendeRollo92answered grow question 19d ago
Hey there !
Seems like nothing too serious.
Considering the colour of your leaves I think you burned them a bit with too much nitrogen.
Just water them with pure water 1-2 times & it should stop.
Hope this helped !
Happy growing 👊🍀
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pHilosophy420answered grow question 19d ago
Yo growmie, those yellow-brown spots with the leaf edges curling up look like early nutrient burn or a potassium deficiency, possibly made worse by a bit of heat or light stress. Since you're in Plagron Lightmix and feeding Bio Nova, it might be a bit hot for week 2 veg. That Mars Hydro FC3000 runs strong, and at 28°C, the girls could be feeling it. Try cutting nutes to about ¾ strength, raise or dim the light a bit if they’re still small, and make sure your watering is slow and even,big pots dry unevenly at this stage. If you can, check runoff pH and EC to catch any salt buildup. Damaged leaves won’t heal, but if new growth looks clean, you’re good. 👊👍
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Mr_Weeds_Autosanswered grow question 19d ago
Looks like the start of a nutrient issue or early deficiency, those yellowish-brown edge spots and upward leaf curl can point to potassium deficiency or early-stage nutrient burn. Since you’re in Plagron Lightmix (a light soil), the plant might be starting to demand more than what’s available around week 3. Also, the mix may be a bit hot combined with your Bio Nova feeding. I'd check runoff pH and EC just to be sure, could be minor lockout or overfeeding. Try easing up on nutes a bit and see if it stabilizes.
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AestheticGeneticsanswered grow question 20d ago
the edges curling is from excessive heat.
the yellow spots is the begining of calcium deficiency.
make sure youre dechlorinating your water.
chlorine toxicity looks similiar to calcium
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