White widow autoflower yellow with brn spots

I have 4 ww autoflwers in soil in flowering stage ph is between 6.5 and 6.8. Water about 2 liters per plant when dry about every 2 days. Light cjedule is 18/4 in grow tent. Feeding 2 water days then 1 nutrient (flowering) day. Tips are curling up and crispnand yellowing with brown spots. I think I was watering when slightly moist originally. Any ideas

Looks like nute burn to me. Give her plain water for a couple of weeks then start feeding again.

Autos are notoriously difficult to feed throughout flower.

Calcium deficiency. Note it’s in the newer growth. What size containers?

hotrodharley said:

Calcium deficiency. Note it’s in the newer growth. What size containers?

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4 gallon pots, just started flowering. Its in the 10th week of growth.

Gave calmag last watering

lloydsmith1957 said:

4 gallon pots, just started flowering. Its in the 10th week of growth.

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You’re severely underwatering. You should feed or water with a full 20% of container volume. Water by weight and not by a schedule.

And I’m betting they’re deficient overall. Autos can take the same feeds as photos.

Id agree with Hotrod, looks like a calcium deficiency. The leaf curl is odd too, not sure if thats genetic or a sign that theres more going on. What nutes are you using and at what strength? Also you said soil but whats the specific product? How old are the plants? The more details you provide, the better response youll get.

And, probably not super relevant, but you mean 18/6 light schedule right? 18/4 is only 22 hours.