Help! My Sativa is going into flower with spots!

sava0068 · Jul 13, 2025

First grow outside Minnesota. Weather here has been super hot and humid.

I have 6 plants going and this is only happening to one of them. Starting only on new leaves at the top.

They're dark green with yellowish spots forming. I don't think this is septoria since it's happening at the top.

6.5 PH, GH nutes with aggressive feed schedule. 5 other plants are responding well.

22mucho · Jul 13, 2025

looking like early cal/mag probs, i have one just like this im going to flush

carlosescobar · Jul 14, 2025

that looks to me like too many nutrients , the leaves will start curling at the top but less as you go down...ive just done it to a plant (i mistook it for sunburn as its been really hot here) but i noticed it stopped smelling and i got spots like calcium deficiency.. im just watering with low ph water and ive misted the leaves with water with a bit of cal mag in it , because the roots might be locking out but you can still foliar feed.

mancorn · Jul 14, 2025

I wouldn’t mist a flower - leads to rot & mildew (especially if it warm). Looks like there may be some powdered mildew already but can’t tell from the picture. Post some better images and more grow info.

carlosescobar · Jul 14, 2025

mancorn said:
I wouldn’t mist a flower - leads to rot & mildew (especially if it warm). Looks like there may be some powdered mildew already but can’t tell from the picture. Post some better images and more grow info.

i tried to keep away from the buds , and its a plant that i am experimenting with , a spare. i always thought the first sign of too many nutrients was tip burn , but now i think about it i did give it too many nutrients over 3 waterings. i am in soil with guano and ...ive just realised what ive done, ...I top dressed with sulphur and guano , half way in flower and watered it in with water which had organic tomato feed NPK 4;3;8 , i did that twice.plus i added an inch of new soil which would have been nutrient rich and even then i took the leaf curling as sun burn..which i now realise doesnt happen as my other plants have not curled in this heat.
this is the other one ,wasnt quite as badly affected , but it now has zero smell , which i am taking as a bad sign. its got 50% milky trics so im going to give it a week and if nothing has changed , I'll chop it

superchola · Jul 14, 2025

I'm with the one guy looks like it needs some magnesium but I do not know if you give to your plants half way in flower I give mine some Epsom salt in water half way in flower

superchola · Jul 14, 2025

If it is a pure sativa sativa strains generally have a higher demand for magnesium compared to indica strains, especially during their long flowering cycles.

sava0068 · Jul 14, 2025

superchola said:
If it is a pure sativa sativa strains generally have a higher demand for magnesium compared to indica strains, especially during their long flowering cycles.

It's a hybrid. The other sativa's are reacting just fine. But I'll try to give it more.

GNick55 · Jul 14, 2025

is this plant in the ground?

sava0068 · Jul 15, 2025

GNick55 said:
is this plant in the ground?

No they're in 15 gallon fabric pots.

Help! My Sativa is going into flower with spots!

Help! My Sativa is going into flower with spots!

sava0068

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Help! My Sativa is going into flower with spots!

Help! My Sativa is going into flower with spots!

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