Was tun gegen gelbe Blattspitzen bei Cannabispflanze?

Hallo, mein erster Grow (Fat Banana Auto) hat seid ein paar Tagen gelbe Blattspitzen (siehe Foto) Ich baue im Grow Zelt an bei relativ konstanten Bedingungen, 18/6 Lichtzyklus und ich dünge circa alle 3-4 Tage. Sie geht jetzt so langsam in die Blütephase. Tritt nur bei den oberen neueren Blättern auf. Was kann ich tun?

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aXXLJ
8 months ago

At the start of flowering, the fertilizer has to be changed to phosphate-containing substance, but the plant now looks over fertilized so that you should give less often flower fertilizer than (previously) growth fertilizer.

If the plant is stable in blossom all older leaves become yellow anyway and can be removed to provide more light to the underlying shoots and flowers.

Lubitz12321
8 months ago

mM a potassium deficiency due to nitrogen excess. More like 1x a week liquid fertilizer is too much!

peace87
8 months ago

Looks like potassium deficiency.

Increase the NPK fertilizer should help. If no nutrient barrier is present by constant overwatering of the nutrient solution.

Lubitz12321
8 months ago
Reply to  peace87

Not even more fertilizers on it 🥲

It has more than enough nitrogen, visible on the dark green leaves. With too much nitrogen, the potassium absorption starts, therefore the bright leaf tips.

Lubitz12321
8 months ago

So pour 2-3 times only with water and then less than according to fertilizer scheme but the components proportionally as indicated. And only fertilize 1x a week.

Gaernter
6 months ago

I’ll see you right away.

Try to reduce the amount of fertilizer. Hope I could help you:)