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PH problem

thcwncstarted grow question 4 years ago

Hi.I have problem with low PH Grow in soil canna terra proff+,mineral canna terra nutrients , led lights,its 3rd week bloom autos Leaves turning yellow from bottom and yellow tips on top.I was sure its npk deficiency and maybe cal mag or light burn. EC:1.4 PH:5.5:( What to do ??

thcwnc

thcwnc

thcwnc

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Buds. Not fattening

Leaves. Tips - Burnt

Leaves. Color - Yellow

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ChitownCannaChicaanswered grow question 4 years ago

That’s a big drop of ph… have you tested your meter lately? Calibration? Also. Autos only need about 1/3 to 1/4 of the recommended strength nutrients that photos need. Keep that in mind

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thcwncanswered grow question 4 years ago

Ph meter is calibrated corectly . 1/3 recomended doses for autos , I didnt know that . What about Boost ?? 1/3 dose as well ?? Its my first time with autos and last :) I will be more careful now .

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GMSgrowsanswered grow question 4 years ago

You can get lime from your local nursery. Apply small amount and water in. Lime will quickly raise your ph... Cheers.

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thcwncanswered grow question 4 years ago

I feed with PH 6.5 and EC 1.2 so why PH dropped like that ?? My tap water after 24h is PH 7.5. I will try watering with that PH without nutrients . Is it a good idea ?? Sorry for double post but I dont know how to edit first one to add photos.

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