Need help with yellow leaves

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flanderz

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Noobie grower here who went away for vacation and left my neighbor in charge of the plants. He swears he was checking the pH but it seemed very high (7.8) when I checked the bucket he was using the morning I got back. This strain is Strawberry Slurpee with 7-8 week flower period and I grew this once before with modest success and without this problem.

I'm guessing this is a Nitrogen deficiency but I'm wondering if that's caused by the pH or lack of nutrients in the soil. I'm using Fox Farm hot soil and a very modest amount (0.5 tsp per gallon) of Tiger Bloom (2-8-4) during flower phase.

The other thing I will add is that it did get very cold in the tent (around 42) for up to 24 hours. It was INSANELY cold outside (-16 w/out wind) and the 30mph winds were blowing directly on my workshop. The adjoining garage also became way more cold than usual. The space is heated but the radiant heat could just not keep up under the extreme conditions. The problem was solved with a temporary space heater. I had about 6 small clones going and they all survived except for one so I don't think it ever got too bad in there. Obviously not ideal but what's done is done.

What do you think is going on? What's the ideal pH? Should I add some Nitrogen?
 
Need help with yellow leaves
Trixie

Trixie

366
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When you run feed and then the water you can knock the nutrient sequence off. That's why I think using low ppm nutrients with every watering is more consistent than feed, water, water, feed. For Fox Farms Ocean Forest and Happy Frog the best ph is 6.2 going in the top and 6.4 coming out the bottom. Those flowering plants should be ok with the cooler temps.
 
Trixie

Trixie

366
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IF you add nitrogen this late in flowering you can slow resin production. This late in flowering I would only give the plant a low dose of flowering nutrients with every watering.
 
Trixie

Trixie

366
93
Something to remember when one allows the soil to become too dry in a drought state calcium will become locked out days after the drought is over. Even with good irrigation after the drought, yellow leaves will appear.
 
Moshmen

Moshmen

8,218
313
Something to remember when one allows the soil to become too dry in a drought state calcium will become locked out days after the drought is over. Even with good irrigation after the drought, yellow leaves will appear.
SMH 🤦‍♂️ u just read this somewhere? Lol
 
Trixie

Trixie

366
93
I bet you have heard of Blossom End Rot on tomatoes. That's the same principle, as the soil gets too dry or in a drought state, the calcium crystallizes and becomes locked out causing the onset of the disease. You can have plenty of calcium in the soil but if the becomes too dry the plant can't retrieve it causing the yellowing of the leaves. Trix

What causes blossom end rot? Blossom end rot is caused by a lack of calcium in the fruit. This lack of calcium may be due to low calcium levels in the soil. More often, there is plenty of calcium in the soil, but its availability for uptake and transport to fruits is impaired. Google
 

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