Girl are not sucking up water like they use to

Jubilant said:

So I had some trouble with my girls, low N in early flower and major RH drop to about 30% for like a week. I got a lot of yellow leaves in the process.I am 7.5 weeks into flower, I am probably chopping in about 2.5 weeks so the yellowing didn't concern me too much. Now I notice I watered two days ago and the pots are still pretty heavy. I have never had any drainage issues, and for a while (during that low RH time) was watering every day. Is it a problem that they are sucking up the water THAT much slower now? It feels like I wont water till the day after tomorrow. Also how does this yellowing look did I let the damage go too far?

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BobCajun said:

Maybe you killed some roots by watering every day. Or maybe there's some kind of nutrient lockup preventing nitrogen from being absorbed. You didn't give many details about your setup.

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Lordhooha said:

Humidity generally lowers as flowering comes to an end. In the future take pictures in normal light (can't tell anything in purple light) like Cajun said you might have killed the roots watering so much I'm assuming your not in coco since the pots are still wet. How do you gauge when to water?

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Jubilant said:

I have some normal light photos I will post as well

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Lordhooha said:

If your chopping in 2.5 weeks the yellowing is fine. I see your using cloth pots but what size are they and what sort of soil you using? How are you watering them? I use dirt pots and still water every two days. Though mine are 7 gallon ones

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Jubilant said:

I have 5 Gallon ones. My medium is a 70/30 mix of sungrow potting soil and pure perlite. I have seen a couple fungus gnats but thats like 1 ever 3 days an Im in there A LOT throughout the day lol I don't think there is enough to cause any problems. Maybe I'm just stoned and worried the RH has been so low for so long and I finally got it to stabilize at 50-60% they may just not be perspiring near as much.

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Lordhooha said:

Do you just dump water in the pot or how I do it is I have a two gallon sprayer took the spray nozzle off and water from the base of the plant in a small circle and just slowly saturate it slowly from the inside out

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Jubilant said:

I don't think watering everyday hurt as they were BONE dry when I would water. The low RH made the pots dry out quick, plants were borderline dehydrated with some of those waterings. I couldn't keep up with how fast the water was being used. I do have the whole grow journal for this one on the link there. I can copy paste if you like

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BobCajun said:

Oh okay then, if they were that dry. Maybe don't use fabric pots next time. Doesn't help growth much anyway from what I've read. That's probably why they dried out so quickly. How did humidity get down to 30% anyway? Do you live in Nevada or something? I wouldn't try to get it to 50-60% though. More like in the 40s. Maybe 50 but not 60, that's actually pretty humid and you could get mold and less resin will be produced. Somewhere around 45-50 is usually good. Your plants look okay though. The buds are healthy. The 30% probably made them put more resin out too.

BTW, I followed your grow journal link and you said you use baking soda for pH adjustment. Bad idea there, since sodium is toxic to plants. You would need potassium or calcium carbonate instead. Harder to find but not toxic. They'll have it in hydro stores.

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Jubilant said:

I live in Alaska, but the girls for sure were not happy in 30% buds had explosive growth in higher humidity and in general the girls perked up more, being almost 100% sativa I am not too worried about mold the buds are smaller too, just a lot of them lol. I mainly try to keep it at 50% But you're right that 60% is too high, I will try to dial it in to be 40%-50%. I have switched to Potassium bicarbonate instead just no way to update that post.

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