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Grow QuestionsMy fan leaves are starting to yellow from bottom u...

My fan leaves are starting to yellow from bottom u...

MichaelMostarted grow question 6 years ago

My fan leaves are starting to yellow from bottom up-the first node has already browned and fallen off. They should slowly yellow right-during flowering, or is this a deficiency?

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Week 9

Leaves. Color - Yellow

FlavoursUkanswered grow question 6 years ago

Absolutely nothing to worry about. You've said it yourself, its older growth thats affected and yellowing which is normal as your plant uses up its food in its stores (leaves). The light isn't reaching the bottom growth of your plant therefore photosynthesis for the older growth is no longer occurring. The only time you would worry about leaf yellowing is if it was the new growth, then this would indicate a problem. I see you're still giving it veg nutes which is correct for the first 3 weeks of flower which is the only time you will need to be giving it the doses of nitrogen to support the plants vertical growth, after that you can gradually cut it out completely as it can hinder and slow down your plants bud growth, don't get me wrong you can still use it but it wont give you optimal bud growth which is what you want for flowering. So no, you don't have a deficiency in my opinion. Give your girls a bit of LST to open her up and get as much light through as possible as its critical if you want to see a nice yield come harvest day. I would also drop your humidity unless you want mold forming on your buds, 65% RH is way too high for flower. You want it in the range of 30-40% to minimise risk of mould and to see some nice trichome production. Do a bit of your own research also if you're not sure, information is easy to find. But yeah optimal RH for flower is 30-40% and even less in some cases in the last few weeks of flower. Good luck.

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Experimentgreenanswered grow question 6 years ago

Morning, so yellow leaves can happen for so many reasons from ph/over-under watering/nutrients/heat-cold/light stress. However yes yellowing before harvest is normal but not all out dying and falling off and down low like you're having.nitrogen deficiency will typically have that yellowing and the leaves eventually fall off or are easily plucked(if a leaf is stiff and hard to pull its probably not nitro) often without the yellowing down the veins of the leaf first(such as magnesium deficiency) nitro toxicity can also cause yellow but will usually be accompanied by clawed leaves. Too often people believe they have a nutrient problem when its actually ph or roots needing treatment. Oh and soon after flowering fox farm recommends removing the "grow big" but not until several weeks into the flowering stage. Best of luck, the plant overall looks pretty good, I hope you solve your problems. Happy growing.

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FlavoursUkanswered grow question 6 years ago

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Athosanswered grow question 6 years ago

First I'm going to assume that the EC of 28 (14.000 PPM) is typo mistake, because your plant would have burned to a crisp if you had fed that much. Overall the plants look fine and the lower leaves look a lighter shade of green more than yellow. Yellow leaves are a sign of nitrogen deficiency which is normal during the first three weeks of the flowering phase. That been said, sometimes the lower leaves turn yellow and die when they are no longer receiving light, due been shaded by the upper leaves. If it has been progressing from bottom up, then it's nitrogen deficiency and that means you need to give some grow / veg nutrients. This probably happened because you switched to bloom ferts too soon, the first three weeks of flowering (the stretch) is mainly an aggressive grow phase.

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