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Grow QuestionsPin the tail on the deficiency

Pin the tail on the deficiency

Misanthropestarted grow question 2 years ago

Some yellowing that developed on Gelato Auto in the last coupla days....my guess is nitrogen deficiency since feeding has been light throughout growth but I'm still new to the game and would love to hear from some more seasoned growers

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Week 11

Leaves. Color - Yellow

Feeding. Deficiences

Mr_Weeds_Autosanswered grow question 2 years ago

@gottagrowsometime is correct, this is certainly a potassium deficiency, and with you being in late flower the plant could be telling you she needs more potassium which is important in the flowering stage, I wouldn't say you have a lockout after checking out your diary everything seems fine except for your humidity, low is good at this stage but not that low. Lol. It should be around 40-45%. With very low humidity, the plant is drawing water from the soil at a very high rate, and if the humidity is too low, the plant is unable to draw water at an equal rate through the stomatal openings. The result is that the plants close their stomata, which slows the photosynthetic process and leads to stress, slow growth, and compromised yield.

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Chow_13answered grow question 2 years ago

Looks more like a lockout from to many nuturents then a deficiency to me. 1. Make sure PH is in the correct range when watering. 2. When you water are you watering until you get some runoff. 3. Check your EC/PPM of nutrients going in and compare that to the EC/PPM of the water coming out. They should be close to the same if you have not changed your feeding amounts recently. I am guessing you have a salt buildup and need to give just water for a bit, Then when you do feed do a lower dose. First sign of excess feeding is the tips of the leaves start to burn. The pictures you have are far past the first sign as its more then just the tip but a full knuckle that is now burning.

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gottagrowsometimeanswered grow question 2 years ago

It's not nitrogen def. Yes, @Brawne is right. A otherwise healthy plant will show signs of N def by way of the new growth sucking N from the lowest node, it goes to the first place it can. But then why is the top showing signs of def too when that leaf isn't fully yellow, meaning it was fully N drained. It's more of a potassium def. As them leafs would be pure yellow if your plant was sucking it dry. At the Def wouldn't be so uniformed. Def not N with what you are using. AN line is full of N, not so much P, cut back on the ML/L also, all your nutes have everything they need. Your more than likely suffering a def because you got nute lock. Happy growing

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Brawneanswered grow question 2 years ago

I would agree. Another giveaway is that, as it seems from the photos, the yellowing is on the lower, older leaves. Nitrogen is a mobile nutrient and in case of a deficiency, your plant pulls it out of the lower leaves and allocates it to its canopy leaves where there is (more) photosynthesis taking place. Calcium by contrast is a immobile nutrient for example, and a Ca deficiency shows in young, newly formed leaves. Good luck.

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