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What is causing this?? Theyve been curling downwa...

KillerKthulu
KillerKthulustarted grow question 5 years ago
What is causing this?? Theyve been curling downwards for a almost andew weeks now and yellowing older growth spreading up and at first it was yellow veins and green in-between now it's green veins yellow in-between if someone could shed some light it'd be greatly appreciated 😊
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Week 15
Techniques. Defoliation
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Mrs_Larimar
Mrs_Larimaranswered grow question 5 years ago
Hi, if you are having such along growtime, its always good to do a Flus, a very good one with lukwarm water. If you are growing so long there are sltbuidups hanging on the roots and blocking new nutrients. The soil is getting very dense and its tough for the roots to handle. Give her anice flush to flush away old builitups and give oxygen to the roots.. she will love it. Aftr the flusing you can start new: that means give her nutrients and beneficals ( living organics, bacterias, molasses) to enrich your soil. Iam sur your girls will shine soon again
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Master_weeda
Master_weedaanswered grow question 5 years ago
Hello If you will see my different tests you will see that my bubblegum had the same symptoms. It is a lockout of the one on fertilization it is enough for you to water several times with the clear water with a PH 6.3 that should be enough because your substrate must be saturated with nutrients Do not forget to remove excess water from the plate May the strength be with you 💪
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MarcXL
MarcXLanswered grow question 5 years ago
Top leaves turning yellow is mostly a zinc deficiency. In soil, zinc is best absorbed by the roots in the 6.0 – 6.5 pH range. Zinc deficiencies are more likely to appear when using heavily filtered or reverse osmisis (RO) water to feed plants since any zinc has been removed or wrong nutrition was given. Do you also use bloom nutrition or only cal/mag? Zinc deficiencies can show up when the plant is having root problems or if the plant is overwatered, even if the pH is right and the zinc is there.
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Grey_Wolf
Grey_Wolfanswered grow question 5 years ago
Looks like a nitrogen deficiency or a ph related nutrient lockout at the roots Is the cal mag all you have been feeding it? it needs Nitrogen potassium phosphorus iron etc etc etc I would recheck the soils ph and give them a feed
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