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greyish leaftips and dieing branches after topping

1juan420started grow question a month ago

the highest branches died after topping. It looks to me like they had the same symptoms like some new upper branches are developing now. It looks very dark & feels soft Temps were 17-19°C & Humidity was 90%+ Water should be PH5.9, think ph reader might be wrong and ph is too low?

1juan420

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Leaves. Color - Black or grey

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00110001001001111Oanswered grow question a month ago

topping doesn't cause that unless you gave it some disease from your shears. More likely it is coincidentally occurring. do you foliar spray? stop doing so if you do. foliar sprays without a good reason or in reaction to a problem are an e-peen that cause more problems than any potenetial benefit provided. 17-19C is quite cold for this plant. It's biological processes may be struggling. Could also be behind the discoloration - the dark blue or purple If pH were low, some of the first symptoms you'd see are calcium deficiency, which i don't see here. Looks like N is a tad high, but only the cauase of the slightly too lush/glossy leaves and not the primary damage seen. Any changes to fertilization lately?

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