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Grow QuestionsClose to harvest leaves curling, crispy, yellow tips

Close to harvest leaves curling, crispy, yellow tips

Slurpy_Terpystarted grow question 4 years ago

The leaves of some of the main buds are showing problems. The tips are curling/pointin up and crispy and have yellow/brow tips. The leaves also seem to be showing big spots but the color is difficult to see since the leaves are grey/purple/brown the spots seem greenish/yellow

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Week 17

Leaves. Edges burnt

Leaves. Tips - Burnt

Leaves. Curl up

Kingdon007answered grow question 4 years ago

I suffered with this in the past. Pinned it down to light stress as all other factors were down. 1 way to tell if its light stress is if ur leaf stems go purple. Which I see yours a very red. This is basically sunburn. If you have a fell spectrum only go 2 100% last 2 weeks of flower. The sunburn is caused by the uv that the lamp gives off and although great for thc production you only want to apply it when buds are at most susceptible to it. I go on manufactures guide most of the time but I have great reflective walls so I take off 5% regardless the height, my light is at 26" at 80% if I go down to 18" I go downtown to 60% Guide is 18to24" 60-80% power im only at 80% as my light is slightly higher. My stems stay green now. Look into Shane from Migro-and flushing. Very interesting shit based on the myth behind flushing. Long story short you don't need to. As its impossible to change the chemical makeup of a plant thats taken months to form. The smoothness comes from a very slow dry in a controlled enviroment. Any way I'm rambling Catch you on the flip side

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Kingdon007answered grow question 4 years ago

Have a look into the way they cure tobacco. You can correlate some shit together as tobacco growers dry the stuff for up to a year for smootheness.. safe

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Dwckanukanswered grow question 4 years ago

Cal mag deficiency but this is also very late in flower is it only affecting the leaves that get light? Smoke24 is right on his response too may just be a sign your close to done

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smoke24answered grow question 4 years ago

you are going to have changes in the leaves this late in flower. With such a short time left, adding more nutrients isn't going to help any. Just keep an eye on the trichomes. I assume you will be flushing soon anyway, which will cause the leaves to fade out. Happy growing.

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Slurpy_Terpyanswered grow question 4 years ago

More details: ==> I assumed the most safe bet is too much light (adding more or less nutrients can be risky if I diagnose wrong): - Genetics is a version of Dosidos, day 54 flower (approx 7-10 days to go? 1-3% amber 30% milky at the moment) - system is DWC, approx 30L of water in the reservoirs - The light is a 300w sp3000 led at 100% and was at 35cm so I put it higher at 45cm and dimmed to 75% power (this was yesterday, the issue did not seem to progress since then) - The nutrient reservoir was changed 5 days ago, with a ppm of +150 above tap water. The previous reservoir had a ppl of +300, I am lowering the nutrients as harvest is coming closer - The ppm slightly increased every day, and ph stays pretty stable at 6.0, so I add a bit of tap water to keep the ppm stable --> this is why I didn't add more nutrients (ppm rising) - Temps and humidity are good (23-25c and 40-50rh during day, 19-19.5c and 55-65rh during night) -> My first diagnosis was a potassium deficiency (tips curling up, brown/yellow tips and brown/yellow leaf edges), however some tips seem slightly burnt and with the ppm rising +10 to +15 per day I try the solution for a light burn before messing with the nutrients. I use plagron nutrients with green sensation has a lot of potassium and ph is in good range. Please let me know if you think I have the light burn diagnosis wrong! :) Good luck with your gardens!

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