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Grow QuestionsI flushed it because some leaves were showing some...

I flushed it because some leaves were showing some...

AtticGrowingstarted grow question 5 years ago

I flushed it because some leaves were showing some Nitrogen Toxicity. Run off was coming at 3000ppm and I fixed it to 1500. Now the older fan leaves are yellowing with some brown spots (check the last picture). It's a deficiency? Should I increase nutes? Thank you very much!

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Week 8

Leaves. Color - Dark-brown

CRiSPrGrowanswered grow question 5 years ago

Hey there, looks like you have a 24hr light cycle, this will kick your plant into overdrive, which is where you're at now. When the plant is like this it will still have a circadian wilt , but shorter in length so it's growing more. You're gonna start seeing all sorts of deficiencies now unless you drop the light to 18/6 (which is still a lot!) right now i'm seeing calcium deficiency (small spots on the leaves) K deficiency (large "colourful" spots") some light N deficiency (light green), some mag deficiency (edges of the leafs affected). If you dont want to reduce the light cycle i do believe you can get good results but you need to hve a cal mag spray once daily, or maybe every other day. this should fix the yellowing and the cal mag deficiencies. You've started adding PK which is a good thing : a good rule (of thumb) is when the buds are the size of your thumb, then add P/K. Hope this helps my friend ! 🚀

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GreenHouseLabanswered grow question 5 years ago

I would lower your light cycle to 18-6 to start off. Add some cal-mag to your next watering and lower your PH to 6.5 to best absorb the calcium and magnesium. This is a crucial stage in your growth so take it easy and don't over feed. Best of luck!

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Wicked_Stixanswered grow question 5 years ago

It looks like light burn to me. Is it only affecting the leaves closest to the light? 13" is pretty close if you have a high wattage led. Good luck finishing her up!

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LongJohn420answered grow question 5 years ago

Hi! Looks like magnesium defiency to me this new one. add some calmag and you be good. But I'd check this useful link: https://www.growweedeasy.com/why-cannabis-leaves-yellow Happy growing!

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Stickanswered grow question 5 years ago

Hi @AtticGrowing! I'm not sure about the past nitrogen toxicity, your plant looks a bit yellowish, a Nitrogen toxicity would have affected the leaves coloration, making them dark green with burnt tips. My bet is that you flushed while this wasn't necessary, so you managed to get rid of old nutrients but now your plant is starving, asking for more Phosphorous as they try to expand bud sites into flowers. One other parameter to consider is your pH, being a bit high, not acidic enough. In soil, you want a ~6.2pH for the best results in nutrient intakes. So in this situation I would give it a good meal with P+K booster and make sure the pH is around 6.2, then see how it goes after a few days. Hope this will help, keep us updated and happy growing! 👊

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Hellishjamanswered grow question 5 years ago

Looks to me like phosphorus deficiency, when did you feed after the flush? She looks like she needs a little bump of phosphorus that’s for sure! When you do another feed just increase your P slightly!

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