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I am in rockwool

Thanks for your input mate I've been trying 2.5EC for a few days but i think it actually made it worse Buds are still quite fat but i dont want to have the same problem a third time I'm in rockwool btw. Media EC at field capacity is 5.5-6 (substrate sensors) Anybody else any ideas/input?

Hi guys, Every grow i see the same problem Marginal Necrosis I dont know if it's nutrient burn, calcium def or Potassium def. I had the same problem last grow (before that never). I am feeding 3EC Athena Pro, 6PH Feed two times a day, once after lights turn on and once mid day. Pushing 30%...

New problems. I dialed in the enviroment, the old burn is mostly gone but now I got leaf margins curling up and burning. Looking like some potassium issue. Tried EC 2.5 and EC 3 Athena PH 5.8-6 1000ppfd 26-27C 55-60RH 20% drybacks over night from 60% VWC to 40% VWC with peak EC of 8-9 in the...

i will dial all that in tomorrow when i am back at the farm. appreciate you sending, its really useful :)

you are talking about the burnt edges / potassium def looking pic correct? the bottom/second one in that post?

yup i agree. i didnt want to drop EC any further than 2.5 I am running UV+IR diodes in my LED fixtures which made me think its light burn on the latest pic I never ran UV or IR before so i have no clue if I should be more careful.

I will raise temps mate, thanks

Sorry guys i didnt get a notification this time, idk why Week 5 flowering starting tomorrow. 1000ppfd, 1000ppm Co2. 5.9-6 PH I am feeding 5 times a day to achieve 20% dryback (measuring with substrate sensor) stable 25 degrees C and 45 -50% RH I raised lights so they are around 70cm away from...

Just FYI its not the light. I turned them way down and it got way worse overnight. I am suspecting nutrient (B) lockout. I dropped from 3.0EC to 2.5EC input

They in rockwool 4" on slabs. Yes final

Having the same problem after running 1200ppfd week 3 of flower with 1300ppm Co2 in the room Light was too close. Just a bit more brown spots on mine Would you agree with me on this? @GNick55 Sorry for just posting my pic in your thread mate but i thought it might help u make a decision Running...

Its coming back. I once again raised the lights & will drop back EC because od the tips Either light stress or lockout I have the same strain under a different light and no problem there (same nutes, same EC + they are smaller and less light) What do yall think

u mad?

Have tou used Athena before?

Im in trash though means you're not sure? Sorry im not english native speaker

This is super useful. Ive been underestimating LEDs for a longer time now. I hope i learned this time 😅. Thanks! I'll keep y'all updated

I'll try another flush and lowering EC to 2.5 Also lowering light levels I also saw some clawing/knittering of upper leaves

Light levels are the same. This rooms progression is slower and not as extreme. It got bad after not watering enough (very high EC). Also showed tip burn and clawing. The problem is even after flushing with 0EC, the media gets back to the usual high 4-6EC after reintroducing fertilizer.