Hi All. Im having problems in my tent with leaf burn. got a 240 x 120 tent with 2 x 600 w lights and 8 inch extractor and 12 inch fan. got top shade leafs going yellow in the middle and crisping at the ends. temps are between 20 c to 31 c. lights are 50 cm above canopy of sgrog net. Any advice welcome.

Ive been growing with nft for several years now with great success. But on my last grow when i switched to 12/12 i didnt set the timer properly. After three weeks there was no sign of flowers. So i made sure that my lights were coming on and going off at the correct times. A week later still no signs of flowers and when i checked the timer i had left one of the digits up so i was getting 15 minutes of light in the middle of the dark cycle.(thats not wearing my glasses when i switched.) This resulted in a shit yield of very small buds. So this time i decided to grow in pots with all mix for a change as i wanted to keep a mother plant. On Monday i bought somemore all mix and transplanted 13 plants into 10l pots and upped the grow to 2mil a liter. They were looking perfect and nice and bushy from fimming. On Wednesday i gave them another fim and noticed a couple of nuit burns on the leaves of two of the plants, but put this down to splashes when watering. Yesterday i went into the groom and there were more nuit burns on several of the plants. I hadnt allowed for for the nuits already in the all mix. So i imeadiately put them in the sink and flushed them out with plain water. The ec run off went off the scale of my trunchoen. So i flushed untill i got the run off down to 1.2 bearing in mind my ec background is 0.6. These plants were grown from fem seeds and are on the 3rd week of veg under 3x600w lights So my question is do you think they will pull through and be alright??

can some one on here please help me? i am i first time grower and i got given some super skunk auto seeds, every thing was going well till about 4 days ago, my plants have gone a yellow colour and have got brown tips all of the new leafs comeing threw have died off what did i do wrong and how can i fix it ??

So opened up to feed today and was greeted to see my plants going yellow mostly on the bottom leaves. I haven't trimmed them at all and they are getting pretty bushy so I'm hoping this problem is an easily solvable one e.g. giving it a trim or maybe water less/more. I water about once every 3 days and my watering cycle goes like this. (day 1. nutes, day 4. nutes, day 7. nutes, day 10. Ph'd water 6.5-ish) here's pics of the problem, advice would be appreciated if you know what the problem is.

Hello, I have been having problems with p.m on this run and although it is under control my question is when i harvest will the p.m continue to spread whilst the buds are drying? or because the plant has been chopped and therefore dead does that mean the p.m is dead? I am worried that the p.m will continue to spread before the buds are dry and cured. i am sure someone out there will have a answer for me. Thanks Josh77