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Are 4 plants that are 100cm heigh at harvest (750g per meter strain) able to deliver 8oz under 250w hps in soil but only 0.33 squate meters grow otherwise perfect conditions?

I have 60x60cm box with 130cm of plant grow space. Running now hps 250w aircooled so reflector is at less than 90f . Growing in soil. 81F when on 70F off. Mylar walls 12 litre pots. foliar feed in veg. 4 plants marketed at 600g per sq meter but wont grow more than 4 plants. made over 2 oz under...

have a look yourself does sativa flowers just look like that? 2 weeks ago i would say its male, now i just dont know what to think (obviously it's got female flowers but why those small ones look so weird).

my timer failed to turn off light 2 weeks into flower. pistils ware already showing up. I've turned light off 3.5 hours late when I realized timers fault. What to do now? a)keep light off for next 12 hours and basicaly change cycle timing so it fits this accidental new shedule b) keep lights...

5 week into flower (out of 9), plant loosing fan leaves, young leaves and the one surrounding tops are starting to get affected too. Though its a heat stress (30+ C) but problem persist week after fixing it. I do add epsom salt to every watering and give nutes (4-2-6 tomato fertilizer) on every...

My plant shows heat stress I guess. I left it for 1 week and my termometer was showing max temp at 35C but need to double check tonight. Normally I would water it every 3 days but this time it keep moist for whole week. Old leaves are curling and yellowing but feel normal to touch/ not soft. Ph...

This is picture of early female am I right?

Don't know yet if its a problem or not. My plant is a Flying Dragon one month old under 250W blue CFL(20k lumen). Got it burned about a week ago as it was only 5cm/2inch away from lamp. Those 250W lamps give loads of heat. Its planted in medium made out of 1/2 indoor plant compost and 1/2...