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I need some advice on nutrient feeding in an ebb and flow hydroponic system. At what point is my plants strong enough to feed on the mild growth stage on the nutrient feeding schedule (include plant height,age,etc.). I am starting my plants on a 400 watt metal halide tomorrow, they are in 2-20...

My state has a House Bill to legalize the medical use and cultivation of cannabis. There is a group of people who strongly support this bill and they are collecting signatures. I was just wondering that if I signed the petition will I be investigated or anything like that? Please respond because...

how long does it take for a young plant to recover from overall nutrient deficiency?

I have 4 seedlings in rockwool starter cubes. 2 of them are working on their set of three leaves but all of the sudden today the leaves are a slight yellow green and the seed leaves are fully yellow. I water 3 times a day because the rockwool cubes dry out fast. maybe i am overwatering but idk...

what is the best fleuro tube for clones include lumens and kelvin please it is a 20 watt 2 ft light i have. thank you

when should i expose my seedlings to 400 watt metal halide? they are under full spectrum fleuroscent right now and almost one week old.

seedling has been only 1 cm for 2 days now and the leaves have not even folded up if I have been over fertilizing what should I do? any help appreciated

I have 5 seedlings all different sizes almost a week old and i was just wondering how long everyday i should run the fan on the low setting. thanks.

I have a pack of rockwool starter cubes and i recently planted my seeds in them. The rockwooll starter cubes already come with a hole in them and they are pretty deep (about .5") and when i planted my seeds I might have dropped one of them too far down but idk not more than .5 an inch. So is...

I know about ph up and down but I kinda need to do it with something I already have now.

When should I give my seedlings light? I have a full spectrum fluorescent light for them but i dont know when I should expose the seedlings to the light.

I own an active aqua 160 water pump and I am going to make a hydroponic system but I am not 100% sure what size black vinyl tubing to get. It says 5/16" but noone sells that size tubing. It came with a tube like piece but I dont even know how to attach it. It also says 1/2" and I guess that is...