Help, plants are on the dry side!

I almost killed them around 10 days ago by using epsom salts and nutrients for foliar feeding while on a 24 hour flouro light cycle. After doing this, the leaves exploded and dried out. They have since recovered, although now I have installed a new 400 watt HPS light and have been using hydrogen peroxide and high nutrient levels which caused stunted growth and limping of the leaves, combined with the tops trying to dry out again.

What to do now? And what about the HPS light which causes a drop in humidity (more ac).

less is more my friend----an A/C will only drop the humidity lower-----I run a humidifier and A/C unit in my veg room..stay between 35 and 45%.

do you foliar feed when light is on, that will burn them

bonz said:

do you foliar feed when light is on, that will burn them

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Yes, so now I stay away from the top leaves. I bet it is even more important to not foliar feed the tops with the HPS light on!

definately will burn, do it at night and be carefull when they bud you could cause mold. i dont use epsom salt but i wouldn`t recomend it for foliar feed that is a salt i would think it would burn the leaves.
pic`s would help because it sounds like there is more than just folliar issues here, high nute level may mean your soil is locking up.

I wouldn't recommend foliar feeding with epsom salts at any point while the lights are on. By their nature the salts will absorb some of the water around them and form pockets on the surface of the plant. These pockets of salt/water will act like a magnifying glass and burn out whatever section they are on.

i dont know if i would actualy use epsom salts for any foliar. i dont know enough about it`s use but i would think that salts of any kind wouldn`t be good on the leaves i thought that was for the soil.

when you do foliar feed anything keep way from bud sites weather there is any or not, only fan leaves.top and bottom till they drip.

I removed the tallest plant and put it outside. One netpot held two plants, I split them. Here is how they look now. (My digital ph meter arrived today, so ph is 5.80 and nutrient solution is ~370 ppm. Also, I am using the floro). They look incredible, this is day 21

bonz said:

definately will burn, do it at night and be carefull when they bud you could cause mold. i dont use epsom salt but i wouldn`t recomend it for foliar feed that is a salt i would think it would burn the leaves.
pic`s would help because it sounds like there is more than just folliar issues here, high nute level may mean your soil is locking up.

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what system do you have there ebb and flow, drip irigation or what. how often do you change water? what did you put the one outside in soil?

bonz said:

what system do you have there ebb and flow, drip irigation or what. how often do you change water? what did you put the one outside in soil?

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Nutrient solution replacement average 4 days. Here are two pictures, bottom left and left foreground are of the one I cloned, removed and transplanted outside.