Hey guys,
I need some help. I have 4 great white shark seeds growing under a 400 Watt HPS bulb with two blizzard fans going. All of the plants look fantastic besides one. It is about 2 feet from the light but some of the higher leaves are yellowing and curling up around the edges. They are crispy and will crumble if u touch them. My first guess is heat stress but the temp in the room is about 80 degrees F and i have two fans on high pointed at them. Am i not watering enough? I cant put pics up right now my camera is broken! please help asap!

sounds like a heat problem. 80 is pretty warm for these girls, you need to get it to 75 or below. Also might want to check the run off PH.

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Disclaimer: I do this purely for medicinal purposes.
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good advice or if the ph is ok and 80 isnt extreamly hot it may be an overwatering problem

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http://www.rollitup.org/grow-journal...izzard-21.html

This may help http://www.rollitup.org/view.php?pg=...article&id=171

__________________
Disclaimer: I do this purely for medicinal purposes.
CLICK HERE FOR MY 400W/HPS HINDU KUSH GROW LOG!

overwatering/over ventilation/limited freshair/ph 6.5 for soil 5.6 for hydro

i use a spray bottle to water and i water the soil until the top is wet. but if i move a little off the top of the soil its dry thats why i thought i was underwatering. also the water evaporates quickly because its alot of light to a small amount of plants. what do u guys think
?

it depends how small ur plants are if theyre small they dont need soil AND leaf waterings
i stick to my answer above
u also need more info
soil how u water it (is there stem rot) like dat

no theres no stem rot. the plant is growing very healthy. all the leaves are healthy besides 4 of the leaves edges. its about a foot tall and very bushy. i usually water the leaves lightly and then pour 100 ml of water around the base of the stem. i water them once a day. is that too much or too little?

Water when you can't find any damp soil with a fingertip, or maybe spend 10 bux and get a moisture meter. Your watering method is rookie. Water thoroughly when you do water, until it starts running out of the drain holes. Occasionally take a stick (bamboo skewer?) and aerate your soil (like tenderizing a steak) to encourage even moisture and complete watering.
Then drain well. Any more than twice a week would indicate (to me) that there are other things needing adjustment, like heat, wind velocity, etc.

I don't think most experienced growers run their surface fans on HI? Wind-burn is possible and a constant strong breeze tends to dry out what it's blowing on. I thought the object was to run the fan between the lights and the top of the growth, to reduce ambient heat.

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I'd giva ya everything I got . . . for little piece of mind

thank you very much that helps alot