Help please

[Pullsit]

Ok, so my plants are almost three weeks old and I just put the MH light on them about a week ago. The bottom leaves on two of em are turning yellow and dried out. I moved the light to about 16 inches thinking they are just too hot and it didn't make a difference. Everything above the first set of leaves is fine. I am planning on putting a fan on them and moving the light back down but will that be enough? Is that even a possible problem?

Pullsit Reviewed by Pullsit on 09-13-2010. Help please Ok, so my plants are almost three weeks old and I just put the MH light on them about a week ago. The bottom leaves on two of em are turning yellow and dried out. I moved the light to about 16 inches thinking they are just too hot and it didn't make a difference. Everything above the first set of leaves is fine. I am planning on putting a fan on them and moving the light back down but will that be enough? Is that even a possible problem? Rating: 5

[bobjob4u]

how big is the light? watts?

[Pullsit]

250 watts. and I also transplanted them about 3 days ago. I have 4 of em for now till I can sex em in about 14x24 enclosure.

[bobjob4u]

100 watt mh in a 15"x15" space over 12 seedlings. At about 16" above runs temps at dirt level at about 85-90. With cooled ventilation i can achieve temps in the mid 70's. So watch how close you get them to light, and get some air movin. Also what did you transplant into? type soil. At 3 weeks any light nutes being added yet?

[Pullsit]

I am using Miracle Grow moisture control, put em into 1gollon pots. They are about 6-7ish inches tall. I am diluting to just under 50% concentration miracle flowering plant fert. I just started doing that about two days ago and I am planning on doing it like every two waterings for now. Too much?

[bobjob4u]

your plants like to dry out almost all the way between waterings. Make sure that moisture control mg. Doesnt keep roots to moist. Only water when soil is dry. You can tell when cointainer feel much lighter when you pick um up. Is your mg fertilizer npk rating 15-30-15? If so 1/4 strength every other watering. Inless there is fertilizer already in your mg soil. Then hold off atleast every 2-3 waterings. Gallon contianers at proper temps should only need watering once a week. But they will need to be transplanted into bigger containers when you are ready to flower.

[Pullsit]

Ok, so the MG fert. is 20-20-20. Should i use the 1/4 concentration at 2-3 waterings still?

[Pullsit]

There is the time release fert. in the soil already

[bobjob4u]

I would just give em water for now. See how they are looking in a few weeks. Then 1/4 strength. Also when you flower try to get a fert with lower nitrogen. That would be the first number. example 9-15-30. In the past using soil with fert . I have burned plants and to much nitrogen late into flowering isnt good. Plus all that fert taste nasty. Flush with water last 2-3 weeks. And read as much as you can you will pick alot up here..

[Pullsit]

Thanks a lot, I really apreciate it!
I'll update here and hopefully have some pics worth putting up