help before they die

[dutchmasters420]

I got 5 seedlings rihgt now in just potting soil under 4 23w flourescents in a rubbemaid, last night it was cold out and the heat was high and the room they was hot and i woke up and checked them adn a few curled up so the leaves were pointed straight to the sky, i put a fan in the box and its deffinetly not as hot but I see yellow blotches on them now, their only about a week old what could be wrong with them? Is it just the heat? here they were yesterday before the hot ass night. im about to get some after pics

 

[dutchmasters420]

I think i diagnosed my problem as overwatering and a lil heat stress but I'd deffintly want someone to confirm that. I've been water way to much for seedlings i think but the soil has been drying out it seems. Hopefully the coller temps,air flow and les watering should solve me problem.

 

[Lofty]

hope u get them sorted, post again if theres probs.

 

[Guest]

Looks like heat stress to me. Maybe overwatered but Im not sure on that. More likely this is related to heat. You really dont want temps more than 80 degrees with lights on. 71-75 are perfect. and 65-70 with lights off.

 

[LetUsC]

Looks like heat stress to me. Maybe overwatered but Im not sure on that. More likely this is related to heat. You really dont want temps more than 80 degrees with lights on. 71-75 are perfect. and 65-70 with lights off.

You can get away with higher temps with co2 though, right? I run about mid 82-90 F with lights on. Have co2 on for 15mins of every 90 mins in a grow closet.

 

[MTF-Sandman]

You can get away with higher temps with co2 though, right? I run about mid 82-90 F with lights on. Have co2 on for 15mins of every 90 mins in a grow closet.

Only if you maintain the saturation level of the CO2 and all of the other factors are in sync with the sped up metabolism...CO2 by itself is nearly worthless if the rest of the grow can't take advantage of it.

 

[Blackvelvet]

You should go ahead and start feeding the seedlings since true leaves are forming. Do this very weakly. Don't apply ferts in the water if your potting mix contained ferts mixed in at planting. When watering, apply so much that some comes out the bottom. Then allow to dry out pretty good. (Top 1/2 of the container dry) Florescent lights should be only 1 or 2 inches away from the tops of the seedlings.