Cold weather ?

[Danks2005]

I started 5 new strains from seed, 29 plants total. I started them 3-4 weeks ago. They have been slow growing, all have yellowing, looks like deficiency of some sort. These are in Blazeoneup's soil mix. What I am wondering is if these cold ass temps could cause the yellowing, I know it can slow growth. There is no way I can mix up 29 different feedings, just need to keep em alive and flower, get a good idea of product, select keepers, then try to dial in. I am hoping when it warms up, if that alone will get them healthy/healthier.

P.S. quite a few of the stems going to the fan leaves are purple.

Nirvana's PPP
Thseed's Bubblegum
Serious' AK-47, and Chronic
Mr. Nice's Critical Mass

 

[hazy]

it could

 

[ibjamming]

I've got a few that literally froze...they were in temps in the low 20s with just their light for heat and are still runts. REALLY cold doesn't do them much good. I went ahead and started a few more seeds just in case they never come out of their funk. My plants are 2 months old and barely a foot tall. Try to keep them warm...it REALLY helps.

 

[Danks2005]

My plants are looking kind of rough, but all the new growth seems fine. Im just gonna try to push on through till I can get back to a mono crop. I just don't have it in me to run so many diff pheno's. I've always been impressed by multi strain grows.

 

[themoonismyfrnd]

My plants are looking kind of rough, but all the new growth seems fine. Im just gonna try to push on through till I can get back to a mono crop. I just don't have it in me to run so many diff pheno's. I've always been impressed by multi strain grows.

I have experienced this when there is about a >15 degree difference between night and day. Usually around the 20 degree mark. The new growth looks like a nitrogen def in reverse right? Lighter, yellower new growth starting near the petiole?

I suggest finding a creative way to add a few extra degress to the room. Seedling starter mats are good if you can get a buffer between that and the bottom of the plants. Straight contact would be too warm. Just a thought.

 

[Danks2005]

themoonismyfriend, you just described it to the TEE!!!, Im gonna try to get em off the cold floor today, as well as maybe a heater on a thermostat. Thanks guys.