Curling Leaves

Firstly, I want to say I suspect overwatering but I want to confirm and get a solution if there is one.

To preface, I have two different vegging areas, one mini cab and a 3x3 tent. All 7 plants were germinated at the same time and only the 5 in the tent exhibit the leave curling (as well as stunted growth, as the photos will demonstrate.)

Here are the photos, the first three being of one plant in the tent, and the fourth photo being of the two in the cab. The only difference is pot size and type, where the ones in the cab are smaller smart pots and the ones in the tent are five gallon rigid pots.

Now I suspect the stunted growth might be due to overwatering as well as the larger pot size. Remember, these were all germinated at the same time and actually the two in the smart pots are two days younger than the rest which are now two weeks old as of today.

I almost forgot to mention, the soil and water are the same. For soil I am using a blend of roots organic with some promix, amended with lime, azomite, humic acid, myco, and a very small amount of uncooked super soil. Clearly the soil is not the issue, as the two plants pictured seem to be THRIVING. I am more than happy with their progress and hope to get the other five back on course!

Maybe some slight over watering, solution would be to water less....

The damn things take forever to dry out... I wish I just went with smart pots! They're so difficult to overwater. It's been a week now since I watered last and they're still quite heavy.

Would turning off my humidifier (humidity is at 40% with it on) and bumping up the heat (dialing down the fan) help or would low humidity (15-25%) and higher temps (80) be more stressful than a lack of oxygen for the root base? It's been a while for me here, so I apologize for my questions sounding quite clumsy.

i don't know what nutrients are in roots organic but that leaf twisting is classic nute overload

mandy1 said:

i don't know what nutrients are in roots organic but that leaf twisting is classic nute overload

Click to expand...

That would be really surprising as the other two in smart pots are in the same soil, are the same strain, and all seven have never received anything other than water. Roots organic is typically mild to hot from what I have read, so it was purposefully diluted with pro-mix in about a 60-40 roots to pro blend. The small amount of super soil I had left over from when I mixed it was maybe a gallon and a half mixed in with over 40 gallons of the pro-mix and roots organic. Given this, I'd be really shocked if it was a nutrient overload.

Could it be due to low levels of humidity? I have grown in this very same room before with the same strain (albeit they're all from seed) and never had any problems with the low humidity before, but I have seen some people mention humidity while researching this.

what is your temp? it looks like over watering to me but maybe your closet is staying chilly and less absorption going on?

Temp is a solid 70-73.

i had this mate get ur humidity up dial back the nutes a bit and water a little less even if u have to then water sooner coz its dry if its ur first grow always let ur pot go dry once or twice so u know what it feels like and know when to water id do this every time i swap medium water it let it get settled give it 3 days let it dry out check weight then u find it loves the nutes coz you have made it wait i had low humidty had same issue but did use a soil that wasnt light mix and added my newly popped seeds to it so wasnt sure if it was a bit high nutes too i wouldnt worry too much they looking ok and sometimes a first leafset or 2 ive noticed does this in some cases hope this helps. as a rule i find easier to overwater than under they tough little cookies also check ph of your water and its runoff