first time grow help with conditions

Chris - since i had a couple of failures recently and had to rethink and plan things out i did however have a small testing set aside

now i do agree that some plants really love the lower temps from about lowest at 68 to 70 and the high point being in about or around 76 to 80 - about a common average for most

the ones i have now at about 45 or 46 days old they look great but this was a kicker for me and caught it fast

for about the first 10 days after they got established from sprout ( about 2 weeks ) i did notice very dark green leaves and started to curl up - now during this the temp was about 71 to 73 with a humidity of about 43 %

i gave it a bit more heat thinking it was a bit low so it was then at about 75 to 77 and still with about same on humidity - this seemed t make it worse and looked like they were going to wither away if kept going as it was

so now heat not answer - now to cool it down - i got the temp down to about a steady 68 - things started to look better but still off - so i lowered again and now running at or about 58 to 62 and they are striving like the Fourth of July in May lol lol

humidity did fluctuate a bit before getting stable at about 46 to 48 % at all times - now this might be a good thing also to look out for with some strains - i have found that some like very cool temps to strive while others like the high heat

i did post a recent picture in the other forum post about Fox Farm Nutrients and will post here also

is it possible that i might have like a Afghani Kusch or along that line of lower temp plants ? - i do remember reading something about some liking the cooler temps from like 50 to 60 degrees

if look at the bottom just to the left there is one tiny plant that did not recover like i thought it has stayed about the same looking like over fed and over heat leaf curl

but the rest of them really look fantastic and this is only been one actual feeding per the FF schedule after a did a major Sledgehammer flush -

5 gal paint bucket with holes in bottom only

soil is 5 Lb of Nutrient free potting soil 1.5 Lb of Pete Moss 3 Lb of perlite 4 cups beach sand 6 to 8 cups broken up popcorn packing material and any or all stalks from old harvests

now this does hold very well in moisture from about 20 to 30 days or higher before next feeding -- original flush start was 3 gal of Sledgehammer and 1 gal of plain water planted on April 9th and did not do the first actual feed till May 17th

this one i keep at about steady about 58 degrees with a 38 to 40 humidity

now i am thinking i might have to jump the feedings or try to stay close to the schedule as possible at a more advanced nutrient plan combination - half veg and half flower even just might wing it from the hip lol lol

thanks to all and have great grows - Peace to all with Growers Luv

Changing it from 24/0 to 18/6 won't have a negative impact on it. There has been at least 1 study which shows 18/6 is better for the microbial population vs 24/0