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can anyone please tell me why the cotyledon are curling?? is it a bad sign? i am using ro water water temp 65-68 / room temp 73F / humidity 50%

my ph is showing yellow (like piss).. i guess that's about ph 6~ i have 10 gal res and general hydro brand ph down. how much do i add per gal? the instructions say "use only to lower ph of nutrient solution and fertilizers" can i still use it for plain water? my tank has no nutes yet (plants...

you can't use h2o2 with organ nutes because the h2o2 is like an acid and kills the nutes..

it's used mostly in hydro.. controls bacteria/alge growth in the water, adds oxygen to water and im not sure what else it does.

turn lights on for 12 hours then turn them off for 12 hours, then repeat. that's how you do it lol.

i posted the exact question a couple hours ago: https://www.rollitup.org/marijuana-plant-problems/172100-how-does-seedling-look.html does it look like that? mines is 3 days old and hasn't grown much after it sprouted. first day it grew an inch, then next day no change in height or 3rd day...

so what does the cotyledon curling mean?? light too close so they are moving away from it? but that can't be the case the 2 true leaves arent curling.

also what is the best temp for seedlings at this stage?

could be nute burn, when did he start giving it nutes.. if he gave it to them when they were <1 week then that's the problem. if not then probably overwatering.

i have tons of cfls... after they get more leaves i will add more but right now i curious about the stem and optimal reflector height without stunting growth.

healthy? popped out 3 days ago. stem is redish/dark purple, is that bad? it's ice i got from nirvana. i have a 26watt cfl with a 10 inch reflective dome about 7-8 inches from it. is that ok for now? the reflector really does push the light onto the seedling, will they stunt the seedling growth?

i have more cfls, maybe i will add Y splitters to all the fixtures to double the lighting lol.. right now their all 6500k cfls i plan to throw a few 2700k when they get bigger. this is my first grow and my goal is to get as much bud mass as possible from 3 plants.. i need tips though, but i...

i have 3 ice plants which i plan to grow with 20-25 cfls and 250watt MH/HPS light. 2 of the seedlings i started 2-3 days ago and the one on the far left about 5 days ago. the room is about 40 inches x 30 inches x 5ft height. how big should i let them get before flowering? currently i have a...

if i am on veg stage would it help if i add some 2700k cfls? when i flower i would do the opposite, use some 6500k. i was thinking of trying a 2:1 cfl ratio. there are no scientific info on mixing spectrum to improve growth, or does it not make a difference.. curious

i traced the lid with a compass and scored the lid with a utility a few times, then applied to pressure, the cut-out popped out and perfect round hole. also easier to make a few different size holes without needing a different hole saw for each hole. a saw is maybe easier but i didn't feel...

my rockwool does not fall apart and stays in cube form even when soaked. so my question is: do you remove the plastic wrapper around the cube? my cubes are surrounded by hydro rocks and i wonder if i will get more roots coming out the sides of the net pots if i remove the plastic around the...

i bought the technoflora starter kit which is like $40 and had everything you need from veg, flower, to cloning nutes.. i haven't started using it, but i read some decent stuff about.

uhm the smell of weed growing isn't a harmful pollutant. a regular air/hepa filter won't remove the odor. you need to use carbon filter or UV lighting/Air purifier to remove the smell.

ok it's hard to tell when rockwool needs water or has too much water for seedlings. i figured it would seems simpler to weigh the cubes to tell if they need water and less chance of error for me. i used 2" inch cubes. dry they are 8 grams and after watered, 48 grams. the surface of the cubes...

mylar bounces back 90%+ of light. no way in hell the whitest walls can do that...