My seedlings have sprouted up and I put them under my sodium light. I think my closet is getting to hot and I have no way to vent out the hot air.
ventilation is job #1 in any grow op. The ventilation system must be able to keep the room between 24-26C.
I was wondering if you think I could cut a hole at the top of my closet door and put an exhaust fan in.
yep, that's the first thing to do, the second is to assure cool air can easily enter the space so there's a throughflow.
I have an oscilating fan in the closet and the room is 2' wide 7' long and about about 8 1/2' tall. My thoughts on this is to put an exhaust fan in the upper corner on the other end of the closet away from oscilating fan.
yes, you need an osc fan too, but that alone will not only
not cool the room, the fan's motor will make the room air hotter. An osc fan is needed to build stem strength and circulate air around the leaves.
I plan on some way putting and exhaust hose on it some how to eliminate light leaking out.
You can make a serpentine light trap from cardboard or plywood:
How long should I soak rockwool one inch cubes and what should I do about getting excess water out before putting seedlings in cube?
Soak cubes in water adjusted to pH 5.0 for 24h and drain using a salad spinner before plugging stems or seedlings in them.
Also would it be alright to put them on a small plate and as the cubes dry out put a small amount of water on the plate for cubes and plants to get water.
NO! Because RW has a strong wicking action, this will keep cubes saturated all the time! See
https://www.rollitup.org/hydroponics-aeroponics/15030-batch-clones-rockwool.html for details on how to water seedlings or clones in RW cubes.
I am sick of screwing up these good seeds so please explain in laymens terms what I should do I can't afford to loose anymore seeds.
Sorry, I'm making this as simple as I can!
get some!
what's that?
and can't get any for a while but I do have guano a 1 gallon jug for veg. and it contains bat, seagull and worm castings.
Don't use organics in a hydro op. They are incompatible with H2O2.
I am reading a book how to grow great marijauna and in one place it says for seedling use 12 on and 12 off and then in another spot it says 18 to 24 hours.
Not such a good book. The first citation is wrong. Clones/seedlings should get 18-24h/day light.
I have taken the 2 seedlings out of grow room and put under small flouresent light not very powerful but plants are about 3" from light like I said it is not a very strong light.
As it should be! Seedlings and clones don't need to be pounded with light.
when should I transfer to hydro unit.
When they have a good spray of roots, they can be put in pots of your choice of medium:
