Using coco, but this form seems more appropriate than the hydro form.

What is your experience level? (first timer, novice, experienced...) Noob (first grow)

Your Equipment:
.1) Type and wattage of lights. (MH, HPS, CFL's, tube fluorescents, LED's) T5 Florescent 4-2ft tubes in fixture
.2) Distance from tops? 4-6 inch
.3) Reflector type? (cool tube set-up, bat wing, enclosed reflector, bare bulb...) built-in (fixture)
.4) Is there a consistent fresh air supply? Maybe not -- it's in a closet
.5) Do you have an exhaust fan and a circulation fan? Just added a fan today to move the air around
.6) What are the bulb wattages, kelvin ratings, and schedule? 4x24W tubes, 6400K, 18/6 schedule

Your medium:
.7) Specific brand and type of soil, (coco, peat based soilless...) and anything you've added to it. (vermiculite, perlite, worm castings...) CocoTek "big block" coco coir, mixed approximately 80/20 with perlite
.8) Size of container. Solo cup
.9) Did you use peat pucks (or similar) to root clones or germinate seedlings? No - germinated in paper towels

Your nutrients and water:
10) Source of water? (tap, bottled or filtered) What's it's ph before adjusting? Tap water. pH is about 7.0 before adjusting
11) Method of checking water ph. (ph pen, test strips, aquarium test kit...) Liquid drops
12) Method of adjusting water ph. (phosphoric acid, white vinegar, hydrated lime, PH Up...) ph Down
13) Specific brand and N-P-K ratio for each bottle. List dosages (quantity per gallon) and current feeding schedule. No nutes at all yet - just water
14) How often are you watering between feedings, and how much per watering? Have been watering every 2-3 days, but see below
15) Any additives or tea's? (Superthrive, CalMag, molasses, Mother's Earth...) None
16) Are your ph levels stable, or do they fluctuate? Seem stable
17) What is your ingoing water's ph? ...your runoff ph? ~6.0 ingoing, haven't tested runoff
18) Do you foliar feed? If so, with what, how often, and at what time do you spray? No

Your growroom:
19) Indoors or outdoors? Indoor
20) What size of closet, room or hut? 3x3x6 ft tent inside 9x4x8 ft closet
21) What are the temps and humidity levels while lights are on? ...With lights off? Haven't checked, but temps aren't extreme at all.
22) Have you seen signs of insects in the growroom? No

Your strain:
23) What strain are you growing? (Indica dominate or Sativa dom?) White Rhino (Indica dominant, I think?)
24) From seeds or clones? Commercial seeds
25) Is this an autoflower strain? No

So, here's the problem...

First seeds (2) were germinated 15 days ago. Germination seemed to go fine. Planted both in separate Solo cups with a 80/20 (or so) mix of coco/perlite. One of the plants grew a bit, then kind of stopped growing. The other one barely grew at all (and has since died; the result of an attempted transplant that was a bad idea anyway). I now have a 3rd plant going, so there are two under the lights.

My concern is that once planted, they grow a bit than stop (or slow way down). Here's a picture of plant #1 after two weeks:
Attachment 290275
It hasn't changed much in the last week and should be a lot further along. (Right?)

No nutes yet, just pH adjusted tap water. This is probably bad voodoo, but I pulled the two plants out a couple days ago to see the roots, and #1 looked like this:
Attachment 290276
Seems like the roots are growing great; why no leaf growth? I put that one back in the Solo cup and it still seems fine today - 2 days later, but still no real growth above ground.

I'm thinking overwatering? Seems like this coco mix never dries out (drainage is fine, but even after a couple days, the cups are still "heavy"). But I also don't have much ventilation in there. Tent has a carbon filter and fan, but haven't used that, and I keep the tent open anyway. So, I quit watering 2 days ago and added a fan to circulate the air just an hour ago.

Any thoughts? Plan so far is to water a whole lot less and get some air moving.
Token LaRoche Reviewed by Token LaRoche on . My turn - Stunted growth? Using coco, but this form seems more appropriate than the hydro form. What is your experience level? (first timer, novice, experienced...) Noob (first grow) Your Equipment: .1) Type and wattage of lights. (MH, HPS, CFL's, tube fluorescents, LED's) T5 Florescent 4-2ft tubes in fixture .2) Distance from tops? 4-6 inch .3) Reflector type? (cool tube set-up, bat wing, enclosed reflector, bare bulb...) built-in (fixture) .4) Is there a consistent fresh air supply? Maybe not -- it's in Rating: 5