Try not to over think this one here. This plant is very strong and will do well in bad conditions. In fact, I believe that most marijuana is grown in bad conditions.
Honestly, they can hit soil now... These popped out of their rapid rooters, and after about 6 hours I transplanted them in to their initial pots. My lights are a few feet above them, but I have quite a few-
That, a little water from time to time, and a small fan will give me a super healthy shrub in a few weeks time.
Like I said man- Check for a tap root, and get it in to final pot. Unless you're dealing with super high temps or abnormal conditions, you're safe to get going with initial transplant.
Easy on the evaluations. I know it's hard man. Here's a long story short, from my initial growing logs: My first plants, I poked, prodded, attempted to diagnose, over-diagnosed, over-corrected, over stressed my plants, over stressed myself, and overall put way too much time and energy in to a tiny little seed. What made me realize this, was when I tossed a runt in the corner and ignored it for a week or two. What happened? The plant that I just let grow, shed all of it's whorled leaves and runtish attributes, while the ones I were attacking with "love" exhibited slow growth and major stress for a long while until I figured things out.
My two cents- Plant it- Set it- Forget it. When the water is bone dry an inch deep and bone dry *but* slightly moist 2-3 inches deep, water thoroughly. Set it- Forget it. Aside from your training associated with scrogging, you shouldn't have a whole lot to worry about.
A few tips for soil, as well:
-Overwatering is realllllllly easy. Underwatering is realllllllllly hard.
-If your temps are really high and your soil is drying unevenly, you can prevent this by putting a layer of hydroton on top of the soil. Make sure you rinse the hydroton prior to. I do it for plants that I intend to flower, as they grow really fast and efficiently in normal conditions, but it also helps it things are hot. You can see a couple in the photos with this being done to them. For my moms, I don't worry about it.
-Hefting is the *best* method for knowing when to water. Transplant, and wait for the soil to dry completely. Once dry, lift the pot to gauge the weight. Water through and lift again. Check the weight of the pot in a few days and you should have an idea of how fast things are moving in your rootzone. This might be hard in a scrog if you aren't cutting the screen loose.
Get that sucker out of there and grow! Hope this helps.