Oh the worries
I use to worry about initial germination, but after many trials during the winter months, just for fun, I finally figured out what works (for me at least)
I only start with 4 seeds of each variety (for tomatoes and peppers), since generally germination rate is 80% or better if done properly and the seeds are viable.
After one week, if there is no germination of one particular tomato variety (very rare, but has happened with some very old seeds), I re-seed those again, but give them 30min treatment of 50/50 bleach/water solution. Not only it kills possible pathogens, but actually softens up the seed shell dramatically, almost makes it translucent. And after that - germination is pretty much a guaranteed, at least a few...
Too cold, too dry, too wet... Everyone has their favorite methods and brands for seed starting mixes. I love Espoma Organic Seed Starting Mix. It has plenty of nutrients, has mycorrhizae, holds the moisture well, works for me. The only thing I add to the mix is Worm Castings. The difference with and with out them is rather dramatic
[img]https://i73.photobucket.com/albums/i230/duhvinci/2009_garden/seedlings_tests/11_15_2009_1.jpg[/img]
Starting seeds in the small cells (6/9 typical black cells where entire flat of 72 fits right into the 1020 tray makes it easy, and well organized seed starting... Once the cells are filled, I water them thoroughly, and let the trays sit and drain any excess for 2 days indoors, this way the mix not well moist, but not wet. Now I load the seed, and into the same 1020 tray with the lid and bottom heat (heating mat), regulated to the point where the germination chamber stays at 79-82F
[img]https://drphotography.smugmug.com/photos/1176693932_3ViBR-O.jpg[/img]
Once the seedlings have their first set of true leafs, I transplant them into 2.5' pots, also fitted into the same 1020 tray, neat, clean, organized and reused:
[img]https://drphotography.smugmug.com/photos/789405972_vata8-O.jpg[/img]
In a week, I water them with 1/2 strength fish emulsion, giving them just enough boost...
Two weeks later, these are pretty much ready for hardening off (if weather permits):
[img]https://drphotography.smugmug.com/photos/798168697_bQ9DN-O-1.jpg[/img]
Since I usually keep only one seedling per variety for myself, at this point, I will up-pot only what I need into 6" pots, the rest are give-aways, and stay in their 2.5" pots
I like using these trays/pots for few reasons:
Everything is a universal fit into the same 1020 trays, one 2"x4" light fixture covers 4 of those trays, and each tray holds 32 pots, that is plenty! 128 plants under one light fixture!
Everything stays well organized and neat
Easy to water from the bottom - just lift up the insert, poor one gallon of water into the tray, and place the insert with the plants back into the tray - done
Transporting 4 trays with 128 plants outside for hardening off (and back inside when cold) is so easy!
That's my story
Regards,
D