Going back to the beginning of this thread to see the pictures you posted, I agree that they were to say the least, very unhappy little campers when you received them. Not dead per se, but a good way there.
Some things I would have done differently:
- I never even use any chemicals on the roots. Especially peroxide is ver harsh on anything. I personally do not see the benefit, and it may well have done some harm
- I do not see any clay on the rootbals you showed in the pictures. So I think you have over-treated the roots. Next time, just put them in the ground and let them grow for a year. Then clean out the roots.
- Presing down on the soil between each handfullis only going to hurt the plants. You have such small plants here, there is no risk of air bubbels. The soil will compact sufficiently when watering. Air bubbels occur when you have larger roots, which prevent the soil from going all the way down. Think holes the size of ping-pong balls opr larger, not pebbel-size (I once thought my plant was potten properly. Started to work with a chiopstick and could put half a bucket of soil still in the container
In general: Less worry, and more let nature do its thing.