My seedlings are 1.5 to 2" tall, and have a second set of true leaves. This picture show how the mix is washing away from the bottom, exposing the green tap root and little horizontal roots, too. I think I need some soil added, but I'd like your opinions.
Thanks!

Lennie,
Starting in the gritty type mix is fine, but you will notice that you will need to water them a little bit more, as you probably already are.
I have had them lean as yours are and it is not necessarily due to lack of light or not rotating seedlings.

I would be tempted to leave them in the pots that they are in and top dress with a 1/8" - 1/4" layer of grit to help hold them vertical, but not too much.
If you do repot, use the gritty mix. By what you stated that you used as a mix, you need to just add some coarse bark (reptile bark is what many use).
Hope this helps,
Rick

Thanks, Rick - I've taken your advice and top dressed with a thin layer of grit. I'll keep an eye out for reptile bark so I'll be prepared when I need to pot up to the next size. I'm glad to hear the leaning isn't due to lack of light. I'm watering every other day, since we aren't into summer temps yet they don't dry out quickly.
Lennie

Lennie,

Yes as Rick said leave them there, I use the same cups for my seedlings with very good results, but I use them as the second size pot, I start them in a 12" diameter cointainer all together and move them to these cups when they have at least 6 true leaves, in the picture is my biggest one, and planning to leave it there in this cup some more months, it has very few leaves because of the fungus problems I had but now is very healthy ( I can't turn the pic )

Roberto

There you go Roberto!!

Looks great!!!

Thought I'd help you.. ;-)

Laura

Thanks for the picture, Roberto and Laura for straightening it. It helps to see how big it can get in that size cup. I won't worry about potting up for quite awhile.
How old is this one? I can't imagine mine getting that big anytime soon.
Lennie

Laura,
Thanks for your help, since i got this tablet i rarely use the pc, and things like this sometimes become difficult on it

Lennie,
They should be from around last September or October, I give them a little ( maybe a lot ) of artificial light during the winter, some people say not to but i ve had good results
I bought last year some small plants on ebay from a name antique_trader84, they were around 8" to 10" at the moment and arrived on those size cups and the roots were all molded to the cup so they were growing there at that size