The bottom is swelling but no root nubs yet.

Inflo on my orange passion ! !!

Seedlings of orange special :) 3 week olds

Leona hoke rooting well . Her leaves are starting to pop up ;)

Rooting duke.

Family picture . Lol! This is only half LOL

And just for fun here's my avocado tree only about 4 weeks old !

Root system of avocado tree.

Wow! Great start to the year.
Are your seedlings three weeks old from planting the seed, or three weeks old from sprouting? My three week old seeds (planting date) are half that size.

I think there a little over three weeks not exactly sure . But these did sprout really fast.