Tumbling Tom Leaves Dry & Crisp

[jha5j3b]

Hi Guys.

I've been growing tumbling toms from seed in a propagator.
After germination and a little growth I removed the lid.
They're on a windowsill in my conservatory.

Yesterday I noticed the first leaves and a couple of others at the top have curled/dried up.
I wondered if it was because they're still in the shallow base of the tray so I've re-potted into 9cm pots.

Am I in the clear or do I need to take further action.

[Greenleaves]

I would imagine thatyou have cooked them with sunlight