is a 15 litre container big enough for one spinach plant.
isowed seeds of spinach in a shallow container 20 centimetre deep.it says to thin them out .....does it mean to leave in the container the future plants....that means they stay in a shallow container....or.....i can transplant the big(10 centimetre high.) will it succed?

I'd think you could put 4 or 5 spinach plants in a 15 liter container, David. They don't have really deep roots and I usually thin them to about 25 or 30cm apart.

You could leave some of the others in the shallow container, and just use those ones up first. Still thin them gradually (use the baby leaves for salad!) until they are far enough apart to let them get big.

thanks alot