I think this has come up before, but I'd like to share a success and a
failure.
I transplanted a pot of supermarket basil to a 1 litre pot. It seems
to like a lot of water but I only water from below. There are a lot of
roots coming through the holes into the gravel beneath, which I keep
wet. The basil is about 1 foot high!

Coriander I just cannot keep. I buy a pot, cut some of the top leaves
and never get a second cutting.
Has anyone any advice?

Pam in Bristol