I have a standard Bay tree in an earthenware pot. At the beginning of the spring, it was looking jaded and leaves going yellow and so I repotted it in new soil. I trimmed the rootball so that I could get it back into the pot along with a lot of fresh soil. It has now got all green leaves but they are not the dark glossy green that I would want to see. I rarely water the pot, only doing it if the weather has been dry and the pot looks as though it needs water.

I have a twenty foot tall Bay tree growing in the garden in the same soil. We are on chalk. The big tree is exactly as you would expect a healthy Bay tree to look, in fact I am going to have to lop it a bit soon.

What can I do to improve the poor potted one?