Go he http://www.internetbonsaiclub.org

Do a search on Serissa foetida & you will be flooded with advice. Where are you
keeping it? It likes cool temperatures, good light, moderately high humidity,
and to be outdoors all summer. don't overwater it. Water only when the soil
starts to get dry. If you are anywhere south of South Carolina, it can be
outdoors all year round.

Thank you for the information. I keep it on my kitchen windowsill,
which faces north. I live in the UK, so it is too cold in the winter
to keep it outdoors but I put it out last summer.