[hongrui]

if you particularly are looking for cps, then i'd say not to waste your time, what you can get in singapore, you can get in malaysia. and its probably cheaper in malaysia too. otherwise you can try posting on GCS that you are holidaying in singapore and see if anyone has any cps for sale that you might not be able to get in malaysia.

but if you mean nurseries for plants in general, you can try world farm at bah soon pah road (at sembawang), woon leng at lim chu kang, mandai orchid garden at mandai. there are also stretches of nurseries along thompson road and also along Kovan road.