Hello

We just bought this plant and would like to plant it in the ground-
1) can you identify this tree?
- it's small berries are green (young) and red (old) and are edible (very sour)
-the leaves are green and not smooth- although there aren't any hairs or spikes on them
-the flowers are tiny and pink

2) Anyone know how the root system is? Aggressive? Deep? Spreading?

3) General care and maintenance? Water? Soil? Fertilser?

4) We live in Malaysia which is tropical with 27-33C daily.

Thank you!

Zara