Actually if he is in the Philippenes then it is the height of the summer there as they are below the equator. Growing outside shouldn't be an issue other than heat. If you can get good soil that is definitely important. If you are outside of the city and you can't get good comercial soil, you can go out into the forest area and dig up some nice soil from beneath areas of decaying leaf debris. This soil will have nice microbial activity for breaking down the compost material. The downside of that is that there can be plant eating pests as well.