I have grown two before and only watered them once a month or once a week for the first year per an expert. I lost one whose roots were eaten by a gopher and died. This one I grew in a container to replace it. I can't remember if I water it once a month or once a week until it is sufficient (one year). Then it is self-sufficient unless there is a draught. No need to water it the expert told me. Any advice? Also, how do I protect it from goffers. We live in Texas.
You can gauge by the amount of rain you get as to when to water it. Young trees need about 1 inch of water a week till it is established. Wilting leaves are an indicator it needs water. Here is more on its care:
https://www.gardeningknowhow.com/ornamental/trees/golden-raintree/golden-raintree-information.htm
http://texastreeid.tamu.edu/content/TreeDetails/?id=54
https://extension.okstate.edu/fact-sheets/tree-planting-guide.html
can this tree survive in a container, in hot sun
Golden raintrees are popular trees for home landscapes so you shouldn't have trouble finding one at your local garden centers. If not, the nursery would probably order one for you or you can order one online from a reputable garden nursery. (We don't make specific vendor recommendations.)
The prefer full sun, but if you plan to grow it in a container you would need to keep upsizing the container as they can grow from 25 to 40 feet tall. It would perform better inground. Here is more on its care:
https://www.gardeningknowhow.com/ornamental/trees/golden-raintree/golden-raintree-information.htm