Q.Will kousa dogwood trees grow in Texas
I just want to know if they will grow in Texas.

The USDA hardiness zone for Houston is 9a. Kousa dogwood is listed as hardy to zone 8. So there's a chance that it may too warm for them in Houston. However, I would check with the local County Extension Service for advice specific to your area. This link will help you locate your nearest office: https://www.gardeningknowhow.com/extension-search/
If you decide to try one, this article has some information to help you: https://www.gardeningknowhow.com/ornamental/trees/dogwood/growing-kousa-dogwood-trees.htm