I just want to know if they will grow in Texas.
Will Kousa Dogwood Trees 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