Here’s a helpful site: Texas Tree Selector which asks you to either an express search or a custom search, then you select your county. I chose “Express” thne “Harris county” then “medium” and got four nice choices in medium sized trees, each with a link to more information. The site is by Texas A&M Forest Service.
On a commercial site, Houston Garden Centers and many pages of shrubs to plant now, starting on this page. And the navigation to the left holds many more pages of planting advice including trees, palms and shrubs.
Who needs shopping next Friday after Thanksgiving when you could be doing yard work!