Gardening in Texas is unique. Gardening in North Texas is more unique still. Due to our climate, we have a very long growing season. I have plants in my gardens that start strutting their stuff in late February and don't fizzle out until the first frost. We can grow some colder climate plants and some warmer climate plants. The blazing summer temperatures set in about May and continue through September, so smart gardeners grow plants native to Texas that require little water.
Full sun in Texas does not mean the same thing as full sun in other parts of the country. Most full sun plants grown easily in other areas of the US need part shade in Texas. Plants that have "average" water needs for other parts of the country require extra water here in Texas. Gardening in Texas is an exercise in patience and perseverance. Almost everything I've learned has been through trial and error.