When is the best time to plant a garden in north Texas, and how is it achieved in very sandy soil?
How to Grow a Vegetable Garden in Very Sandy Soil
Certified GKH Gardening Expert
As for when to plant vegetables in your area, this guide should help you with that: https://aggie-horticulture.tamu.edu/archives/parsons/earthkind/ekgarden14.html
As for the soil, adding compost is the quickest way to amend the soil, which improves its fertility. This article will help you with that:
You may also want to consider the use of raised beds. I would fill the raised beds with compost or a good mixture (about 50%) of compost or other organic material and your native sandy soil.
If your going to plant a garden in sandy soil, then it would be wise to add
compost. here are some things needed to help improve the quality of your sandy soil: 1. newspaper, about 3-4 peices
2. compost from the garden like old garden plants, rotton fruit or veggies, ect. (note: don't add to much rotton food, as this will attract nasty bugs to your garden.)
3. mulch: manure or grass clippings will do.( no seed grass)
4. good quality topsoil
mix all this together and your ready to plant!!