I apologize for this delayed reply to your gardening question. The spring rush has brought a deluge of questions and we are working hard to catch up!
I am not sure I can tell what the growing situation is that you are describing. You may need to build raised planting beds for better drainage. The following web site offers suggestions for plants to use in Texas coastal areas.
Thanks for the question. Best wishes for a wonderful gardening season. Please stop in again soon!
Q&A Library Searching Tips