I always mention varieties in my posts because the proper vegetable variety for our Houston climate is important. Of course, good soil, proper drainage, and sufficient sunlight and water are still the most important success factors. A lot of varieties will do at least reasonably well. Choices seem to almost unlimited; Reimer Seed lists 350 varieties of tomatoes for which they stock seed. A number of these are novelty types that I don’t waste my time with, but still! Unfortunately, some of the proven varieties of vegetables for the Houston vegetable garden are being discontinued. Why? Our local seeds sources such as Porter & Son have gone out of business. We now must rely on a diminishing number of national suppliers. These companies sell varieties that work well in most of the country but may not do so well here. They do not bother with the more specialized needs. A good example is Merced tomatoes, the best hybrid tomato that I have ever raised. I used the last of my seed this year and have not been able to find a seed source.
I recently saw an article in the San Antonio Express by the local extension agent about the dilemma of seed not been available any more for recommended varieties of vegetables for Texas gardens. It is an interesting read.
How to choose varieties? Of course, first read my posts! Bob Randall’s book gives his considerable experience. TAMU Extension Service gives their recommendations and the Chronicle gives recommendation for some more common vegetables. These sources are a good starting point, but around the Houston area we have surprisingly large climate and soil variations. Individual gardens will also vary. The best gardening advice is to experiment and find works best for you.