Plant sturdy, dark green transplants in a sunny spot and in an organically enriched, well-draining soil. Plant deeper than originally grown to encourage development of a strong root system that will in turn encourage good production. As the plants become established, water deeply. Mulch with organic material such as compost or leaves. This helps retain soil moisture and keep weeds down.
Tomatoes are heavy feeders.
In addition to enriching the soil with organic matter prior to planting, periodic applications of fertilizer are needed for maximum yields. Cage your tomato plants just after transplanting to keep them off the ground and away from damage and disease as they grow. Should an early fall freeze threaten, wrap the cages with row cover or a sheet to create a greenhouse for each plant. In the back corner of my son's garden, we found a small tree loaded with green fruit that looked like apples, but we were not aware that apples grow in Houston. However, that's what they are, and they are very tasty.