Growing in cold frames!

Here in Texas, if I wait until April (after the last frost) to set my tomato plants out, the early summer heat arrives so soon, my fruit production is reduced. If I plant out in early March, we still have a few killing frosts which require covering the seedlings at night. I usually start seed germination near the end of December and allow the plants to grow pretty large on a light table before I set them outside to harden off and plant.

This year, I plan on constructing a wood/clear plastic cold frame on one of my 4'X8' raised beds with a thermostatically controlled heater in the cold frame. I also plan on starting my germination earlier in December. My hope is to get my plants larger and to the blooming stage before planting them out after the last killing frost in early April.

I've noticed in past years that plants with a few small blooms still set fruit on the early blooms after transplanting. If you see any holes in my plans, please advise.

Ted