When to plant the vegetables in Houston

Asparagus – Jan 15->Feb 15th
Beans ( lima and snap ) – March 1->April 7th and Sept 1->Sept 21

Beets – Feb 1->28 & Sept 21->Oct 15th
Broccoli – Jan 21->Feb21 & Sept 15th ->Oct 15th
Cabbage – Jan 21->Feb 21 & Sept 15th ->Oct 15th
Cantaloupe – Mach 21->Jun 30th
Cauliflower – Jan 21->Feb 21 & Sept 15->Oct 15th
Carrots- Oct 15->Nov 15th
Collards – Jan 21->Feb 15th & Sept 15->Nov 1
Corn – Mar 1->March 31
Cucumber – Mar 21->Apr 30
Eggplant – March 21->Jul 7th
Kohlrabi – Jan 21->Feb 28th & Sept 21->Oct 31
Lettuce – Jan 21->Feb 28th & Oct 7->Nov 30
Muskmelon or Watermelon – March 21->Jun 30th
Okra – Apr 1st->Jul 31st
Onions – Jan 15->Feb 15
Peas, snap – Sept 21->Oct 15th
Peppers – March 15->April 30th
Potatoes – Feb 1->Feb 15th
Pumpkin – Mar 15->Jul 15
Radish -> Feb 1 -> Mar 7th & Sept 1->Nov 15th
Southern peas – Apr 1->Aug 21
Spinach – Oct 1->Nov 15th
Squash/Zucchini – Mar 15th ->Apr 30
Sweet potatoes – Apr 1->Jul 15th
Swiss Chard – Jan 21->Feb 15 & Sept 21->Nov 7
Tomatoes – Mar 1->Mar 31
Turnip – Feb 1 ->Feb 28th

From:
http://herselfshoustongarden.com/2008/03/when-to-plant-the-vegetable-plants.html