I am in hardiness zone 7.
January:
Plant cabbage -- January 15th to March 15th (60-80 days to maturity)
Plant carrots -- January 15th to March 20th (70-80 days to maturity)
Plant lettuce -- January 15th to March 1st (60-85 days to maturity)
Plant onions -- January 1st to March 15th (100-120 days to maturity)
Plant garden peas -- January 15th to February 15th (60-80 days to maturity)
Plant potatoes -- January 15th to March 1st (70-90 days to maturity)
Plant radishes -- January 15th to April 1st (25-30 days to maturity)
February:
Plant broccoli -- February 15th to March 15th (60-80 days to maturity)
March:
Plant corn -- March 15th to June 1st (80-100 days to maturity)
Plant tomatoes -- March 25th to May 1st (70-85 days to maturity)
April:
Plant pole beans (65-75 days to maturity)
Plant cucumber -- April 1st to May 15th (60-65 days to maturity)
Plant Okra -- April 1st to June 1st (55-60 days to maturity)
Plant southern peas -- April 1st to August 1st (60-70 days to maturity)
Plant peppers -- April 1st to June 1st (65-80 days to maturity)
Plant sweet potatoes -- April 15th to June 15th (90-150 days to maturity)
Plant bush squash -- April 1st to May 15th (50-55 days to maturity)
Plant winter squash -- April 1st to August 1st (85-90 days to maturity)
May:
June:
Plant corn -- June 1st to July 20th (80-100 days to maturity)
Plant Okra -- June 15th to July 1st (55-60 days to maturity)
Plant tomatoes -- June 1st to August 10th (70-85 days to maturity)
July:
Plant pole beans -- July 15th to August 10th (65-75 days to maturity)
August:
Plant broccoli (60-80 days to maturity)
Plant cabbage -- August 15th to October 1st (60-80 days to maturity)
Plant carrots -- August 20th to September 15th (70-80 days to maturity)
Plant cucumber -- August 20th to September 1st (60-65 days to maturity)
Plant potatoes -- August 1st to August 15th (70-90 days to maturity)
Plant bush squash -- August 1st to August 20th (50-55 days to maturity)
September:
Plant lettuce (60-85 days to maturity)
Plant onions -- September 1st to December 31st (100-120 days to maturity)
Plant radishes -- September 1st to October 15th (25-30 days to maturity)
October:
November:
December: