Welcome to ATP, savingsmom!
You can find the ATP planting calendar under "Goodies" in the far-left-hand blue menu bar.
Then click on "Garden Planting Calendar"
Enter your zip code or city.
But Deb is very right! besides quirks of climates that sometimes over-ride the first and last frost dates, your particular micro-climate may add or subtract a few weeks. If there is some crop that you know very well, compare the Calendar's suggestion for that crop against what you know is right. then you might need to look for a slightly warmer or cooler ZIP code.
If it is the first year you've planted some crop, you might sow defensively. Don't aim to be the EARLIEST gardener in your block to get fresh whatevers - pick a safer date. Or start 1/2 of your seeds 1-2 weeks early, and the other half 2-3 weeks late.
