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Look at the dates to maturityLook at the dates to maturity on the back of the seed packet and back up from there. But note that seeds can not be planted any earlier than the time when your soil temperature has reached 55 to 60 degrees F.

2015 Special Edition Garden GuideCooking Fresh with The Old Farmer's AlmanacThe Almanac Monthly Digital MagazineWhat the heck is a Garden Hod?