Exercise caution and use your best judgment before ordering during unusually hot or cold weather (below 32 degrees F, or in excess of 95F for shipping purposes), as these extremes may leave your plant vulnerable to damage. The optimal time for planting for most of our material is in mid to late spring, past the danger of hard frost. Please refer to our preferred shipping and planting guide for your area below. Fall Zone 2, 3, 4: Early September. Zone 5: Early to Mid September Zone 6: Mid September Zone 7: Mid to Late September Zone 8, 9, 10: Late September to Early October Spring Zone 3, 4: Early to Mid May Zone 5: Late April to Early May Zone 6: Mid to Late April Zone 7: Early to Mid April Zone 8: Late March to Early April Zone 9, 10: Late March