Here’s a zone-by-zone to-do list for the month of September.
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To-Do List for Zone 9
Plant winter lettuce, peas, carrots, cole crops, and Asian greens.
Harvest winter squash and pumpkins before frost, when their skin is hard enough to resist pressure from your thumbnail.
Set out transplants of calendula, primroses, larkspur (Consolida ambigua), snapdragons, bachelor's buttons (Centaurea cyanus), stock (Matthiola incana), and pansies.
Refrigerate spring bulbs for 6 weeks to plant later this fall.
Pick ‘Bartlett' pears for ripening indoors, but allow Asian pears and ‘Seckel' pears to ripen on the tree.
Protect grapes from birds and wasps by covering the ripening clusters with brown paper lunch bags.