DF Archive

September Gardening To Do List

September Gardening To Do List

USDA Plant Hardiness Zone Map

Zone 1

* Sow wildflower seeds
* Water to winterize trees and shrubs
* Clean up vegetable and perennial gardens
* Plant spring-blooming bulbs
* Apply winterizing formula lawn fertilizer (with high potassium)
* Clean out greenhouse and sterilize bench tops
* Sow salad greens and make or buy a cold frame for frost protection
* Bring in bonsai, scented geraniums, poinsettias and Christmas cactus and set up grow lights if necessary
* Take cuttings of annuals and herbs for indoor rooting
* Clean off birdfeeders; clean out and put away birdbaths for the winter

Zone 2

* Prune tomato roots to hasten ripening
* Winterize trees and shrubs with deep waterings
* Dethatch and aerate lawns
* Sow salad greens and get the coldframe ready
* Clean up rose bed and apply fungicide one last time to mildew and blackspot prone varieties
* Harvest apples; put spoiled fruit in compost pile
* Clean off birdfeeders and restock with seed
* Deadhead chrysanthemum plants to prolong bloom
* Plant garlic for harvest next summer
* Sow wildflower seed for bloom next spring

Zone 3

* Divide peonies and other spring and summer-blooming perennials
* Plant perennials
* Plant bare-root and containerized trees and shrubs
* Sow wildflower seed for spring bloom
* Plant spring-blooming bulbs
* Dethatch and aerate lawns
* If September rainfall is scarce, water trees and shrubs to keep them supple and prevent winter damage
* Clean and restock birdfeeders
* Plant garlic for harvest next summer
* Set out bareroot peonies

Zone 4

* Harvest apples and store in a cool place
* Plant garlic
* Dethatch and aerate the lawn
* Clean out rose beds and apply fungicide one last time to susceptible varieties
* Plant perennials
* Move tender houseplants, etc. indoors after rinsing and repotting, and set up a grow light to supplement natural light
* Clean and restock birdfeeders
* Begin to move tropical water lilies and other tender aquatics indoors
* Plant spring-blooming bulbs; refrigerate those you intend to force
* Set out bareroot peonies

Zone 5

* Set out transplants of cool-weather vegetables
* Plant winter-hardy pansies and fall annuals (calendula, dianthus, ornamental cabbage and kale)
* Plant tag teams of perennials and spring-blooming bulbs that will complement each other or bloom in sequence next season
* Water trees and shrubs when rainfall is scarce to “winterize” them
* Dethatch and aerate the lawn
* Dehead chrysanthemum plants to keep flower buds forming through the fall
* Clean out rose beds; apply fungicide; leave hips for winter color and bird food
* Prune summer-bearing raspberries
* Mow back strawberry plants; remove weeds and remulch
* Move tender houseplants, etc. indoors after rinsing and repotting, and set up a grow light to supplement natural light

Zone 6

* Set out cool-weather vegetable transplants, including salad greens, broccoli, kale and cabbage
* Plant garlic and leeks
* Prune cane fruits such as raspberries and blackberries
* Plant winter pansies and fall annuals (calendula, dianthus, ornamental cabbage and kale)
* Plant tag teams of perennials and spring-blooming bulbs that will complement each other or bloom in sequence next season
* As tops die back, harvest potatoes, onions and garlic
* Plant peonies
* Plant fall-blooming bulbs to brighten up fading window boxes, planters and in drifts among ornamental grasses
* Continue to harvest herbs, grasses and flowers for drying
* Divide peonies, bearded iris and other spring- and summer-blooming perennials.

Zone 7

* Set out transplants of cool-weather vegetables
* Prune cane fruits such as raspberries and blackberries
* Plant winter pansies and fall annuals (calendula, dianthus, ornamental cabbage and kale)
* Plant peonies
* Plant fall-blooming bulbs to brighten up fading window boxes, planters and in drifts among ornamental grasses
* Continue to harvest herbs and flowers for drying
* Divide peonies, bearded iris and other spring- and summer-blooming perennials
* Plant bareroot trees and shrubs
* Order sweet pea seedlings for fall planting
* Plant herbs and groundcovers as the weather cools

Zone 8

* Plant bareroot trees and shrubs
* Order sweet pea seedlings for fall planting
* Set out second crop of tomato and pepper plants
* Sow seeds of green beans, squash, pumpkins and cucumbers
* Divide bearded iris and other overcrowded spring- and summer-blooming perennials
* Prune cane fruits
* Continue to harvest herbs and flowers for drying
* Sow seeds of perennials and keep soil moist if rainfall is scarce
* Start cool-weather vegetables from seed now or set out store-bought transplants later in the month
* Plant winter pansies and fall annuals (calendula, dianthus, ornamental cabbage and kale

Zone 9

* Order sweet pea seedlings for fall planting
* Plant fall- and winter-blooming perennial plants
* Prune summer-flowering shrubs and vines
* Plant winter pansies and fall annuals (calendula, dianthus, ornamental cabbage and kale) later in the month
* Deeply irrigate trees and shrubs every few weeks
* Plan for spring bulb gardens by seeking out specialty bulbs (species tulips, Dutch iris, anemone, ranunculus) that thrive in rainy winter, dry summer climates
* Groom and fertilize hanging basket and container plants to keep them thriving through the fall
* Sow cool-weather vegetable seeds
* Clean out rose beds and reapply fungicide to disease-prone varieties
* Sow seeds of perennials and keep soil moist if rainfall is scarce

Zone 10

* Order roses for fall planting
* Sow cool-season vegetable seeds
* Prune summer-flowering shrubs and vines after bloom
* Sow seeds of perennials and keep soil moist if rainfall is scarce
* Deeply irrigate trees and shrubs every few weeks
* Plant fall- and winter-blooming perennials
* Groom and fertilize hanging basket and container plants to keep them thriving through the fall
* Set out second round of tomato and pepper plants
* Sow seeds of green beans, squash, pumpkins and cucumbers
* Clean out rose beds, prune lightly and reapply fungicide to disease-prone varieties

Zone 11

* Sow seeds of desert wildflowers
* Groom and fertilize hanging basket and container plants to keep them thriving through the fall
* Sow seed of cool-weather vegetables
* Order roses for fall planting
* Set out second round of tomato and pepper plants
* Sow seeds of green beans, squash, pumpkins and cucumbers
* Deeply irrigate trees and shrubs every few weeks
* Clean out rose beds, prune lightly and reapply fungicide to disease-prone varieties
* Continue to harvest summer vegetables to encourage more fruits to form
* Build a compost pile for fall soil improvement

Leave a Reply