September Gardening Calendar

Wondering What You Should Be Doing In Your Garden?

Below is a calendar of key things you can be doing in your garden during the month of September.

September Gardening Calendar text on purple background with snapshot of downloadable calendar.

Approximate Dates & Gardening Activities:

  • September 2 - There's still time to plant early fall vegetables this week, such as tomatoes, peppers, zucchini and more...
  • September 4 - Pull summer flower varieties and begin planting fall flowers—many varieties in-store now!
  • September 6 - Use insect preventatives in early flowers and vegetables. 
  • September 8 - Start planting winter vegetables this week...
  • September 10 - Now's the time to plant iris starts and garlic bulbs.
  • September 11 - It's time to fertilize* your citrus.
  • September 13 - Rose care—clean up, light pruning and fertilizing*.
  • September 16 - Grow a lush winter lawn—start prepping for winter ryegrass seed.
  • September 18 - It's a great time to plant citrus!
  • September 20 - Landscape clean up and fertilization* of trees and shrubs. 
  • September 23 - Plant select seeds indoors for your fall/winter Tasty Garden.
  • September 25 - Winter Lawn—begin planting ryegrass seed once nighttime temperatures are a consistent 65° F.

* = Fertilize once temperatures are below 90° F. However, you can still support your plants during heatwaves with vital nutrients

Click the button below to download a PDF version of this calendar, for easy printing or larger viewing...


seedlings in biodegradeable pots in seed trays

September Planting Calendar

Plant the following edibles from 9/1 - 9/14:

  • Seeds: Snap beans, bok choy, broccoli, Brussel sprouts, cabbage, Chinese cabbage, carrots, cauliflower, celery, chard, collard greens, cucumbers, and endive
  • Transplants: Brussel sprouts, and cauliflower

Plant the following edibles from 9/15 - 9/30:

  • Seeds: Beets, bok choy, broccoli, Brussel sprouts, cabbage, Chinese cabbage, carrots, cauliflower, celery, chard, collard greens, cucumbers, endive, kale, kohlrabi, head and leaf lettuces, leek, mustard, green onions, parsnips, peas, radishes, rutabagas, spinach, and turnips
  • Transplants: Broccoli, Brussel sprouts, cabbage, Chinese cabbage, cauliflower, celery, chard, and head and leaf lettuces

To get the most out of your garden harvest, visit your local SummerWinds Nursery and let our Trusted Garden Advisors help you select the best vegetables and the right time to plant.  For additional tips, download the Maricopa County Garden Planting Calendar for Annual Fruits and Vegetables.

Pink hibiscus flower, two young girls relaxing on a nice lawn, Buddha's hand citrus fruit.

Want More?  Register for one of our FREE Learn ‘n Grow classes online!

Contact your local SummerWinds Nursery to learn more.

At SummerWinds, We Guarantee Success!