It's September! What's On My Gardening "To Do" List?
- Alyce Peterson
- Aug 30, 2025
- 2 min read
Updated: Sep 27, 2025

Yes, summer flew by. Here in Zone 9, we have wonderful weather in late summer, early fall. It's a great time to work in the garden. Here are some key activities to focus on:

Vegetable Garden
Plant cool-season crops: lettuce, spinach, kale, arugula, beets, carrots, peas, radishes, broccoli.
Remove spent summer crops to free up space and reduce pests.
Start garlic, shallots, and onions toward the end of September.

Flowers & Ornamentals
Plant winter annuals: pansies, violas, snapdragons, calendula, dianthus, stock.
Divide and replant overgrown perennials (daylilies, irises, agapanthus).
Light prune roses; reduce feeding as they prepare for dormancy.
Trees & Shrubs
Plant new fruit trees, grapevines, and shrubs while soil is warm.
Prune lightly to remove dead or crossing branches.

Vineyard & Orchard
Harvest grapes, figs, apples, pears, late peaches.
Clean up fallen fruit to deter pests.
Fertilize citrus one last time this season.

General Maintenance
Control weeds before they go to seed.
Apply mulch to regulate soil temperature and conserve moisture.
Deep water trees and perennials early in the month; reduce irrigation as nights cool.
Compost summer plant debris with fall leaves.
Prepare soil with compost for fall/winter crops.

Pollinator & Wildlife Support
Leave some sunflowers or zinnias to go to seed for birds.
Plant late-season bloomers (cosmos, salvia, Mexican sunflower) for bees and butterflies.
These are just a few helpful tips to keep you on track with your September garden. Most importantly, take time to enjoy your garden.



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