What Grows in Walnut, CA?
Walnut, California is in USDA Hardiness Zone 10a.
Zone
Last frost
First frost
Frost-free days
Walnut is in USDA Zone 10a with about 330 frost-free days.
What to plant, and when
Timing by your frost dates — last frost rare frost, first frost rare frost.
Tomato, Cherry Tomato, Bell Pepper, Chili Pepper, Cucumber, Zucchini, Eggplant, Pumpkin
Beets, Swiss Chard, Collard Greens, Mustard Greens
Green Beans, Potato, Sweet Potato, Corn, Microgreens, Rosemary, Oregano, Strawberry
What grows well in Walnut
Tomato
Grows well
Cherry Tomato
Grows well
Bell Pepper
Grows well
Chili Pepper
Grows well
Cucumber
Grows well
Zucchini
Grows well
Green Beans
Grows well
Beets
Grows well
Potato
Grows well
Sweet Potato
Grows well
Corn
Grows well
Eggplant
Grows well
Swiss Chard
Grows well
Microgreens
Grows well
Pumpkin
Grows well
Basil
Grows well
Rosemary
Grows well
Oregano
Grows well
Strawberry
Grows well
Watermelon
Grows well
Fig
Grows well
Lemon Tree
Grows well
Avocado
Grows well
Mango
Grows well
Banana
Grows well
Olive
Grows well
Sunflower
Grows well
Collard Greens
Grows well
Mustard Greens
Grows well
Lemongrass
Grows wellFrequently asked questions
What hardiness zone is Walnut, CA in?
Walnut, CA is in USDA Hardiness Zone 10a. This drives everything about what you can reliably grow — it maps directly to how cold your winters get.
When is the last frost in Walnut?
The average last spring frost in Walnut is around rare frost, and the first fall frost is typically rare frost. Plan to move tender plants outside after rare frost and have them harvested (or protected) before rare frost.
What grows well in Walnut?
Plenty — Walnut's USDA Zone 10a climate supports 30+ crops. Some of the easiest and most reliable here are Cherry Tomato, Chili Pepper, Cucumber.
How long is Walnut's growing season?
Walnut typically has around 330 frost-free days per year (roughly rare frost to rare frost). That's a full season — plenty of time for most annual vegetables plus a succession or fall crop of cool-season greens.
What should I plant first in Walnut?
Go with fast-maturing crops to get a quick win while the season is short: Microgreens, Basil, Mustard Greens are among the quickest from seed to harvest in Walnut.
Can I grow vegetables in containers in Walnut?
Yes — Walnut's climate is container-friendly for the right crops. Tomato, Cherry Tomato, Bell Pepper all do well in pots, which also lets you start them a little earlier and move them in on cold nights.
When should I start seeds indoors in Walnut?
For warm-season crops like Tomato, Cherry Tomato, Bell Pepper, start seeds indoors 6–8 weeks before your last frost (around rare frost), then transplant after the danger of frost has passed.