Plant Nurseries & Garden Centers in Ontario, CA

Where to buy plants here

Where to buy plants in Ontario, CA: big-box vs. independent

Ontario, CA has 31 independent nurseries and 4 big-box garden centers in this directory's own classification. Independent, big-box, and grower are separate business-structure categories on file for each listing, not a ranking of one over another.

Independent, named

Plus 28 more in the listings below.

Big-box, named

Plus 1 more in the listings below.

Growing conditions

USDA hardiness zone: 10a
Avg. minimum winter temp: 30°F

Frost is rare here (about 360 frost-free days a year); most years see little or no hard freeze.

What's plantable right now

Frost is rare here, so timing follows temperature rather than frost dates. September's average temperature at the nearest weather station is about 78°F.

Warm-season crops to plant now

Artichoke · 120–130 days to maturity
Arugula · 40–60 days to maturity
Basil · 14–75 days to maturity
Bell Pepper · 70–80 days to maturity
Cantaloupe / Muskmelon · 57–90 days to maturity
Cleome (Spider Flower) · 70–80 days to maturity
Cosmos
Cucumber · 50–70 days to maturity
Eggplant · 60–95 days to maturity
Fig
Four O'Clock
Lemongrass
Lima Beans · 65–95 days to maturity
Marigold
Marjoram
Morning Glory
Okra · 55–60 days to maturity
Pole Beans · 60–70 days to maturity
Pumpkin · 100–120 days to maturity
Rosemary
Snap Beans (Bush) · 50–60 days to maturity
Summer Squash · 30–50 days to maturity
Sunflower
Sweet Corn · 60–90 days to maturity
Sweet Potato · 95–150 days to maturity
Tomato · 60–85 days to maturity
Watermelon · 62–85 days to maturity
Winter Squash (Butternut) · 45–100 days to maturity
Zinnia · 56–84 days to maturity
Zucchini · 30–50 days to maturity

Planting-window , , , , , , , , , , , , , , , , , , , , , , , , , , . sources: Clemson Cooperative Extension, Home & Garden Information Center Clemson Cooperative Extension - Home & Garden Information Center Clemson Cooperative Extension Home & Garden Information Center Clemson Cooperative Extension, Home & Garden Information Center Colorado State University Extension Colorado State University Extension, Colorado Master Gardener Program Clemson Cooperative Extension Home & Garden Information Center Clemson Cooperative Extension Home & Garden Information Center Clemson Cooperative Extension Home & Garden Information Center Clemson Cooperative Extension Home & Garden Information Center Clemson Cooperative Extension Home & Garden Information Center Iowa State University Extension and Outreach (Yard and Garden FAQ) Iowa State University Extension and Outreach (Yard and Garden) Missouri Botanical Garden (Kemper Center for Home Gardening / gardeninghelp.org) University of Missouri Extension NC State Extension NC State Extension NC State Extension Publications NC State Extension Gardener Plant Toolbox NC State Extension Gardener Plant Toolbox NC State Extension Gardener Plant Toolbox Purdue Extension (Dept. of Horticulture and Landscape Architecture) University of Minnesota Extension Utah State University Extension Utah State University Cooperative Extension Virginia Cooperative Extension, Virginia Tech and Virginia State University

Planting windows and crop timing here are computed from USDA/NOAA climate data and the university extension sources cited below, not a site visit or soil test. Treat this as a starting point: local conditions vary, and a local nursery or extension office can advise on your exact site. See our full Disclaimer.

Map data © OpenStreetMap contributors.

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