Independent
DebBee's Garden
4.8 ★ (222 Google reviews) as of 2026-08-06
3919 E 120th Ave, Thornton, CO 80233
Licence: not checked, no CO registry held
Plant Nurseries & Garden Centers in Thornton, CO
Where to buy plants here
Where to buy plants in Thornton, CO: big-box vs. independent
Thornton, CO has 2 independent nurseries and 2 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
Big-box, named
Growing conditions
- USDA hardiness zone
- 6a
- Avg. minimum winter temp
- -10°F
- Median frost dates
- First ~Oct 11 · Last ~May 2
Frost dates: NOAA 1991–2020 Climate Normals, nearest station (NORTHGLENN, CO US, 5.1 km away) .
What's plantable right now
Based on this ZIP's median frost dates, last frost ~May 2, first frost ~Oct 11.
Direct-sow now
- Basil · 14–75 days to maturity
Planting-window sources: , Clemson Cooperative Extension, Home & Garden Information Center , Colorado State University Extension, Colorado Master Gardener Program , NC State Extension .
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.
Big Box
Big Box
Garden Center at The Home Depot
3.8 ★ (5 Google reviews) as of 2026-08-06
16420 Washington St, Thornton, CO 80023
Licence: not checked, no CO registry held
Independent
Lyn's Flowers and Garden
4.6 ★ (54 Google reviews) as of 2026-08-06
11040 Colorado Blvd, Thornton, CO 80233
Licence: not checked, no CO registry held
Big Box
Big Box
Walmart Garden Center
3.3 ★ (24 Google reviews) as of 2026-08-06
9901 Grant St, Thornton, CO 80229
Licence: not checked, no CO registry held
Planting calendar
The full year, at a glance
Number of crops in our table with an open planting window each month, computed from this ZIP's median frost dates.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Start indoors | 1 | – | 12 | 6 | – | – | – | – | – | – | – | – |
| Direct-sow | – | – | – | 17 | 15 | 2 | 1 | 1 | 1 | – | – | – |
| Transplant | – | – | – | 4 | 17 | – | – | – | – | – | – | – |
| Fall planting | – | – | – | – | – | – | – | – | – | – | – | – |
Keep looking nearby
Nurseries near Thornton
- Northglenn, CO (2.1 mi)
- Westminster, CO (5.3 mi)
- Broomfield, CO (6.3 mi)
- Commerce City, CO (8.1 mi)
- Brighton, CO (8.8 mi)
- Lafayette, CO (9.3 mi)
- Erie, CO (10.1 mi)
- Arvada, CO (10.9 mi)
- Louisville, CO (11.0 mi)
- Wheat Ridge, CO (11.8 mi)
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