The Green Thumbers
3030 Brady St, Davenport, IA 52803
Business information on this page (including hours, address, phone number, rating, and licence status) is provided for reference only. Some fields carry their own as-of date; others may be older than they appear. Contact the business directly to confirm current information before visiting or purchasing. See our full Disclaimer.
4.5 ★ (361 Google reviews) · as of 2026-08-06
State-licensed in IA as of 2026-08-04 , source registry · how we verify this
Growing conditions
- USDA hardiness zone
- 5b
- Avg. minimum winter temp
- -15°F
- Median frost dates
- First ~Oct 22 · Last ~Apr 19
Frost dates: NOAA 1991–2020 Climate Normals, nearest station (ROCK ISLAND L&D 15, IL US, 2.3 km away) .
What's plantable right now
Based on this ZIP's median frost dates, last frost ~Apr 19, first frost ~Oct 22.
Plant for fall now
- Beets · 55–65 days to maturity
- Broccoli · 65–80 days to maturity
- Brussels Sprouts · 40–50 days to maturity
- Cabbage · 70–85 days to maturity
- Collards · 32–72 days to maturity
- Kale · 50–70 days to maturity
- Kohlrabi · 50–65 days to maturity
- Mustard Greens · 25–50 days to maturity
- Radish · 20–35 days to maturity
- Spinach · 40–60 days to maturity
- Turnip · 50–60 days to maturity
Planting-window sources: , Clemson Cooperative Extension Home & Garden Information Center , Clemson Cooperative Extension Home & Garden Information Center , Colorado State University Extension , University of Missouri Extension , NC State Extension , Purdue Extension (Dept. of Horticulture and Landscape Architecture) , 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.
Nearby nurseries
- Vander Veer Conservatory Davenport, IA 0.5 mi away
- Vander Veer Botanical Park Davenport, IA 0.6 mi away
- Flowers By Jerri Davenport, IA 0.9 mi away
- Hy-Vee Lawn & Garden Davenport, IA 1.2 mi away
- Colman Florist Inc. Davenport, IA 1.9 mi away
- Hy-Vee Lawn & Garden Davenport, IA 2.2 mi away
Frequently asked questions
- What type of business is The Green Thumbers?
- The Green Thumbers is classified as a dealer in Davenport, IA.
- Is The Green Thumbers state-licensed?
- Yes, The Green Thumbers appears in IA's state nursery/dealer licensing registry, as of 2026-08-04.
- What USDA growing zone is The Green Thumbers in?
- The Green Thumbers (ZIP 52803) is in USDA hardiness zone 5b, with an average minimum winter temperature of -15°F.
- What's plantable near The Green Thumbers right now?
- Based on ZIP 52803's frost dates, this is a good time to start 11 fall crops. See the full list above.
Source: State-licensed & Google Business Profile. Last checked 2026-08-06. See something wrong? Request a correction or removal →