Warm summers and manageable winters give Hartley gardeners strong growing potential.
Enter your address to see what grows on YOUR land
Quick Facts
USDA Zones
6a-7b
Last Frost
Jan 15 - May 15
First Frost
Oct 1 - Dec 31
Town Area
4K acres
Hardiness Zone Range
Growing Season
What Grows in Hartley
Plants suited to California's climate and zones 6a-7b.
Growing Challenges in California
Drought is a persistent challenge — irrigation is essential in most regions
Wildfire risk affects rural and foothill properties
Adobe clay soils in valleys drain poorly without amendment
Wide climate variation means plant selection is highly location-specific
Environmental Intelligence
Understanding what's nearby helps you make informed decisions about where and how to grow.
Total Sites
855
Risk Level
Elevated
Primary Concern
1 Superfund NPL site
Sources Checked
Severity Distribution
Highest-Severity Sites
CALIFORNIA STATE PRISON - SOLANO
PFAS Sampling · PFAS Detected
CALIFORNIA WATER SERVICE CO.-TRAVIS AFB
PFAS Sampling · PFAS Detected
CITY OF VACAVILLE
PFAS Sampling · PFAS Detected
WICKES FOREST INDUSTRIES
Superfund · SUPERFUND (NON-NPL)
006N001E05A001M
Nitrate Monitoring · Well
Know Before You Grow
- •Raised beds with imported soil can reduce exposure risk near brownfield sites.
- •Underground tanks can leak petroleum products. Soil testing near former gas stations is recommended.
- •Test well water for nitrates if you rely on a private well. Levels above 10 mg/L require treatment.
Check your specific parcel in Hartley
Get exact proximity distances to contamination sources for your specific parcel — plus soil, sun, drainage, and 1,112 plant recommendations.
25+ data sources analyzed in seconds
Your Specific Parcel Matters
Hartley Average
- ●USDA Zones 6a-7b
- ●Generic soil type for the area
- ●State-average frost dates
YOUR Parcel
- ✓Your exact hardiness zone
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure from LiDAR
See MY Growing Report
Read your specific parcel in Hartley
Pull a site-specific report for your exact address in Hartley, California — soil, sun, drainage, frost risk, and scored plant recommendations.
25+ data sources analyzed in seconds
Key Growing Facts for Hartley, California
- USDA Hardiness Zones: 6a-7b (USDA PHZM 2023)
- Last Spring Frost: Jan 15 - May 15 (NOAA 30-Year Climate Normals)
- First Fall Frost: Oct 1 - Dec 31 (NOAA 30-Year Climate Normals)
- Land Area: 4K acres (US Census TIGER 2025)
- FIPS Code: 0632340
Zone data: USDA ARS Plant Hardiness Zone Map 2023. Climate data: NOAA NCEI. Boundaries: US Census TIGER/Line 2025.
Frequently Asked Questions
What hardiness zone is Hartley, California?
Hartley is in USDA hardiness zones 6a-7b, according to the USDA Agricultural Research Service Plant Hardiness Zone Map 2023. Zones are based on average annual extreme minimum temperatures from 1991-2020 weather data.
What vegetables grow in Hartley?
Hartley's zones 6a-7b support a range of vegetables. Common options for California include Avocado, Meyer Lemon, Tomato, Grape, Fig. For site-specific recommendations scored against your parcel's soil, drainage, and sun data, use the Growable Ground report for your address.
What is the growing season in Hartley?
The growing season in Hartley follows California's frost window: last spring frost around Jan 15 - May 15 and first fall frost around Oct 1 - Dec 31, based on NOAA 30-year climate normals (1991-2020). Frost dates vary by elevation and microclimate.