Boise City's moderate climate supports a wide range of vegetables, fruits, and perennials.
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Quick Facts
USDA Zones
5a-6b
Last Frost
Apr 15 - Jun 15
First Frost
Sep 1 - Oct 15
City Area
55K acres
Hardiness Zone Range
Growing Season
What Grows in Boise City
Plants suited to Idaho's climate and zones 5a-6b.
Growing Challenges in Idaho
Short growing season at higher elevations
Arid conditions require irrigation in most of the state
Cold winter snaps can reach -30F in mountain valleys
Environmental Intelligence
Understanding what's nearby helps you make informed decisions about where and how to grow.
Total Sites
2,065
Risk Level
High
Primary Concern
7 Superfund NPL sites
Sources Checked
Severity Distribution
Highest-Severity Sites
Antimony No. 2
Mining Sites · Occurrence
Antimony No. 2
Mining Sites · Unknown
ARMY NATIONAL GUARD ORCHARD COMBAT TRAINING CENTER RANGES
Superfund · SUPERFUND (NON-NPL)
Blizzard
Mining Sites · Unknown
CAPITOL WATER CORP
PFAS Sampling · PFAS Detected
Know Before You Grow
- •Test well water for nitrates if you rely on a private well. Levels above 10 mg/L require treatment.
- •Underground tanks can leak petroleum products. Soil testing near former gas stations is recommended.
- •Raised beds with imported soil can reduce exposure risk near brownfield sites.
Check your specific parcel in Boise City
Get exact proximity distances to contamination sources for your specific parcel — plus soil, sun, drainage, and 1,112 plant recommendations.
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Your Specific Parcel Matters
Boise City Average
- ●USDA Zones 5a-6b
- ●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 Boise City
Pull a site-specific report for your exact address in Boise City, Idaho — soil, sun, drainage, frost risk, and scored plant recommendations.
25+ data sources analyzed in seconds
Key Growing Facts for Boise City, Idaho
- USDA Hardiness Zones: 5a-6b (USDA PHZM 2023)
- Last Spring Frost: Apr 15 - Jun 15 (NOAA 30-Year Climate Normals)
- First Fall Frost: Sep 1 - Oct 15 (NOAA 30-Year Climate Normals)
- Land Area: 55K acres (US Census TIGER 2025)
- FIPS Code: 1608830
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 Boise City, Idaho?
Boise City is in USDA hardiness zones 5a-6b, 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 Boise City?
Boise City's zones 5a-6b support a range of vegetables. Common options for Idaho include Potato, Apple, Hop, Cherry, Lentil. 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 Boise City?
The growing season in Boise City follows Idaho's frost window: last spring frost around Apr 15 - Jun 15 and first fall frost around Sep 1 - Oct 15, based on NOAA 30-year climate normals (1991-2020). Frost dates vary by elevation and microclimate.
More in Idaho
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