what plant zone is boise idaho

What Plant Zone is Boise, Idaho In?

Boise, Idaho primarily falls within USDA plant hardiness zone 6b and 7a. These zones indicate the average minimum winter temperatures an area experiences, which helps gardeners and landscapers determine which plants are most likely to thrive there.

Understanding Boise’s plant hardiness zone is crucial for selecting plants that can withstand the region’s winter climate and flourish throughout the growing season. This information can help guarantee successful planting and help people to plan their gardens better.

Understanding USDA Plant Hardiness Zones

The USDA Plant Hardiness Zone Map divides North America into zones based on the average annual minimum winter temperature. Each zone represents a 10°F range. This map is a valuable tool for gardeners, providing a standard way to compare different climates and choose appropriate plants.

Boise’s Specific Zones: 6b and 7a

Boise’s location in southwestern Idaho results in a mix of zones. Zone 6b experiences average minimum winter temperatures between -5°F and 0°F, while zone 7a sees temperatures between 0°F and 5°F. Microclimates within Boise can also affect the specific zone of a particular location. Areas closer to the Boise River or sheltered by buildings may experience slightly warmer temperatures, shifting them towards the higher end of the zone.

Factors Influencing Boise’s Plant Hardiness

Besides the minimum winter temperature, other factors contribute to plant hardiness in Boise. These include elevation, soil type, sun exposure, and precipitation. Boise’s elevation (around 2,700 feet above sea level) and semi-arid climate influence the types of plants that can thrive.

Choosing Plants for Boise’s Climate

Selecting plants rated for zones 6 and lower guarantees they can survive the coldest winter nights. Plants rated for Zone 7a are also generally safe bets. Some popular plants that thrive in Boise include:

• Lavender
• Daylilies
• Coneflowers
• Russian Sage
• Many varieties of ornamental grasses

Frequently Asked Questions

What happens if I plant something outside of my zone?

Planting outside your zone increases the risk of plant damage or death during the winter. Plants not hardy enough for the minimum temperatures may suffer from frost damage, root rot, or complete die-off.

How can I find out the specific plant zone for my neighborhood in Boise?

You can use online plant hardiness zone finders or consult with local nurseries and garden centers. These resources often provide more specific information based on your exact location.

Does Boise’s plant hardiness zone affect the type of vegetables I can grow?

Yes, it does. While many vegetables are annuals and grown during the warmer months, some may benefit from season extension techniques like row covers or greenhouses to protect them from early or late frosts.

Are there any microclimates in Boise that affect plant hardiness?

Yes, microclimates exist. South-facing walls can provide extra warmth, while areas near bodies of water or in sheltered locations may experience slightly milder temperatures.

Where can I buy plants appropriate for the Boise plant zone?

Local nurseries and garden centers in Boise are the best places to purchase plants that are suited for the local climate and soil conditions.

Summary

Boise, Idaho, is primarily in USDA plant hardiness zones 6b and 7a, meaning that minimum winter temperatures typically range from -5°F to 5°F. Understanding these zones is crucial for choosing plants that can survive Boise’s winters and thrive in the local climate. Consider local factors like microclimates and soil type to further optimize your plant selection and garden success.