what gardening zone is boise idaho

What Gardening Zone is Boise, Idaho In?

Boise, Idaho, primarily falls within USDA plant hardiness zone 6b and 7a. This means the average minimum winter temperature in Boise ranges from -5°F to 10°F, influencing the types of plants that can thrive there year-round.

Understanding USDA Plant Hardiness Zones

The USDA Plant Hardiness Zone Map is a valuable tool for gardeners. It divides North America into zones based on average annual minimum winter temperatures. These zones help gardeners determine which plants are most likely to survive the winter in a particular location.

Boise’s Specific Gardening Zones: 6b and 7a

Boise’s location in southwestern Idaho gives it a unique climate, straddling zones 6b and 7a. Zone 6b experiences average minimum winter temperatures between -5°F and 0°F, while zone 7a sees average minimum winter temperatures between 0°F and 5°F. The specific zone within Boise can vary depending on elevation and microclimates.

Impact on Plant Selection

Knowing your gardening zone is crucial for successful gardening. Choosing plants rated for zones 6b or lower ensures they can withstand Boise’s winter temperatures. Similarly, plants rated for zones 7a or lower will typically thrive. While you can try planting species suitable for warmer zones, be prepared to provide extra protection during harsh winters.

Microclimates in Boise

Even within Boise, microclimates can exist. South-facing slopes, urban areas surrounded by buildings, and sheltered locations can be slightly warmer than exposed areas. This can allow you to grow plants rated for slightly warmer zones, but monitoring temperatures and providing protection is still recommended.

Gardening Tips for Boise

• Amend your soil: Boise’s soil is often alkaline and can benefit from the addition of compost and organic matter.
• Water wisely: Boise’s climate is dry, so water deeply and less frequently. Consider using drought-tolerant plants.
• Protect from frost: Even hardy plants can benefit from protection during unexpected late-spring or early-fall frosts.
• Choose the right plants: Select plants that are suited to Boise’s climate and soil conditions. Consult with local nurseries for recommendations.

Frequently Asked Questions

What are some plants that grow well in Boise’s gardening zones?

Many plants thrive in Boise. Some examples include lavender, coneflowers, sedum, various types of shrubs, and fruit trees like apples and cherries.

Where can I find out the specific gardening zone for my address in Boise?

You can use the USDA Plant Hardiness Zone Map online. Enter your zip code for a more precise determination.

Does Boise get a lot of snow?

Boise does receive snow, but it doesn’t typically stay on the ground for extended periods. The foothills surrounding Boise receive more snowfall.

What are some common gardening challenges in Boise?

Common challenges include alkaline soil, dry climate, and potential for late and early frosts.

Can I grow tomatoes in Boise?

Yes, tomatoes can be grown in Boise, but it’s essential to start them indoors or purchase transplants and provide protection from frost early in the season.

Summary

Boise, Idaho, is primarily in USDA plant hardiness zones 6b and 7a. Understanding these zones is essential for selecting plants that will thrive in the local climate. While microclimates can exist, choosing plants appropriate for zones 6b and 7a is generally a safe bet for successful gardening in Boise.