Boise, Idaho Planting Zone: A Guide to When to Plant What

Boise, Idaho is located in USDA plant hardiness zone 5b. This means that the average annual minimum temperature in Boise is between 20 and 25 degrees Fahrenheit. This climate is ideal for a wide variety of plants, including trees, shrubs, flowers, and vegetables. However, it is important to note that some plants may not be able to tolerate the cold winters or the hot summers in Boise.

In this article, we will discuss the different plant hardiness zones in Idaho, as well as the specific plants that are well-suited for each zone. We will also provide tips on how to care for your plants in Boise’s unique climate.

So if you’re planning on planting a garden in Boise, or just want to learn more about the city’s climate, read on!

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Zone	USDA Hardiness Zone	Avg. Annual Temperature
5b	-20 to -10 degrees Fahrenheit	37.4 to 42.8 degrees Fahrenheit
6a	-10 to 0 degrees Fahrenheit	42.9 to 47.8 degrees Fahrenheit
6b	0 to 10 degrees Fahrenheit	47.9 to 52.8 degrees Fahrenheit

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Boise’s Climate

Boise, Idaho, has a semi-arid climate with hot summers and cold winters. The average annual temperature is 45.6F (7.6C), with highs in the 90sF (32C) in the summer and lows in the 20sF (-7C) in the winter. The average annual precipitation is 16.5 inches (420 mm), with most of it falling in the spring and summer.

Average Annual Temperature and Precipitation

The following table shows the average annual temperature and precipitation for Boise, Idaho:

| Month | Temperature (F) | Precipitation (inches) |
|—|—|—|
| January | 30.3 | 2.3 |
| February | 34.7 | 1.7 |
| March | 41.3 | 2.2 |
| April | 50.3 | 2.5 |
| May | 60.0 | 2.2 |
| June | 69.3 | 1.8 |
| July | 77.3 | 0.9 |
| August | 76.5 | 0.8 |
| September | 69.0 | 1.2 |
| October | 57.0 | 2.0 |
| November | 43.7 | 2.4 |
| December | 34.3 | 2.3 |

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Growing Season Length

The growing season in Boise, Idaho, lasts from about April 15 to October 15. The average frost-free days are 140.

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Hardiness Zone

Boise, Idaho, is located in USDA hardiness zone 5b. This means that the average annual minimum temperature is between 10F and 20F (-12C and -6C).

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Plants Suitable for Boise

The following plants are suitable for growing in Boise, Idaho:

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Trees

• Apple trees
• Apricot trees
• Cherry trees
• Crabapple trees
• Elm trees
• Fir trees
• Maple trees
• Oak trees
• Pecan trees
• Pine trees
• Plum trees
• Poplar trees
• Willow trees

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Shrubs

• Azaleas
• Blueberries
• Bush honeysuckle
• Camellias
• Clematis
• Forsythia
• Hydrangeas
• Lilacs
• Roses
• Rhododendrons
• Spireas
• Viburnums

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Flowers

• Annuals
• Biennials
• Bulbs
• Perennials

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Vegetables

• Beans
• Beets
• Carrots
• Cucumbers
• Eggplants
• Lettuce
• Melons
• Peppers
• Potatoes
• Squash
• Tomatoes

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Fruits

• Apples
• Apricots
• Cherries
• Grapes
• Peaches
• Pears
• Plums
• Raspberries
• Strawberries

Boise, Idaho, has a diverse climate that supports a wide variety of plants. With careful planning, you can grow a beautiful garden in any part of the city.

What Zone Is Boise Idaho For Planting?

Boise, Idaho is located in USDA hardiness zone 5b. This means that the average annual minimum temperature in Boise is between 20 and 25 degrees Fahrenheit.

Planting Tips for Boise

When choosing plants for your garden in Boise, it is important to select plants that are hardy to the local climate. Some good choices for Boise gardens include:

• Perennials:
• Astilbe
• Columbine
• Daylily
• Iris
• Peony
• Rose
• Shasta daisy
• Yarrow
• Annuals:
• Begonia
• Marigold
• Petunia
• Zinnia
• Vegetables:
• Carrots
• Cucumbers
• Lettuce
• Peppers
• Tomatoes

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How to Plant

When planting in Boise, it is important to:

• Choose a site that gets full sun or partial shade.
• Prepare the soil by digging a hole that is twice the width and depth of the plant’s root ball.
• Add compost or organic matter to the soil to improve drainage and fertility.
• Water the plant thoroughly after planting.

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How to Care for Plants

To care for your plants in Boise, you will need to:

• Water them regularly, especially during dry spells.
• Fertilize them according to the package directions.
• Prune them as needed to maintain a healthy shape.
• Protect them from pests and diseases.

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Resources for Gardeners in Boise

There are many resources available to help you learn more about gardening in Boise. Some of these resources include:

• The Boise City Department of Parks and Recreation offers a variety of gardening classes and workshops.
• The Boise Botanical Garden has a library of gardening books and resources.
• The Idaho State University Extension Service offers gardening advice and information.

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Gardening in Boise can be a rewarding experience. By following these tips, you can help your plants thrive and enjoy a beautiful garden all year long.

What zone is Boise Idaho for planting?

Boise, Idaho is located in USDA Hardiness Zone 5b. This means that the average annual minimum temperature is between 20 and 25 degrees Fahrenheit. Plants that are suitable for this zone will be able to withstand cold weather and frost.

What plants can I grow in Boise Idaho?

There are many different types of plants that can be grown in Boise Idaho, depending on your specific climate and growing conditions. Some popular plants for this area include:

• Trees: apple trees, maple trees, oak trees
• Shrubs: roses, hydrangeas, lilacs
• Perennials: daylilies, peonies, hostas
• Annuals: marigolds, petunias, sunflowers

When is the best time to plant in Boise Idaho?

The best time to plant in Boise Idaho is in the spring, after the last frost date. This is typically around mid-May. However, you can also plant some vegetables and flowers in the fall, as long as the ground is not frozen.

How do I prepare my soil for planting?

Before you plant anything, it is important to prepare your soil. This involves removing any weeds or debris, and tilling the soil to a depth of about 12 inches. You may also want to add some compost or fertilizer to the soil to improve its fertility.

How much water do my plants need?

The amount of water your plants need will vary depending on the type of plant, the climate, and the time of year. In general, plants need more water during the summer months when it is hot and dry. You should water your plants deeply, so that the water reaches the roots.

What pests and diseases are common in Boise Idaho?

There are a number of pests and diseases that can affect plants in Boise Idaho. Some of the most common include:

• Aphids: small, sap-sucking insects that can damage leaves and flowers
• Whiteflies: tiny, winged insects that can transmit diseases
• Spider mites: tiny, eight-legged mites that can cause leaves to turn yellow and drop off
• Powdery mildew: a fungal disease that causes white, powdery growth on leaves
• Rust: a fungal disease that causes orange or brown spots on leaves

How can I prevent pests and diseases from damaging my plants?

There are a number of things you can do to prevent pests and diseases from damaging your plants. Some of the most effective measures include:

• Plant resistant varieties of plants
• Practice good sanitation by removing weeds and debris from your garden
• Water your plants deeply and regularly
• Inspect your plants regularly for signs of pests or diseases
• Treat your plants with pesticides or fungicides as needed

Where can I get more information about planting in Boise Idaho?

There are a number of resources available to help you learn more about planting in Boise Idaho. Some of the most helpful include:

• The University of Idaho Extension: https://extension.uidaho.edu/
• The Idaho State Department of Agriculture: https://www.isda.idaho.gov/
• The Idaho Botanical Garden: https://www.idahobotanicalgarden.org/

  Boise, Idaho is located in USDA plant hardiness zone 5b. This means that the average annual minimum temperature in Boise is between 20 and 25 degrees Fahrenheit. Plants that are suitable for growing in Boise include hardy perennials, shrubs, trees, and annuals. When choosing plants for your garden, be sure to select varieties that are appropriate for the climate and soil conditions in your area. By following these tips, you can enjoy a beautiful and successful garden in Boise, Idaho.