Portland falls into USDA hardiness zone 8b (with average low temperatures from 15 to 20 degrees Fahrenheit) or 9a (with average lows from 20 to 25 degrees Fahrenheit) for parts of inner Portland. Index is a tool that helps you determine your zone. You can find it on the USDA website at: http://www.fs.usda.gov/hardiness/index.html. The zone index is based on your latitude and longitude.

For example, if you are located in the Pacific Northwest, you would be in zone 7. Zone 7 is considered to be the most difficult zone for most people to survive in due to its extreme cold temperatures and lack of precipitation. If you live outside of the zone, your chances of survival are much lower.

What planting zone is Willamette Valley Oregon?

Zone 6 includes the cowlitz drainage in washington, as well as the willamette valley in oregon and the columbia river valley in washington. Zones 7 and 8 are located in the Pacific Northwest, including the cities of Seattle and Portland, Oregon.

What is Oregon zone?

In the usda hardiness zone map, central oregon is placed in zone 6. In fact, the average high temperature in Washington, Oregon, Idaho, Montana, and Wyoming is –19 degrees.

The average low temperature is also in this range, at about –15 degrees, though it can dip to as low as –12 degrees in some areas.

This is why it’s important to know your zone, as well as your latitude and longitude, so you can plan your outdoor activities accordingly.

What zone is Ashland Oregon?

Ashland is in the USDA winter hardiness Zone 8a with relatively mild winters and Sunset Zone 7 with mild but pronounced winters and hot summers that supports plants and deciduous trees that require a marked seasonal pattern to do well—flower bulbs, peonies, lilacs, daffodils, and many others. Zones 7a and 7b are the most difficult zones to grow in, as they are too hot and dry for most of the year.

In fact, many of these plants can be grown in zones 8b and 8c, but it is best to plant them in a zone that is more suitable for them, such as zone 9a or 9b. For more information on how to choose the right zone for your plant, please see our page on growing plants in different zones.

Which flowers grow best in zone 8b?


  • Zone 8 is ideal for growing a huge variety of plants
  • Clematis
  • Mums
  • Coral bells
  • Zinnias
  • Sunflowers
  • Daisies
  • Herbs
  • Nasturtium
  • Pansies
  • Meadowfoam
  • hellebores
  • Many more

The lowest winter temperatures of the year allow many plants to thrive outdoors in this zone. Zone 9 is a great place to grow succulents, as well as many other plants.

This zone also has the lowest average summer temperatures, making it a good place for succulent plants to thrive. The average winter temperature is the highest in the zone, which makes it an ideal zone for flowering plants such as daffodils, tulips, chrysanthemums and lilies.

When should I start seeds in zone 8b?

You can start the seeds indoors six weeks before the last spring frost date for zone 8. You can find the average date of the last spring frost in your area. For example, if you live in an area with an average of 3.5 inches of snow on the ground in March, you should start your seeds in the spring of that year.

If you want to start seeds outdoors, the best time to do this is in late April or early May. This is the time of year when the soil is warm and moist, and the plants are ready to flower. If you are starting seeds outside, be sure to plant them in a well-drained soil that is not too wet or too dry.

Too much moisture can cause the seedlings to rot, which is why it is important to keep your soil moist during the first few weeks of your seedling’s life. You can also use a soil test kit to check the moisture content of soil before you plant seeds.

The kit will tell you the amount of moisture that needs to be present in order for seeds to germinate. It will also give you an estimate of how much water you will need to add to your garden to ensure that your plants will be able to survive the winter.

What is the difference between zone 6a and 6b?

6a and 6b. Zone 6a has an average minimum temperature of negative five to negative ten degrees Fahrenheit. Zone 6b experiences minimum temperatures of minus ten to minus twenty-five degrees. Zones 7a, 7b, and 7c are located in the southern part of the state.

These zones have average maximum temperatures between minus five and minus fifteen degrees, depending on the time of year. Zones 8a through 8b are found in central and northern California. In these zones, the minimum and maximum temperature averages are between plus ten and plus twenty degrees respectively.

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