When to Plant Columbine in Washington, IA

The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Washington you can determine when it's the best time to plant columbine by checking out the USDA zone info.

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Planting Calendar for Columbine

Frost tolerance for columbine: Tolerant of some frost.
When to plant: Up to 5 weeks before last frost.

Columbine do well in a little bit of cold which means that you can plant them a little earlier in the year than plants that are more sensitive to the cold.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant columbine
Possibly ok, but a risky time to plant columbine
Probably not a good time to plant columbine

The earliest that you can plant columbine in Washington is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant columbine and expect a good harvest is probably September. Any later than that and your columbine may not have a chance to fully mature. You can get started a little bit earlier by starting your columbine indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Washington. In the coldest months of winter you can expect an average low temperature of -15°F.

It's important to remember that USDA zone info for Washington is an average and the actual date of last frost changes from year to year. Since half of the time in Washington it frosts late in the year after April 15 be ready to cover your columbine if you have a late frost.

USDA Zone Info for Washington

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)April 15
Average Date of First Frost (fall)October 15
Lowest Expected Low-15°F
Highest Expected Low-10°F

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Washington

You may be interested in your other planting guides for Washington.