frostdate name logo in white
frostdate name logo in white

When to Plant Verbena in Umatilla, OR

The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By referring to the USDA zone info for Umatilla you should be able to figure out when you can plant verbena.


Planting Calendar for Verbena

Frost tolerance for verbena: Tolerant of a very small amount of frost.
When to plant: Up to 3 weeks before last frost.

Verbena are one of those plants that can tolerate a tiny bit of cold weather which tells us that you can get them planted just a bit earlier than other plants that might not handle the cold.

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

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

The last month that you can plant verbena and expect a good harvest is probably August. If you wait any later than that and your verbena may not have a chance to grow to maturity. If you are starting your verbena indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

In Umatilla the average date of last frost happens on April 15. In the coldest months of winter you should expect an average low temperature of 5°F.

It's important to remember that the actual date of last frost may not be accurate from year to year because it is based on the USDA zone info for Umatilla and it changes from year to year. Since half of the time in Umatilla you get surprised by a frost after April 15 be ready to protect your verbena in the event of a surprise late frost.

USDA Zone Info for Umatilla

Here is the info for USDA Zone 7b.

Average Date of Last Frost (spring)April 15
Average Date of First Frost (fall)October 15
Lowest Expected Low5°F
Highest Expected Low10°F

This means that on a really cold year, the coldest it will get is 5°F. On most years you should be prepared to experience lows near 10°F.

Plants to Grow in Umatilla

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