When to Plant Cleome in Cornelius, OR

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

One way of making a decision about when to plant cleome is to use the USDA zone info for Cornelius.


Planting Calendar for Cleome

Frost tolerance for cleome: Not tolerant of frost.
When to plant: After all chance of frost has passed.

Since cleome require warm weather it is necessary to wait until after the last frost when the weather gets warmer before you can plant them.

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

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

The last month that you can plant cleome and expect a good harvest is probably August. Any later than that and your cleome may not have a chance to really do well. Starting your cleome indoors is a great way to get them started a little bit earlier.

Last Frost Date

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

Since the USDA zone info for Cornelius is not always accurate the actual date of last frost can change quite a bit from year to year. Half of the time in Cornelius there is a last frost after March 15 so make sure that you are prepared to protect your cleome if you have one of those late frosts.

USDA Zone Info for Cornelius

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)March 15
Average Date of First Frost (fall)November 15
Lowest Expected Low15°F
Highest Expected Low20°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 20°F.

Plants to Grow in Cornelius

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