When can I plant Oriental poppies in Zone 4a

One of the best tools that we have as gardeners to help us determine our gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for our area.

By referring to the USDA zone info for Zone 4a it's a good idea to determine when it's a good idea to plant oriental poppies.


Planting Calendar for Oriental poppies

Frost tolerance for oriental poppies: Tolerant of some frost.
When you should plant them: Up to 5 weeks before last frost.

Oriental poppies do well in moderate cold which means that you can plant them a little bit earlier than plants that are more sensitive to the cold.

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

The earliest that you can plant oriental poppies in Zone 4a 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 oriental poppies and expect a good harvest is probably August. If you wait any later than that and your oriental poppies may not have a chance to fully mature. Starting your oriental poppies indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

In Zone 4a the average date of last frost happens on May 15. In the coldest months of winter we should expect an average low temperature of -30°F.

It's important to remember that USDA zone info for Zone 4a may not be accurate from year to year and our actual date of last frost will vary from year to year. Half of the time in Zone 4a it frosts late in the year after May 15 so make sure that you are ready to protect your oriental poppies if we have a surprise late frost.

USDA Zone Info for Zone 4a

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)May 15
Average Date of First Frost (fall)September 15
Lowest Expected Low-30°F
Highest Expected Low-25°F

This means that on a really cold year, the coldest it will get is -30°F. On most years you should be prepared to experience lows near -25°F.

Plants to Grow in Zone 4a

You may be interested in our other planting guides for Zone 4a.