When can I plant Oriental poppies in Zone 4b

One of the first steps we take when we are estimating our gardening schedule is find our USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for our area.

In Zone 4b you can determine when it's possible to plant oriental poppies by checking out the USDA zone info.


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.

Since oriental poppies do well in moderate cold 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 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 4b 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. Any later than that and your oriental poppies may not have a chance to grow to maturity. If you are starting your oriental poppies indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

In Zone 4b the average date of last frost happens on May 15. It might get as low as -25°F during the coldest months of winter.

Always keep in mind that USDA zone info for Zone 4b is an average and our actual date of last frost is different every year. Since half of the time in Zone 4b we get surprised by a frost after May 15 be ready to cover your oriental poppies if we have a surprise late frost.

USDA Zone Info for Zone 4b

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)May 15
Average Date of First Frost (fall)September 15
Lowest Expected Low-25°F
Highest Expected Low-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Zone 4b

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