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When to Plant Bleeding Hearts in New Ulm, MN

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

By using the USDA zone info for New Ulm it's possible to determine when it's the best time to plant bleeding hearts.

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Planting Calendar for Bleeding Hearts

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

Since bleeding hearts are barely cold tolerant you can plant them slightly earlier in the year than more sensitive plants.

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

The earliest that you can plant bleeding hearts in New Ulm 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 bleeding hearts and expect a good harvest is probably August. You probably don't want to wait any later than that or else your bleeding hearts may not have a chance to really do well. If you are starting your bleeding hearts indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

In New Ulm the average date of last frost happens on May 15. In the coldest months of winter you should expect an average low temperature of -25°F.

Keep in mind 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 New Ulm and it can change quite a bit from year to year. Half of the time in New Ulm you get a frost after May 15 so always be ready to cover your bleeding hearts in the event of a surprise late frost.

USDA Zone Info for New Ulm

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 New Ulm

You may be interested in your other planting guides for New Ulm.