When can I plant Mimulus in Zone 5a

Before planting it is a good idea to find our USDA Zone info to figure out our garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for our area.

A way of estimating when it's possible to plant mimulus is to use the USDA zone info for Zone 5a.


Planting Calendar for Mimulus

Frost tolerance for mimulus: Not tolerant of frost.
When you should plant them: After the last frost when the weather gets warmer.

Mimulus do not do well in cold weather which tells us that it is important to wait until it warms up after the last frost has passed before you can plant them.

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

The earliest that you can plant mimulus in Zone 5a 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 mimulus and expect a good harvest is probably August. If you wait any later than that and your mimulus may not have a chance to fully mature. Starting your mimulus indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average all chance of frost has passed is on April 15 in Zone 5a. In the coldest months of winter we should expect an average low temperature of -20°F.

Just be sure to remember that our actual date of last frost is not always accurate because it is based on the USDA zone info for Zone 5a and it can change quite a bit from year to year. Half of the time in Zone 5a there is a last frost after April 15 so just be sure to be ready to cover your mimulus in the event of one of those late frosts.

USDA Zone Info for Zone 5a

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)April 15
Average Date of First Frost (fall)October 15
Lowest Expected Low-20°F
Highest Expected Low-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in Zone 5a

You may be interested in our other planting guides for Zone 5a.