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

By looking at the USDA zone info for Princeton it's possible to determine when to plant mimulus.

Planting Calendar for Mimulus

Frost tolerance for mimulus:	Not tolerant of frost.
When to plant:	After the last frost.

Since mimulus are not cold tolerant you have to wait until after the last frost has passed before you can plant them.

The earliest that you can plant mimulus in Princeton 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. Any later than that and your mimulus may not have a chance to really do well. You can get started a couple of weeks earlier by starting your mimulus indoors.

Last Frost Date

The average date of last frost is April 15 in Princeton. It might get as low as -15°F during the coldest months of winter.

It's important to remember that USDA zone info for Princeton is an average and the actual date of last frost changes from year to year. Half of the time in Princeton there is a last frost after April 15 so always be ready to protect your mimulus if you have a surprise late frost.

USDA Zone Info for Princeton

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-15°F
Highest Expected Low	-10°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 -10°F.

Plants to Grow in Princeton

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