One of the best tools that you have as gardeners to help us estimate your gardening schedule is the 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.

A way of making a decision about when it's a good idea to plant matricaria is to use the USDA zone info for Princeton.

Planting Calendar for Matricaria

Frost tolerance for matricaria:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Matricaria can survive in a little bit of cold which means that you can plant them just a bit earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant matricaria in Princeton 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 matricaria and expect a good harvest is probably August. Any later than that and your matricaria may not have a chance to grow to maturity. You can get started a little bit earlier by starting your matricaria indoors.

Last Frost Date

The average date of last frost is May 15 in Princeton. In the coldest months of winter you should expect an average low temperature of -30°F.

Always keep in mind that USDA zone info for Princeton is not always accurate and the actual date of last frost can change quite a bit from year to year. Since half of the time in Princeton you get surprised by a frost after May 15 be ready to cover your matricaria if you have one of those late frosts.

USDA Zone Info for Princeton

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 Princeton

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