One of the best tools that you have as gardeners to help us determine 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 common way of making a decision about when it's a good idea to plant matricaria is to look at the USDA zone info for Elk River.

Planting Calendar for Matricaria

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

You can plant matricaria just a bit earlier in the year because they are moderately cold tolerant.

The earliest that you can plant matricaria in Elk River 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. If you wait any later than that and your matricaria may not have a chance to grow to maturity. Starting your matricaria indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on May 15 in Elk River. You can expect an average low temperature of -25°F in the coldest months of winter.

It's important to remember that USDA zone info for Elk River is an average and the actual date of last frost changes from year to year. Half of the time in Elk River there is a last frost after May 15 so be sure to be ready to cover your matricaria if you have one of those late frosts.

USDA Zone Info for Elk River

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 Elk River

You may be interested in your other planting guides for Elk River.