One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A common way of determining when it's a good idea to plant bidens is to examine the USDA zone info for Mequon.

Planting Calendar for Bidens

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

It's probably not a good idea to plant bidens until after the last frost when the weather gets warmer because they do not do well in cold weather.

The earliest that you can plant bidens in Mequon 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 bidens and expect a good harvest is probably August. If you wait any later than that and your bidens may not have a chance to grow to maturity. Starting your bidens indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average the last frost has passed is on April 15 in Mequon. It might get as low as -15°F during the coldest months of winter.

Since the USDA zone info for Mequon is just an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Mequon last frost occurs after April 15 be ready to protect your bidens in the event of a surprise late frost.

USDA Zone Info for Mequon

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 Mequon

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