Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

One way of making a decision about when you can plant bidens is to check out the USDA zone info for Hillsdale.

Planting Calendar for Bidens

Frost tolerance for bidens:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Since bidens are not cold tolerant you must wait until after the last frost has passed before you can plant them.

The earliest that you can plant bidens in Hillsdale 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. You can get started a few weeks earlier by starting your bidens indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Hillsdale. You can expect an average low temperature of 0°F in the coldest months of winter.

Always keep in mind that USDA zone info for Hillsdale may not be accurate from year to year and the actual date of last frost is different every year. Half of the time in Hillsdale you get a frost after April 15 so be sure to be ready to cover your bidens in the event of a late frost.

USDA Zone Info for Hillsdale

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	0°F
Highest Expected Low	5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Hillsdale

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