One of the first steps you take when you are estimating your gardening schedule is find your 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.

The USDA zone info for Dover can be reviewed to determine when it's a good idea to plant bidens.

Planting Calendar for Bidens

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

Bidens require warm weather which tells us that you need to wait until it warms up after the last frost before you can plant them.

The earliest that you can plant bidens in Dover 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 really do well. You can get started a couple of weeks earlier by starting your bidens indoors.

Last Frost Date

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

It's important to remember that the actual date of last frost is not always accurate because it is based on the USDA zone info for Dover and it is different every year. Since half of the time in Dover there is a last frost after April 15 be ready to protect your bidens if you have a late frost.

USDA Zone Info for Dover

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 Dover

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