The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By referring to the USDA zone info for Westminster you should be able to figure out when you can plant bidens.

Planting Calendar for Bidens

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

You really shouldn't plant bidens until after the last frost because they require warm weather.

The earliest that you can plant bidens in Westminster is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant bidens and expect a good harvest is probably September. Any later than that and your bidens may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your bidens indoors.

Last Frost Date

In Westminster the average date of last frost happens on January 31. In the coldest months of winter you should expect an average low temperature of 35°F.

Remember that the actual date of last frost is just an average because it is based on the USDA zone info for Westminster and it is different every year. Since half of the time in Westminster there is a last frost after January 31 be ready to protect your bidens if you have one of those late frosts.

USDA Zone Info for Westminster

Here is the info for USDA Zone 10b.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	35°F
Highest Expected Low	40°F

This means that on a really cold year, the coldest it will get is 35°F. On most years you should be prepared to experience lows near 40°F.

Plants to Grow in Westminster

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