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.

You can figure out when it's the best time to plant bidens in Siler City by using the USDA zone info.

Planting Calendar for Bidens

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

It's not a good idea to plant bidens until after all chance of frost has passed because they require warm weather.

The earliest that you can plant bidens in Siler City 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. If you are starting your bidens indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Siler City. It might get as low as 5°F during the coldest months of winter.

Always keep in mind that USDA zone info for Siler City is an average and the actual date of last frost is different every year. Half of the time in Siler City you get surprised by a frost after April 15 so always be ready to cover your bidens in the event of a surprise late frost.

USDA Zone Info for Siler City

Here is the info for USDA Zone 7b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	5°F
Highest Expected Low	10°F

This means that on a really cold year, the coldest it will get is 5°F. On most years you should be prepared to experience lows near 10°F.

Plants to Grow in Siler City

You may be interested in your other planting guides for Siler City.