One of the best tools that you have as gardeners to help us estimate your gardening schedule is the 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.

You will be able to figure out when to plant asters by using the USDA zone info for Ridgefield.

Planting Calendar for Asters

Frost tolerance for asters:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Asters do well in moderate cold which means that you can get them planted earlier than other frost tender plants.

The earliest that you can plant asters in Ridgefield 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 asters and expect a good harvest is probably September. If you wait any later than that and your asters may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your asters indoors.

Last Frost Date

The average date of last frost is March 15 in Ridgefield. You can expect an average low temperature of 15°F in the coldest months of winter.

Since the USDA zone info for Ridgefield may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Half of the time in Ridgefield you get a frost after March 15 so make sure that you are prepared to protect your asters if you have a late frost.

USDA Zone Info for Ridgefield

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°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 20°F.

Plants to Grow in Ridgefield

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