Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You will be able to estimate when you can plant hardy asters by reviewing the USDA zone info for Oakdale.

Planting Calendar for Hardy Asters

Frost tolerance for hardy asters:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Since hardy asters do ok in moderate cold you can plant them a bit earlier in the year than other frost tender plants.

The earliest that you can plant hardy asters in Oakdale is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant hardy asters and expect a good harvest is probably August. Any later than that and your hardy asters may not have a chance to fully mature. You can get started a little bit earlier by starting your hardy asters indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on March 15 in Oakdale. In the coldest months of winter you should expect an average low temperature of 15°F.

Since the USDA zone info for Oakdale is an average the actual date of last frost will vary from year to year. Since half of the time in Oakdale it frosts late in the year after March 15 be ready to cover your hardy asters if you have one of those late frosts.

USDA Zone Info for Oakdale

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 Oakdale

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