One of the first steps you take when you are getting a good idea your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

It's a good idea to determine when to plant swan river daisy by looking at the USDA zone info for Castle Rock.

Planting Calendar for Swan River Daisy

Frost tolerance for swan river daisy:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Since swan river daisy do not do well in cold weather you have to wait until after the last frost before you can plant them.

The earliest that you can plant swan river daisy in Castle Rock 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 swan river daisy and expect a good harvest is probably August. If you wait any later than that and your swan river daisy may not have a chance to grow to maturity. You can get started a little bit earlier by starting your swan river daisy indoors.

Last Frost Date

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

Just be sure to remember that USDA zone info for Castle Rock is an average and the actual date of last frost is different every year. Since half of the time in Castle Rock last frost occurs after April 15 be ready to protect your swan river daisy if you have a surprise late frost.

USDA Zone Info for Castle Rock

Here is the info for USDA Zone 5b.

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

Plants to Grow in Castle Rock

You may be interested in your other planting guides for Castle Rock.