Before planting it is a good idea to find your USDA Zone info to determine 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 will be able to figure out when you can plant santolina by looking at the USDA zone info for Castle Rock.

Planting Calendar for Santolina

Frost tolerance for santolina:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Santolina are very cold tolerant which means that you can start planting them much earlier than more sensitive plants.

The earliest that you can plant santolina in Castle Rock 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 santolina and expect a good harvest is probably September. You probably don't want to wait any later than that or else your santolina may not have a chance to fully mature. You can get started a few weeks earlier by starting your santolina indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Castle Rock. It might get as low as -15°F during the coldest months of winter.

It's important to remember that USDA zone info for Castle Rock is just an average and the actual date of last frost is different every year. Since half of the time in Castle Rock you get a frost after April 15 be ready to cover your santolina in the event of one of those late frosts.

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.