When to Plant Salsify in Castle Rock, CO

One of the first steps you take when you are estimating your gardening schedule is find your 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.

A common way of figuring out when you can plant salsify is to look at the USDA zone info for Castle Rock.


Planting Calendar for Salsify

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

Salsify are barely cold tolerant which means that you can plant them slightly earlier than other plants that might not handle the cold.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant salsify
Possibly ok, but a risky time to plant salsify
Probably not a good time to plant salsify

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

Last Frost Date

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

Since the USDA zone info for Castle Rock is not always accurate the actual date of last frost will vary from year to year. Since half of the time in Castle Rock you get a frost after April 15 be ready to cover your salsify 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.