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.

In Altus you can estimate when you can plant salsify by looking at the USDA zone info.

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 do ok in moderate cold which means that you can get them planted just a bit earlier than other frost tender plants.

The earliest that you can plant salsify in Altus 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. Any later than that and your salsify may not have a chance to really do well. Starting your salsify indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost is on April 15 in Altus. You should expect an average low temperature of 5°F in the coldest months of winter.

Since the USDA zone info for Altus is just an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Altus you get a frost after April 15 be ready to protect your salsify in the event of a late frost.

USDA Zone Info for Altus

Here is the info for USDA Zone 7b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	5°F
Highest Expected Low	10°F

This means that on a really cold year, the coldest it will get is 5°F. On most years you should be prepared to experience lows near 10°F.

Plants to Grow in Altus

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