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 determine when it's possible to plant gypsophila by checking out the USDA zone info for Missoula.

Planting Calendar for Gypsophila

Frost tolerance for gypsophila:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

You can plant gypsophila just a bit earlier in the year because they are one of those plants that can tolerate a little bit of cold weather.

The earliest that you can plant gypsophila in Missoula 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 gypsophila and expect a good harvest is probably September. Any later than that and your gypsophila may not have a chance to grow to maturity. You can get started a little bit earlier by starting your gypsophila indoors.

Last Frost Date

The average date of last frost is April 15 in Missoula. In the coldest months of winter you should expect an average low temperature of -15°F.

Keep in mind that the actual date of last frost is an average because it is based on the USDA zone info for Missoula and it can change quite a bit from year to year. Half of the time in Missoula last frost occurs after April 15 so always be ready to cover your gypsophila in the event of a surprise late frost.

USDA Zone Info for Missoula

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 Missoula

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