One of the first steps you take when you are figuring out 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.

The USDA zone info for Suisun City can be looked at to estimate when it's the best time to plant balsam.

Planting Calendar for Balsam

Frost tolerance for balsam:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

It's probably a bad idea to plant balsam until after the last frost has passed because they are not cold tolerant.

The earliest that you can plant balsam in Suisun City 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 balsam and expect a good harvest is probably September. If you wait any later than that and your balsam may not have a chance to grow to maturity. You can get started a little bit earlier by starting your balsam indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on February 15 in Suisun City. In the coldest months of winter you should expect an average low temperature of 25°F.

Since the USDA zone info for Suisun City is an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Suisun City you get surprised by a frost after February 15 be ready to cover your balsam in the event of one of those late frosts.

USDA Zone Info for Suisun City

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Suisun City

You may be interested in your other planting guides for Suisun City.