One of the best tools that you have as gardeners to help us estimate your gardening schedule is the 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.

You can figure out when to plant cigar plant in Helena by using the USDA zone info.

Planting Calendar for Cigar Plant

Frost tolerance for cigar plant:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Cigar Plant require warm weather which means that you need to wait until it warms up after the last frost before you can plant them.

The earliest that you can plant cigar plant in Helena is May. However, you really should wait until June if you don't want to take any chances.

The last month that you can plant cigar plant and expect a good harvest is probably August. If you wait any later than that and your cigar plant may not have a chance to grow to maturity. If you are starting your cigar plant indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

On average the last frost has passed is on May 15 in Helena. You should expect an average low temperature of -25°F in the coldest months of winter.

Remember that USDA zone info for Helena is not always accurate and the actual date of last frost is different every year. Half of the time in Helena there is a last frost after May 15 so just be sure to be ready to cover your cigar plant if you have a surprise late frost.

USDA Zone Info for Helena

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°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 -20°F.

Plants to Grow in Helena

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