One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The USDA zone info for Helena can be looked at to estimate when it's a good idea to plant african daisy.

Planting Calendar for African Daisy

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

Since african daisy do well in moderate cold you can plant them a little bit earlier in the year than other plants that might not handle the cold.

The earliest that you can plant african daisy in Helena 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 african daisy and expect a good harvest is probably September. You probably don't want to wait any later than that or else your african daisy may not have a chance to really do well. If you are starting your african daisy indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

On average the last frost is on March 15 in Helena. In the coldest months of winter you can expect an average low temperature of 10°F.

Since the USDA zone info for Helena may not be accurate from year to year the actual date of last frost is different every year. Half of the time in Helena you get a frost after March 15 so just be sure to be ready to protect your african daisy in the event of one of those late frosts.

USDA Zone Info for Helena

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°F

This means that on a really cold year, the coldest it will get is 10°F. On most years you should be prepared to experience lows near 15°F.

Plants to Grow in Helena

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