One of the first steps you take when you are estimating your gardening schedule is find your 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 Inverness should be looked at to determine when it's the best time to plant twinspur.

Planting Calendar for Twinspur

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

Since twinspur do well in moderate cold you can plant them a little bit earlier in the year than other frost tender plants.

The earliest that you can plant twinspur in Inverness is January. However, you really should wait until February if you don't want to take any chances.

The last month that you can plant twinspur and expect a good harvest is probably October. If you wait any later than that and your twinspur may not have a chance to grow to maturity. Starting your twinspur indoors is a great way to get them started a little bit earlier.

Last Frost Date

In Inverness the average date of last frost happens on February 15. It might get as low as 20°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Inverness may not be accurate from year to year and the actual date of last frost is different every year. Since half of the time in Inverness last frost occurs after February 15 be ready to protect your twinspur in the event of one of those late frosts.

USDA Zone Info for Inverness

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.

Plants to Grow in Inverness

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