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 should be able to determine when it's the best time to plant rosemary by checking out the USDA zone info for North Platte.

Planting Calendar for Rosemary

Frost tolerance for rosemary:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Since rosemary do well in cold you can plant them a lot earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant rosemary in North Platte 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 rosemary and expect a good harvest is probably September. You probably don't want to wait any later than that or else your rosemary may not have a chance to really do well. You can get started a couple of weeks earlier by starting your rosemary indoors.

Last Frost Date

In North Platte the average date of last frost happens on April 15. In the coldest months of winter you should expect an average low temperature of -20°F.

Since the USDA zone info for North Platte is not always accurate the actual date of last frost can change quite a bit from year to year. Half of the time in North Platte it frosts late in the year after April 15 so make sure that you are prepared to cover your rosemary in the event of a surprise late frost.

USDA Zone Info for North Platte

Here is the info for USDA Zone 5a.

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

Plants to Grow in North Platte

You may be interested in your other planting guides for North Platte.