One of the first steps you take when you are getting a good idea 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.

By looking at the USDA zone info for North Platte it's a good idea to estimate when it's a good idea to plant armeria.

Planting Calendar for Armeria

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

Since armeria do well in cold you can plant them a lot earlier in the year than other plants that might not handle the cold.

The earliest that you can plant armeria 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 armeria and expect a good harvest is probably September. If you wait any later than that and your armeria may not have a chance to fully mature. If you are starting your armeria indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

The average date of last frost is April 15 in North Platte. You should expect an average low temperature of -20°F in the coldest months of winter.

Since the USDA zone info for North Platte is an average the actual date of last frost changes from year to year. Half of the time in North Platte last frost occurs after April 15 so always be ready to protect your armeria if you have one of those late frosts.

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.