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.

The best time to plant pampas grass in Zone 1b should be determined by referring to the USDA zone info.

Planting Calendar for Pampas Grass

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

You can not plant pampas grass until after all chance of frost has passed because they require warm weather.

The earliest that you can plant pampas grass in Zone 1b is June. However, you really should wait until July if you don't want to take any chances.

The last month that you can plant pampas grass and expect a good harvest is probably July. Any later than that and your pampas grass may not have a chance to fully mature. If you are starting your pampas grass indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

In Zone 1b the average date of last frost happens on June 15. In the coldest months of winter you should expect an average low temperature of -55°F.

Since the USDA zone info for Zone 1b is an average the actual date of last frost will vary from year to year. Half of the time in Zone 1b last frost occurs after June 15 so make sure that you are prepared to protect your pampas grass if you have a late frost.

USDA Zone Info for Zone 1b

Here is the info for USDA Zone 1b.

Average Date of Last Frost (spring)	June 15
Average Date of First Frost (fall)	July 15
Lowest Expected Low	-55°F
Highest Expected Low	-50°F

This means that on a really cold year, the coldest it will get is -55°F. On most years you should be prepared to experience lows near -50°F.

Plants to Grow in Zone 1b

You may be interested in your other planting guides for Zone 1b.