hard freeze

The chestnut crop was good and we knew that the first hard freeze would open the burs.

I notice some places where the Stuart has lived six or seven years, and then some particularly hard freeze has frozen it back.

Some of them blossomed very freely last spring, but on account of the hard freeze in May they did not set any fruit.

There had been no hard freeze since the rains and the field was as springy under foot as in September.

The ice must be fine after that little thaw, and hard freeze.