At soil temperatures of 22C or higher, very little infection occurs.

At this depth the soil temperature only varies between 8-12 C throughout the year.

They have found that root growth continues until soil temperature drops to about 40 degrees.

He tracks the soil temperature in the spring, waiting for it to go above 40 degrees.

A soil temperature of about 60 degrees Fahrenheit is ideal for growth.

Summertime, when soil temperatures are high, is the ideal time to do this.

Their mean annual soil temperature is 8 C or higher.

The optimum soil temperature for good growth ranges from 55 to 70 degrees.

I'll be testing for soil temperature but I might let them go a day or so on the basis of signs.

Roots do not stop growing and functioning until the soil temperatures cool down to 40 or 42 degrees.