hotbed

California has become a hotbed for developing the technology.

The Lexington plant is located just off Interstate 80 in Nebraska, squarely in a cattle country hotbed.

Long known as the world’s factory, China is fast becoming a hotbed of innovation.

It doesn’t meet with institutional investors, avoids industry conferences, and it’s based outside Cleveland, not exactly a hotbed of financial activity.

By the late 19th century, Southwestern Ontario had become a hotbed for baseball talent.