WASHINGTON—The Trump administration is taking steps to reduce costs and restrictions on farmers looking to hire migrant workers during the coronavirus pandemic, including lowering their minimum wages, according to people familiar with the plans.

The push is driven by newly installed White House chief of staff Mark Meadows and Agriculture Secretary Sonny Perdue, these people said, and many agricultural employers support lower wages. Mr. Perdue has long championed easing requirements on seasonal agricultural guest-worker visas,...