Located on River Road in Montgomery County, Maryland, the McKee-Beshers Wildlife Management Area is a 2,000-acre tract in a mixture of woodlands, fields, wooded bottomland, and managed wetland impoundments (green-tree reservoirs). Sunflowers are planted in late April or early May. Weather, seed variety, weed competition, soil conditions, and herbivore damage will all impact the time that it takes for the plants to bloom. With favorable conditions, the sunflowers will bloom in mid-July. In early to mid-August, sunflower strips are mowed.
The McKee-Beshers Wildlife Management Area may be accessed any time of day, with no overnight camping allowed. There is no fee or permit required to access the property.
https://visitmontgomery.com/blog/see-do/everything-you-need-to-know-about-the-sunflower-fields-in-montgomery-county/
