The Lowell School gravel garden in Washington, DC growing various types of lettuce, along with corn, cucumbers and marigolds. (PRNewsFoto/To Soil Less)
Gravel 101: A New Kind of School Garden
Gravel 101: A New Kind of School Garden
The Lowell School gravel garden in Washington, DC growing various types of lettuce, along with corn, cucumbers and marigolds. (PRNewsFoto/To Soil Less)