Aggregate producers. the following links are part of pit & quarry’s extensive list of links to aggregate-industry websites.. united states. aa will materials corp. – stoughton, massachusetts ac hesse – toms river, new.Dec 07, select plants for your rock garden . start your plant selection by choosing a color scheme that will work well with your stone. for example, if the garden is made primarily with red sandstone, you'll want some plants with a hint of red in them, as well as some plants displaying silver, yellow, white, or other complementary.