Located on top of the Sydney L. Olson Research Center, Akron University's first green roof is an 18,000 sf extensive green roof with over 15 varieties of perennial plants. After its first full growing season, the plants are well established and ready for a winter nap. Initially planted in October 2012, we established this roof without ever irrigating and only lightly fertilizing at a rate of 5 g / m2 (0.0164 oz / ft2) pure Nitrogen. As you can see from the pictures below, the green roof is growing in very nicely and is home to a variety of insects.
Back in mid-September: Nearly 1 year of growth.