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Are You a Master of Mulch? A Scholar of Sweet Box? Prove It.

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b) Sweetbay magnolia.

c) Summersweet ( Clethra alnifolia).

7. When were green roofs first built?

a) In the early 20th century, when Frank Lloyd Wright designed one in Chicago.

b) In the 15th century, the end of the medieval period, when gardens could safely move outside European castle walls.

c)2,500 to 3,000 years ago in Rome, and in the Tigris and Euphrates river valleys.

8. What's a shade-tolerant, low-growing (one to two feet) evergreen?

a) Sweet box ( Sarcocca hookeriana"humilis").

b) Andorra juniper ( Juniperus horizontalis"Wiltonii").

c) Mugo pine ( Pinus mugo var. mugo).

9. How do you know where to install a native plant?

a) Locate according to cultural requirements: moist or dry, sun or shade.

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