Windcliff, Seattle, Washington: two of the garden’s key plants play a major role in this scene: red-flowered Lobelia tupa in the foreground and the pampas grass Cortaderia fulvida beyond it. Spiky Yucca rostrata contrasts with soft stipa behind.

Cornerstone Place, Sonoma, California: Claude Cormier’s Blue Tree, a dead Monterey pine covered in blue plastic balls, became the roadside signature of the new garden festival