Knot Gardens-EXCERPT: 'Knot gardens were popularised in English gardens in the mid-15th century, when the stability of the nation was reflected in the increasing confidence of domestic architecture. People had the time, money and security to make their gardens a haven for relaxation. Knot gardens, mazes and labyrinths were all common, and provided intellectual puzzles to amuse the viewer.'
Instead of using preset timers, the Rachio Iro Smart Sprinkler Controller (from $249) pairs with your smartphone and uses the location data to track local rain, wind, and humidity, creating a system made just for you. You can even designate zones in your yard so that your cactus garden gets less water than your petunias. Russ and Reyn - PopularMechanics.com