Vertical gardens

Recently I've become fascinated by vertical gardens. They're cropping up all over the place, whether it's in my neighborhood's newest hair salon or in San Diego as the beginnings of a new company. Vertical gardens have several cool advantages over horizontal ones:

• They use less water. According to Green Diary, Vertical Earth Gardens has created a system that uses 80% less water than traditional gardens via a hydroponics system.
• They can make previously undesirable areas look nice. Nicer, well-maintained areas have fewer instances of crime, graffiti, etc.
• They can take manydifferentforms.
• You can add more variety at different heights. In London, the 8 foot spectacular vertical garden features over 260 plant species, each according to the climate needs at different altitudes.