Pequeño jardín con cactus - not in English, but terrific picture tutorial. I'd love to do this on a bigger scale for the front yard or down the side of the house.
How to Grow Pineapple Plants from Pineapple Tops
Planting Lemon Seeds: Lemon leaves smell so good. Awesome for kitchen, bathroom, or any place in the house.
DIY Wood and Leather Trellis Plant Wall - Vintage Revivals