Grow celery from the bottom part of your store bought stalks - works with Romaine lettuce too!
This tiny balcony vegetable garden only uses 3 square yards of space and grows 21 varieties // even though I have a big yard, still so many good ideas here.
Square foot gardening
Add some visual interest to your patio with an old pallet and some terra cotta
Growing bean plants in CD cases so all the parts can be seen.