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Self-watering planter made from recycled bottles. (I'd want to try this with a 2-liter plastic bottle, and cut the top off, so I could get the root system out intact for transplants.)
Concrete Planters from Recycled bottles! These can be SO expensive too... I need to find some large plastic containers... I bet you can put straws through too if you want to create drainage. I also think that you could make planters with the right size container!
How to: Modern Planter Bench. Two in One. Adding additional seating and some greenery are two basic objectives for a stylish outdoor space. They used two large ceramic pots to act as legs, and built a wood top that rests right over them. We love the simple concept and could see lots of ways to customize it to any space.