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Q: My backyard consists mainly of a concrete slab patio and a retaining wall made from concrete blocks. It's so gray that even the trailing rosemary and bougainvilleas I've planted look washed out. I ...

If you're looking for ways to reduce the costs of gardening, there are a bounty of garden design DIYs to try—and one of our favorites makes use of a material you might already have at home: cinder ...