Plant Rack Black Square. This black plant rack; with flower-patterned detailing; is a perfect choice to place your plants; which will be a real eye-catcher in any garden; patio or terrace. The 4-tier plant rack has a height of 60.2. High quality steel makes this plant rack very durable; while powder coating makes it rust-proof and enhances its longevity. Dimension: 24.2″ x 13″ x 60.2 (L x W x H).