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Algae growth in concrete planter boxes can be unsightly and harmful to plants. To prevent algae, start by ensuring proper drainage. Excess moisture is a primary cause of algae, so drill drainage holes if your planter lacks them. Use a well-draining soil mix to avoid waterlogging. Regularly clean the planter by scrubbing with a mixture of water and white vinegar, which is a natural algae deterrent. Avoid overwatering your plants, as stagnant water promotes algae growth. Additionally, placing your planter in a location with adequate sunlight can help, as algae thrive in damp, shaded areas. For extra protection, consider applying a sealant to the concrete surface to reduce moisture absorption. By following these steps, you can keep your concrete planter boxes algae-free and maintain a healthy garden.
