Planting Dahlias in Pots

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Short on growing space but want to grow dahlias? Learn how to grow dahlias in pots with these simple tips.

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Choose a clean container with a diameter of at least 12 to 16 inches and a depth of at least 12 to 18 inches. Make sure the container has drainage holes to allow excess water to escape and prevent waterlogging.

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Use a well-draining potting mix. Feel free to add perlite, vermiculite, or sand to the potting mix to improve drainage.

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Plant one dahlia tuber per container, positioning it horizontally with the “eye” or bud facing up then cover the tuber with about 2 inches of potting mix.

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Maintain your containers in full sun with at least 6 hours of direct sunlight per day. Rotate them periodically to ensure even sunlight exposure on all sides of the plant.

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Remember that containers dry out faster than plants in the ground, so it’s important to water potted dahlias regularly. Check the soil moisture level with your finger or a moisture meter. Avoid overwatering and allow the top inch of soil to dry out slightly between watering.

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Fertilize dahlias with a balanced slow-release or water-soluble fertilizer formulated for flowering plants and follow the package instructions for application rates and frequency.

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Stake or cage dahlias to support taller, heavier blooms no later than when the plant is a foot tall. Be careful not to damage the tuber when adding the stakes.

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Follow along to learn more growing dahlias in pots.

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