Growing Dahlias in Containers

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Short on garden space but still want to grow dahlias? Learn how to grow dahlias in containers with these simple tips.

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Choose a 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. You can also 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. Cover the tuber with about 2 inches of potting mix.

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

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Containers dry out faster than the ground, so it’s important to water them regularly, checking the soil moisture level with your finger or a moisture meter. Avoid overwatering, as soggy soil can lead to root rot. Allow the top inch of soil to dry out slightly between watering.

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Fertilize dahlias with a balanced water-soluble fertilizer and stake plants to help support the height and weight of the blooms.

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In colder climates, dahlias will need to be dug up and overwintered indoors if you want to enjoy the following season.

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Follow along to learn more about growing dahlias.

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