Although considered as an invasive specie, the Pickerel Rush is an attractive plant which will definitely bring some drama into your aquatic garden. They are noted for their blue-spiked flowers blooming early in summer and lasts up to fall. On mature plants, the stems arch gracefully on the other water-grown plants. They're also easy to care as they should be kept in deep pots where the roots can maintain its moisture.

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Source: Gardening Know How