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Oyster plant (Mertensia maritima)

The oyster plant is a perennial, succulent coastal plant. With its smooth, pointed, light turquoise leaves, it is a beautiful and easy-care pot or garden plant native to the coasts of northern Scotland.

Cultivation and propagation – what should you pay attention to?

The oyster plant is very susceptible to snails. It requires a full-sun location and a loose, humus-rich to sandy-stony substrate. The substrate must not be too nutrient-rich. The plants are best propagated vegetatively by division. Those wishing to sow them should follow the instructions from the Gaissmayer perennial nursery: "The seeds germinate very unevenly and over a long period of time. Temperatures below 5 degrees Celsius are beneficial for inducing germination. Therefore, it is recommended to sow during the cold season and place the seed containers outdoors."

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Harvesting and preserving – when, what and how best?

The plants grow to only 20-30 cm tall, and the leaves can be harvested continuously. The flowers, which appear in June or July, are initially pale pink, later turning intense blue, and attract numerous insects.

Use – What recommendations for herbal cooking?

The amazing flavor reminds some of oysters, others of mushrooms. As a fresh leafy seasoning for seafood dishes, but also for vegetable dishes, the leaves add a surprising flavor component. This coastal plant also pairs well with fresh salads, on bread, and with raw vegetables.

TEXT: Juliane Michel

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