Sweet Flag

Sweet Flag

Did you know? Only sweet flags that grow in water bear flowers!
Common name : Sweet Flag
Scientific name : Acorus calamus
Family : Acoraceae
Category : Perennials
Type of plant : Perennial
Acorus calamus - the sweet flag is a species of flowering plant in the the family Acoraceae. It is a herbaceous perennial, growing to 30–100 cm (12–39 in) tall, resembling the iris, with tufts of basal leaves rising from a spreading rhizome. The leaves are sword-shaped erect yellowish-green with pink sheathing at their bases. It can easily be distinguished from iris and other similar plants by the crimped edges of the leaves, the fragant odour it emits when crushed, and the presence of a spadix.

Sowing & planting



Water needs
Granulométrie plants.granulometry_2
Frost-resistance High
Zone USDA 7a
Height 60 - 100
pH 6 - 7

Plant my sweet flag

Plant preferably between September and the end of November or between March and the end of April, when the winter reserves are formed and the temperatures are not too low. Bury the roots a few centimeters so that the foliage is flush. Fill and pack well around the plant so as not to leave a pocket of air. Water copiously just after planting. If you are planting in a pot, use one whose volume corresponds to that of the plant, otherwise you will have to water it too often. You can use gravel at the bottom under mixture of soil, compost or compost for better drainage.

Water my sweet flag

Water regularly in the first weeks. Try to avoid watering on sunny afternoons to minimize the amount of moisture lost to evaporation. If your plant is in a pot, check the top soil in the pot either by looking at it or touching it with your finger. In any case, if it hasn’t rained in a month, water !

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