Sweet Flag Calamus - Hardy plant

Acorus gramineus

Sweet Flag Calamus - Hardy plant

Acorus gramineus
Perfect for the small pond or patio barrels!
This striking plant with its white and green leaves, is a low-growing variety of calamus (Acorus gramineus) - very easily grown. As it doesn’t grow so tall, it's really very suited to a small pond or a patio barrel made up as a pond. Also lovely along the edge of ponds and streams. It would also look decorative and grow well on a floating plant 'island'.
Acorus is classified under Acoraceae.
This plant will thrive in shallow water up to 20 cm deep.
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Sweet Flag Calamus - Hardy plant
Latin name: Acorus gramineus
Delivery type: Supplied as container plant
Guarantee: 6 months growth and flowering guarantee
Color: Green,White
Green stayer: No
Leafs all year: No
Hardy plants: Yes
Self polinating: No
Edible: No
Naturalizing: No
Scented: Not Scented
Grafted: No
Cutting flowers: No
Growing Height: 20 - 30 cm
Planting depth: 15 cm

This pond plant, low-growing calamus (Acorus) is best planted in a pond basket. Line the basket with sacking and use special pond medium to fill it. Plant your low-growing calamus in the basket and fill it up with more medium. Cover with the extra flaps of sacking and add a layer of grit or pebbles. Stand the basket around 10-15 cm deep in your pond. If you don't have pond ledges and it's too deep, use bricks to bring the height up. Plant in full sun or part shade.

Using low-growing calamus with other plants

Low-growing calamus (Acorus) is a decorative aquatic that will add a really natural look to your pond. Combine the low-growing calamus, with for example, the Anagallis tenella (bog Pimpernell) and yellow Iris (Iris pseudacorus) along the edge of a (natural or otherwise) pond. These pond edge plants will be sure to attract all kinds of wildlife.


Low-growing calamus (Acorus) is a semi-aquatic that is very undemanding. In autumn snip off all dead foliage and remove it from the pond. The calamus forms rhizomes and is completely hardy.
If the whole plant gets too large, remove the low-growing calamus entirely from the pond and split the rhizome into smaller pieces - replant only one or two smaller sections.


Calamus has white spike-like flowers that are rather insignificant in decorative values. On the other hand the narrow reedy foliage is quite lovely. The calamus forms rhizomes and is completely hardy.
Acorus (Calamus) is classified under Acoraceae. This plant will thrive in shallow water (up to 15 cm deep).


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