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A few leaves or flowers may drop during transit. This is completely normal — plants settle and bounce back within a few days of basic care.

Sweet Flag

Save 17%

₹239

₹239 - ₹239

₹239

₹199

₹199 - ₹199

₹199

(MRP Inclusive of all taxes)

Quantity

Why it’s special?

Aromatic medicinal rhizome (bach)
Thrives in bog and pond margins
Fragrant sword-shaped foliage
Hardy and low maintenance
Variegated ornamental forms available

Flat ₹79 delivery on every order

🌎 Country of origin: India

Sweet flag, or bach, is an aromatic semi-aquatic perennial grown along pond edges, marshes and moist ground for its fragrant, sword-shaped leaves and medicinal rhizome. The narrow, upright foliage releases a sweet, spicy scent when crushed and forms attractive clumps in wet soil or shallow water. The rhizome is widely used in Ayurveda and traditional medicine. Adaptable and hardy, it thrives in boggy spots, water gardens and large containers kept constantly moist. Variegated forms add ornamental value to pond margins. Easy to grow given enough moisture, sweet flag is both a useful herb and a handsome waterside plant.

Specifications

Family	Acoraceae
Native region	Asia, widely naturalised
Mature height	0.6-1 m
Mature spread	Spreading clumps via rhizome
Growth rate	Moderate
Foliage	Sword-shaped, aromatic green (sometimes variegated)
Flower colour	Greenish-yellow spadix (inconspicuous)
Flower season	Summer
Climate zone	Temperate to subtropical wetlands

Care guide

Sunlight	Full sun to partial shade
Watering	Constantly wet; boggy soil or shallow water
Soil / mix	Heavy, rich, waterlogged or marshy soil
Temperature	10-35 C; hardy
Humidity	High; aquatic margins
Fertilizer	Occasional aquatic plant feed
Pruning	Remove old or damaged leaves
Repotting	Divide rhizomes every 2-3 years
Propagation	Division of rhizomes
Pests & problems	Generally pest-free
Toxicity / safety	Rhizome medicinal but not for casual consumption
Difficulty	Easy

Uses

Grown for its aromatic, medicinal rhizome used in Ayurveda and as a fragrant marginal plant for ponds and water gardens. Variegated forms are valued ornamentally.

Growing tips

In India, grow sweet flag in constantly wet, boggy soil or shallow pond margins in sun to partial shade. Keep it from ever drying out and divide the spreading rhizomes every few years to refresh clumps.

Sweet Flag Care

Sweet Flag (Acorus calamus) is a moisture-loving marginal plant that thrives in consistently wet or waterlogged soil, making it ideal for pond edges, bog gardens or a saucer-standing pot that never dries out. Give it full sun to partial shade and it will send up upright, sword-like aromatic leaves through the growing season. Keep the soil boggy, top up water in summer, and divide the rhizomes every couple of years to keep clumps healthy.

Sweet Flag Benefits & Uses

Long valued in Indian gardens and traditional Ayurveda, where the aromatic rhizome is known as vacha or bach, Sweet Flag is grown both as an ornamental marginal and for its fragrant foliage. The leaves and roots release a sweet, spicy scent when crushed, and the plant works beautifully to soften pond margins and water features. Its grassy, iris-like habit adds vertical structure to boggy corners where few other plants will grow.

Where to place Sweet Flag

Position Sweet Flag at the margin of a pond, in a water bowl, or in any low-lying spot that stays damp, since it will not tolerate drying out. It suits container water gardens on a balcony or terrace as long as the pot sits in a tray of water. A site with plenty of light gives the strongest upright growth and the best leaf fragrance.

Why buy Sweet Flag online in India

Buying Sweet Flag online from GardenGo means the plant is sourced locally and delivered fast — often within about two hours in serviced areas — so this water-loving marginal reaches you fresh and hydrated rather than stressed after days in transit. You can pick the size that suits your pond or container right on this page. And because GardenGo stocks pots, aquatic soil and tools too, you can order everything for your water garden in one go.

Frequently asked questions

How often should I water sweet flag?

Keep it permanently wet; grow it in boggy soil or shallow water and never allow the roots to dry out.

How much light does sweet flag need?

It grows well in full sun to partial shade, with full sun giving the most compact, vigorous clumps.

Is sweet flag safe for pets?

Keep pets from chewing it; the aromatic rhizome is a traditional medicine and not meant for casual consumption.

Do I need to repot or divide sweet flag?

Divide the spreading rhizomes every two to three years to keep clumps healthy and to propagate.

How do I propagate sweet flag?

Lift and cut the rhizome into sections, each with a growing point, then replant in wet, rich soil.

Why are my sweet flag leaf tips browning?

Browning tips usually mean the soil dried out; keep it constantly wet, as it cannot tolerate drought.

Does sweet flag flower?

It produces a small, inconspicuous greenish-yellow spadix in summer, but it is grown for foliage and rhizome.

Can I grow sweet flag indoors?

It can grow in a water-filled container or bog pot in bright light, provided it stays constantly wet.

Is sweet flag toxic to humans?

The rhizome is medicinal but some forms contain compounds best avoided in large doses, so do not self-medicate.

What fertilizer does sweet flag need?

It is a light feeder; an occasional aquatic plant fertilizer in the growing season is enough.

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Sweet Flag