Typha laxmannii, known as slender reedmace or Laxmann's bulrush, is a slim reedmace with long, slender, grey-green leaves. In summer it carries green-yellow flower spikes that age to brown, cylindrical seed heads, which last into winter.

Slender reedmace at a glance

Botanical name Typha laxmannii
Common name Slender reedmace, Laxmann's bulrush
Plant type Upright, spreading perennial; dies back in winter
Height and spread About 1–1.5 m tall, spreading 1–1.5 m or more
Flowers Green-yellow spikes in summer, ageing to brown seed heads that last into winter
Position Full sun
Soil Wet, fertile soil or water; any pH
Pond depth 0–30 cm of water
Hardiness RHS H6 – hardy in a very cold winter (-20 to -15°C)
Native to Not UK native

Is slender reedmace invasive?

It can be. The RHS says it spreads rapidly in shallow water, may become a nuisance and needs managing, and that its roots may puncture pond liners. It is legal to buy and grow in a garden in Great Britain (in Scotland it is an offence to plant it in the wild), but it is treated as invasive in parts of the USA. Grow it in a mesh basket and keep it away from natural water.

How to plant and care for it

Plant in full sun in a basket, in up to 30 cm of water. The seed heads burst and shed fluff, so cut them off by late winter or early spring. It is generally free of pests and diseases.

Which size should I buy?

Bare-root plants (7 cm, 9 cm, 1 litre and 3 litre) arrive without a pot or compost and are the most economical way to plant a group. Potted plants (9 cm, 1 litre and 3 litre) arrive growing in our peat-free compost and give a faster display. Packs of 3 come in 7 cm, 9 cm, 1 litre and 3 litre bare-root sizes and cost less per plant. The 2x Pot & Compost option is two plants supplied with pots and compost.

Pond depth: 0 - 30cm

Light: Full sun

Hardiness: Hardy

Height and spread: 120cm+ tall, 100cm+ wide

Planting and flowering months are shown in the calendar under the photos.

Bare root (7 cm, 9 cm, 1 litre, 3 litre): plants sent without a pot or compost, ready to plant straight away. The most economical way to plant a group.

Potted (9 cm, 1 litre, 3 litre): plants growing in our recycled, peat-free compost made in Lincolnshire. Larger sizes give a faster display.

Pack of 3 (7 cm bare-root, 9 cm bare-root, 1 litre bare-root, 3 litre bare-root): three plants of the chosen size at a lower price per plant.

2x Pot & Compost: two plants supplied with pots and compost.

Sizes shown with a line through them are currently unavailable.

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