Lake quillwort
Isoetes lacustris
Isoetes
Isoetaceae
Native Plants
Zone 5–9
🐾 Pet-Safe
Lake quillwort is a specialized aquatic plant that requires permanent submersion in soft, acidic water. This ancient fern ally needs cool temperatures and excellent water quality to thrive. Best suited for experienced aquarists with dedicated pond or aquarium setups.
Care Requirements
Care Level
High
Sun
Partial Sun
Water
Moderate
Growth Rate
Moderate
Mature Height
18″ – 36″
Soil
loam
Life Cycle
Perennial
Spacing
4″
Watering Schedule
Continuously Submerged • Must Remain Completely Submerged In Soft Water
Soil pH
5 – 5.5
Temperature
-20° – 95°F
Mature Spread
up to 24″
Root Depth
Medium
Foliage
Medium
Ecology & Origin
Native to
Altay
Austria
Baltic States
Belgium
Bulgaria
Central European Rus
Connecticut
Czechoslovakia
Denmark
East European Russia
Finland
France
Føroyar
Germany
Great Britain
Greece
Greenland
Iceland
Ireland
Irkutsk
Sources
Data: trefle, usda
Image: trefle.io — Taken Jul 11, 2013 by Tela Botanica − Liliane Roubaudi (cc-by-sa)
Hardiness Zones
1
2
3
4
5
6
7
8
9
10
11
12
13
Available From (0)
No nurseries currently have this species in stock.