Northern Water Plantain (Alisma triviale)

Northern Water Plantain

Alisma triviale

Alisma triviale, known as Northern Water Plantain, is a perennial aquatic plant reaching heights of 1 to 3 feet. It features oval to lance-shaped leaves and delicate clusters of small, white flowers that bloom from late spring to early summer. This species thrives in shallow freshwater habitats such as marshes, ditches, and pond edges, preferring muddy or sandy soils. Northern Water Plantain is beneficial in naturalizing wetland areas and supporting aquatic ecosystems.

Characteristics

Type	Forb
Sun	Full Sun
Soil	Loam, Sand/Gravel
Moisture	Wet, Aquatic
Average Max Height (inches)	20
Suggested Plant Spacing (inches)	8
Bloom month(s)	June, July, August, September
Bloom Color or Type	White, Yellow
Dominance	High

Range Maps

Sowing Information

Sow seed onto a firm, weed-free seedbed. Hand-broadcast seed making two perpendicular passes for even coverage. If planting a mix, broadcast the grass component first and lightly rake/drag it into the top 1/8–1/4" of soil. Next, broadcast wildflower/forb seed and press it into the soil surface (with a roller/cultipacker or the back of a rake) to ensure good seed-to-soil contact. After seeding, apply a very light layer of clean, seed-free straw (or other weed-free, site-appropriate mulch) to reduce erosion and retain moisture without smothering seedlings. A good rainfall or thorough watering will help settle seed and mulch and improve germination.

Planting Information

Dig a hole in your planting site slightly larger than the plant’s root system. When placing the plant into the hole, ensure that the soil line remains consistent with its original level in the pot. Fill in around the roots with the excavated soil, gently firming it to eliminate air pockets. Water the plant thoroughly the same day to promote successful establishment.