Utricularia macrorhiza


Ease to Grow: Easy
Dormancy: Yes, but not required. Forms turions
Native Range: Southeatern United States
Zones: 4-7 (3-9)

Utricularia macrorhiza, Common Bladderwort, is a large growing, perennial, aquatic bladderwort. It grows suspended in the boggy waters with no roots.  Its leaves are finely divided, and interspersed with numerous bladders about 1/8", which turn dark from devouring infusoria, including mosquitoes. It prefers dark, tea colored, boggy waters rich in tannins.  It does best in full sun, growing under and among emergent aquatic plants, such as water lilies, frogbit and pickerel weed. Its flowers reach above the water from May to November. They are large and bright yellow.  As Fall approaches, it forms turions (winter buds), which settle to the bottom, and help it survive winters. If it is grown in temperatures above 55°F (12°C), it will continue to grow through the winter. It can become weedy and invasive in water bogs. This is a great plant for the garden bog pool, and will help reduce the mosquito population.

U. macrorhiza is fast growing, but easier to control than duckweed. It can be an invasive weed in warm climates.  Cultures may contain small amounts of other aquatic plants.

Plants shipped as a 2-4+" sprig with one or more growing tips. In it's dormant season, it will be shipped as a dormant turion.

Length: 18+"
Plant Type: Perennial, temperate
Soil: Bog Water
Light: Bright to partial bright indoors, partial sun outdoors
Use: Grows well indoors and greenhouse.  Great for helping to control mosquitoes.

Customer Reviews

Based on 4 reviews
Well packaged, great plant!

Plant was well packaged, arrived healthy, is growing insanely fast

Tim Krantz
Very disappointed!

We received three "sprigs" of U. vulgaris. All three were ~ 2.5 cm/1 inch long in a vial, brownish-black. No green chlorophyllous stems. We also received one sprig of U. macrorhiza. At least this sprig had some green apical meristem. But really?! $15 a pop for the tiniest "sprig", none of which showed any vestige of life. We represent the Southern California Montane Botanic Garden, so we know something about native plant horticulture, but these were the most pathetic "sprigs" I've ever ordered. Shall we try some more sprigs, this time with a little green on them?

Growing Great!!

The Utric. macrorhiza came as dormant buds, carefully packed in a plastic test tube and ready to add to our tank. Within a day, they were beginning to unfurl, and they are now happily growing and trapping things, just about a week later!

Brobson Lutz
Need a microscope

Needed plants for an outside pond. What arrived were microscopic strands. Maybe what aquarium folks want but wish the website has specified what a small amount of plant material would be sent for a sorta hefty price too. Brobson Lutz, New Orleans

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