Bladderworts (Utricularia)

CARING FOR BLADDERWORTS

Utricularia spp.

There are two general growth types for Utricularia, free-floating aquatic and wet terrestrial (includes epiphytic). Most of the bladderworts in cultivation are the wet terrestrial types. An exception is U. gibba which can be found in planted aquariums - usually as a weed. Bladderworts have tiny bladder-like traps which catch minuscule critters. The terrestrial types are some of the easiest carnivorous plants to keep and certain species can become weeds in cultivation (and also nature!). Keep these species quite moist, and flood them once a week or so. They can be grown under lights, on a windowsill, in a terrarium, or in a bog garden if the species is hardy. Bladderworts tend to be fragile plants and do not thrive if allowed to dry.  They grow well at the feet of pitcher plants or under the water of a tray. Refer to another carnivorous plant care sheet (Sarracenia or Venus flytrap) for general information regarding water and soil mixes.

Utricularia subulata is quite hardy and is native to much of the world. Tiny bright yellow flowers carpet the soil. Good in bog gardens, terrariums or on a windowsill. A pleasant weed.

Utricularia livida is native to subtropical climates of southern Africa and Mexico. Pretty white and lavender flowers appear continuously when it is warm and sunny. Good for windowsill or terrariums.  Not winter hardy, though it can handle light frost.

Utricularia dichotoma is native to South America. Large pale violet flowers for a Utricularia — one inch! Not winter hardy.

Utricularia sandersonii is native to South Africa. Dainty little white flowers look like little bunnies, thus the common name of Rabbit's ears. Good for windowsills and terrariums.  Not winter hardy.

Other sources:

• The International Carnivorous Society Growing Guides