Onion Plant

Water Onion

Picture of an Onion PlantOnion PlantCrinum thaianumPhoto © Animal-World
Latest Reader Comment - See More
So I planted some Water Onion bulbs a couple of days ago and on some of the bulbs there is some white cloudy stuff starting to appear and I wasn't sure exactly what... (more)  jordan

   The Onion Plant is a great and hardy plant for many aquariums because it's leaves are extremely tough, making it suitable for aquariums with larger fish!

Onion Plants are easy to care for and adapt well to most aquarium environments. They can grow to an impressive height of 60 inches (150 cm), with their leaves being about 0.8 inches (2 cm) across. Their leaves are extremely long and ribbonlike, and will start growing along the surface of the water once they reach it. Once they are well established you can cut the leaves back some to keep them from growing too long. Because of their height and long leaves they make great background plants for aquariums.

As long as the light is kept moderate to bright, Onion Plants will expend a moderate growth rate. As stated above, they adapt easily to most environments, so as long as the water is kept fertilized with nutrients, the water is cleaned on a regular basis, and the ph is kept around neutral, this plant should thrive. It is also relatively easy to propagate by simply planting the daughter bulbs that are produced.

For more Information on keeping a planted aquarium see:
About Planted Aquariums, Adding Aquatic Plants For a Healthy Aquarium

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Distribution:    They originate in Thailand.

Water conditions:    Temperature: 72-86° F (22-30° C)
   pH: 5.5 - 7.0
   dCH: 2-10

   Light level: Moderate to Bright

Propagation:    The Onion Plant propagates by way of daughter bulbs.

Availability:    Onion Plants are readily available.

Author: Jasmine Brough
Lastest Animal Stories on Water Onion Plant

jordan - 2012-06-03
So I planted some Water Onion bulbs a couple of days ago and on some of the bulbs there is some white cloudy stuff starting to appear and I wasn't sure exactly what that was? Should I remove the bulbs? Is this dangerous to my fish? Any information would be helpful and thank you in advance!

  • alex - 2014-04-05
    The white cloudy stuff is probably mold?
  • tracy - 2014-12-28
    does it resemble a blister/bubble? if so, i think it's okay. just means that it's growing :)
alex - 2011-06-26
I bought some moneywort from petsmart, and a leaf of onion plant made it into the bag (and my tank), do you think this will grow?

  • Charlie Roche - 2011-06-27
    Might as well try. Usually they propagate via the offshoot bulbs. I have no idea if a leaf can actually root but no reason not to try. Right?
  • Alan - 2014-03-28
    If you haven't got your answer. NO... The leaf will not produce roots with this plant.
maria - 2012-10-17
Hiya, i want to know if you are still interested in the water onion bulbs. We can provide. Contact +237 96571005 or email. regards

  • Angel - 2013-03-08
    How much do you want for the water onions? Please email me.
  • judy mayes - 2013-03-14
    do you have the Onion Plant if so please let me know with details please
Ngo Huong Tra - 2010-11-16
Maybe this is kind of stupid, but is this plant edible? (eat-able?)

  • spencer - 2011-01-07
    To you, it tastes horrible but to the fishes, it tastes nice.
  • Angie - 2012-01-26
    It's NOT an actual onion.

    It's poisonous if ingested. Most fish and other aquatic life leave it ALONE due to the fact, that it doesn't taste good to them.

    Hoped I helped! :D