Hornwort aka Coontail (Ceratophyllum demersum)

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Minimum Purchase:
5 units
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Product Overview

Hornwort aka Coontail (Ceratophyllium demersum)

Hornwort is an excellent submerged oxygenating plant. Hornwort resembles an underwater juniper bush, with multiple branches of thick, dark green foliage, and is a US native.

In warm weather Hornwort grows quickly underwater; it will be dense in high light, and much looser in low light. It does not develop roots, so it is not necessary or even desirable to pot it--like other submerged pond plants, it absorbs nutrients from the water and is especially good at keeping water clear. Baby fish love to hide in this submerged plant.

In winter Hornwort may lose some needles (leaves), but generally stays green so long as it is below the ice.

Use one bunch for every 2 square feet of surface area. Hornwort usually stays near the bottom except when there is not enough light; then it stays closer to the surface. When first placed in the pond Hornwort may tend to float, but usually settle near the bottom when the trapped air bubble are absorbed into the water. If you like you can rubberband pieces to a small rock and gently release them to sink, but this is usually not needed.

We originally sold Hornwort weighted with lead, and later offered lead strips for sinking them, but we no longer do this as lead is toxic to pond life, tight clumps promote rotting, and Hornwort will eventually find its optimum level in the pond on its own. For the last few years we sold Hornwort rubberbanded together in clumps, but this encourages customers to plant or release them that way, and a tight clump just rots at the band, so now we sell loose clumps (one clump is approximately 1 cup of strands and eaves). 

Hornwort may also be used in aquariums!

Minimum purchase of 5.

Hardiness Zone: 5-11
Light Requirements: Full Sun to part shade
Height: submerged
Water Depth: 1' - 15', so long as water is clear enough for light to penetrate.

Cannot be shipped to Puerto Rico.


(20 reviews) Write a Review

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  • 4

    Posted by Roxanne Franzen on Jun 23rd 2022

    Of the five bunches I received 2 had only 2 stems. so far all that I received are surviving

  • 5

    Posted by Theresa Wilson on May 4th 2022

    Arrived fresh and packaged well. Good looking, healthy plants.

  • 5
    Nice healthy plants

    Posted by Nathan on May 26th 2021

    After unsatisfactory aquatic plants from other sites I found lilyblooms, the plants show up quickly and healthy, I have now purchased from them 5 times. Thanks

  • 5
    Great plants

    Posted by Elizabeth Clift on Apr 28th 2021

    The hornwort arrived very quickly. It was healthy and ready for the pond. Bunched together for easily attaching weights. Just what the pond needs to stay clear and beautiful. Thanks.

  • 5

    Posted by Daniel on Apr 13th 2021

    Hornwort arrived quickly from across the country, was packed well and arrived wet and hydrated. plants look full and healthy

  • 5

    Posted by JP on Apr 10th 2021

    Looks good and healthy

  • 5
    The Hornwort that I ordered, was shipped within a few days, came very well packaged and were very much in great shape.

    Posted by Mary Lynn Filipkowski on Jun 1st 2020

    Will order from LilyBlooms again (next year).

  • 5

    Posted by Libby on May 20th 2020

    Plants looked great, nice size, and at good price

  • 5
    very quick response, came in perfect condition with good instruction

    Posted by Edyta Werbanowski on May 10th 2020

    i was greatly suprised how much of a product i received. i knew it was going to be cuttings, but they were big, healthy and much more of them then i expected. Great service and i will for sure order again. Thank you