Duckweed, or should that be frogweed?

Common Duckweed (Lemna minor) in frogspawn in my old pond today

There’s no duckweed in my old pond – well, until I noticed some yesterday.

Nothing unusual here you might think. Duckweed colonises pond – it’s not exactly news.

But actually there was something unusual about this, as the picture above shows.

It’s associated with the frogspawn – just a few fronds (I counted about 10 altogether) dotted around in the big mat of spawn, and nowhere else.

Why just there? It certainly wasn’t in that part of the pond a few days ago, before the frogs came, or in any other part of the pond (I know: I’ve been watching out for it like a hawk, or perhaps that should be like a duck).

There was definitely none last year.

Although I’ve no way of proving it, it rather looks as though the frogs may have brought it in.


5 Responses to “Duckweed, or should that be frogweed?”

  1. jonspond Says:

    Yep my dad has pictures of frogs carrying pieces of frog sorry duck weed along with Azolla fragments between his ponds – he has four ponds of various sizes – it must be the frogs introducing the different water weeds to pond which did not have any….


  2. Old photos of frogs and duckweed plus Azolla « Blog Archive « Pond at 38 Nursery Rd Blog Says:

    […] Leave a Comment » After reading through Jeremy’s Garden Pond Blog – finding a blog entry on frog introduction of duckweed – Duckweed or should that be frogweed? […]

  3. Update on duckweed…or should that be frogweed « The Garden Pond Blog Says:

    […] the original post is here. Possibly related posts: (automatically generated)Duckweed, or should that be frogweed?At the […]

  4. Sally Says:

    We have managed to keep duckweed out of the new pond so far, but it’s suffering badly with blanket weed. I can’t get it all out as it’s wrapped around plant roots at the shallow end. I have read online that pulling it out spreads the spores so it makes the situation worse. What is the best way to tackle this problem in a wildlife friendly pond?

  5. Jeremy Biggs Says:

    Hi Sally

    If there’s lots of blanketweed I’d be inclined to leave it.

    It looks awful but its a rich habitat – and when you pull it out the things that are living in it have no home left!

    In the end, I think it’s probably encouraged by there being a relatively high level of nutrients, and no competitors.

    But….I also think we’ve got quite a bit to learn about the situations where it grows best.


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