It is quite possible that a passing bird or animal carried it to your pond. It also very commonly comes attached to water plants purchase at garden centres etc. It could have persisted for a while as tiny fragments which you didn't notice.
It would be worth removing all the bits you can see as once it get going it can increase very rapidly!
Quote:
Originally Posted by Tobyh  Hi,
While looking at my pond last night I spotted some water fern, which I read is highly invasive and will take over if not removed asap. My pond has been there since May and hasn't had anything added for a couple of months.
Is it possible that this came in on birds or even animals for that matter? It's weird that it seems to have suddenly appeared - not in huge lumps but only just become noticeable. Does it perhaps sit dormant and this time of year is ideal conditions?
Thanks for any ideas
TobyH |