Guide to Pond Duckweed

My guide will help you to understand duckweed in your pond, explaining what it is, how it can affect the pond, and how you can control it.

Created by Andy Hobson (Alumni) on Monday, 7th of July, 2014.
Updated on Tuesday, 20th of December, 2016.


Duckweed in a garden pond

The common name is Duckweed and it's botanical name is Lemna minuta. It can be a real nuisance, especially if you're trying to keep your pond clear. Many people report that once they've rid their pond of green water and blanket weed the next problem that arises is Duckweed.

The reason for this is because it feeds off the nutrients in the pond, just like green water and blanket weed do too, so once the others are out of the way duckweed is free to feed all it likes, multiplying and covering the pond.

During the Summer duckweed can quickly multiply, especially in slow moving or still water. It has been known to double in quantity at times in one day.

What Does Duckweed Look Like?

It looks like hundreds of tiny leaves around 50mm in size, a bit like water cress they won't get any bigger than this size. They will usually appear in the Spring and sinking to the bottom of the pond in the Winter and surviving, returning next year. It stays green through the Winter so it's easy for you to spot and remove from the pond.

Where Duckweed Comes From

Duckweed can be introduced into your pond by accident on plants you've been given or bought or through animals like birds, this is sometimes unavoidable so be prepared to one day face the problem of duckweed if you have a pond but have not yet experienced it.

The easiest way to stop duckweed from entering the pond on new plants is to isolate them from the pond for a couple of weeks before introducing them, this can also stop blanket weed problems too.

Can it Be Treated?

The best way to manage duckweed is through regular raking and collecting with a pond net to reduce the amount in the pond, you can even use it in your compost too, the nutrients will really help.

The other option is to use a pond duckweed treatment but this can take a few weeks to work, so if you're clearing the pond for a garden party then it's probably best to go with the first option of manual removal.

As it is natural duckweed can easily return through one of methods mentioned above so always be alert.

Further Information

Read my guide to Pond Blanketweed.

 

Related Articles

November Pond Maintenance

November Pond Maintenance

Aquatic expert Dan Everton has this advice on how to maintain your pond during November, when the days are short, frost threatens and leaves are falling from the trees.

Author: Dan Everton

Written by Dan Everton.
Published on Sunday, 30th of October, 2016.

Reasons To Choose An Intalogs or Blagdon Raised Pond

Reasons To Choose An Intalogs or Blagdon Raised Pond

There's no doubt that building a pre-formed or liner pond involves a certain amount of hard work, so Nathan James Dodd thinks that a raised version from Intalogs or a Blagdon is well worth considering.

Author: Nathan James Dodd

Written by Nathan James Dodd.
Published on Thursday, 12th of May, 2016.

How To Transform Your Pond With Plants

How To Transform Your Pond With Plants

A pond is an essential part of the garden landscape, and plants transform their appearance as well as ensuring a healthy aquatic environment. Dan Everton, our Aquatics Supervisor, shares his thoughts on the best plants to use.

Author: Dan Everton

Written by Dan Everton.
Published on Wednesday, 11th of May, 2016.

May Pond Maintenance

May Pond Maintenance

With the weather warming up, May is a good time to introduce new life into your pond and complete any maintenance activities left over from the winter and spring. Dan Everton reviews the tasks that need to be undertaken this month.

Author: Dan Everton

Written by Dan Everton.
Published on Wednesday, 20th of April, 2016.

comments powered by Disqus

RSS

View RSS Feed

Author

Andy Hobson (Alumni)

former Social Media Co-ordinator

View Profile

Follow Us!

Recent Articles

How To Heat Your Greenhouse

How To Heat Your Greenhouse

Heating will be a deciding factor on the variety of plants you are able to grow in a greenhouse and the number of plants that can be kept over winter. Here, Robert Hall goes through the pros and cons of the different types of heating that are available.

Author: Robert Hall

Written by Robert Hall.
Published on Monday, 16th of January, 2017.

Grange Announce New Timber Products For 2017

Grange Announce New Timber Products For 2017

Grange are introducing several new fence panels and gates in 2017 and Andy Taylor has been looking at these fresh additions to their already impressive collection of timber products.

Author: Andrew Taylor

Written by Andrew Taylor.
Published on Friday, 13th of January, 2017.

Safe and Secure Shopping on GardenSite

Safe and Secure Shopping on GardenSite

With the security of online purchases and protection of personal information a priority for our customers, David Coton is pleased to announce that gardensite.co.uk is now fully secure across the whole site.

Author: David Coton

Written by David Coton.
Published on Tuesday, 10th of January, 2017.

Palmako Timber Garden Houses Now Available

Palmako Timber Garden Houses Now Available

Palmako are one of Europe's leading manufacturers of garden buildings using high quality Nordic timber, and David Coton is pleased that GardenSite can now offer their new range of versatile and beautifully constructed garden buildings.

Author: David Coton

Written by David Coton.
Published on Tuesday, 10th of January, 2017.