Help us achieve our goals:
make a donation »
Join the RHS today and
support our charity
Free personalised gardening advice
RHS members get reduced ticket prices
RHS members get free access to RHS Gardens
Reduced prices on RHS Garden courses and workshops
020 3176 5800
Mon – Fri | 9am – 5pm
Make a donation
Join the RHS today and support our charity
I have forgotten my password
Keep me signed in
Register for free to receive our newsletters, add comments to blogs/articles and to save content.
Few garden plants will survive waterlogging or flooding. Prolonged periods of sitting in ground saturated with water causes yellow leaves, root rot and death. However, conditions can be improved using various techniques to promote drainage and prevent damage.
Soils become waterlogged when water builds up, unable to drain away. This leaves no air spaces in the saturated soil, and plant roots literally drown.
Short-lived flash floods after a downpour seldom harm most plants. It is prolonged, saturated soil that cause the most damage.
Symptoms of waterlogging are not easy to tell from other disorders but look for the following;
Some of the symptoms are easily confused with water stress (too little water). But in fact, a waterlogged plant actually is water stressed. This is because the roots are drowning and can not absorb any water or nutrients to move around the plant.
Excess water causes problems for plants in a number of ways;
Bog gardensChalky soilsChalky soils: plants forClay soilsClay soils: plants forFront Gardens bookletFront gardens: permeable pavingGardening on wet soilsPhytophthora root rotWaterlogged lawns Wet and dry soils: plants forWet soils: plants for
the RHS today and get 12 months for the price of 9
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
Register for the site or sign in to share your experiences on this topic and seek advice from our community of gardeners.
Jon Hopworth on 02/09/2015
It's not totally necessary to but can be useful, especially to help keep in moisture in hot weather.
Jon Hopworth on 25/08/2015
This is a great post. When we flooded almost all of my plants were damaged. I had a lot of problems myself with my garden an allotment.
I have written a post specifically about allotments here if any information is missing - https://keepingitcovered.wordpress.com/2014/03/11/recovering-your-allotments-from-floods-what-to-do/
Ann Grieves on 09/09/2014
is it a good idea to line raised beds?
We're a UK charity established to share the best in gardening. We want to enrich everyone's life through plants, and make the UK a greener and more beautiful place.
Join the RHS today and get 12 months for the price of 9