Irish Gardeners Forum Home
 FAQFAQ   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
Custom Search
Weather Report /
Moon Phase for Ireland

Post new topic   Reply to topic    Irish Gardeners Forum Home -> Water features in Ireland, including all aspects of water gardening.

Japanese Koi Pond / Water Garden

Most Recent Posts Not Valentines day but so funny
Last post: Margo
Tomato plants in Lidl self watering pots
Last post: Digger Dan
Best wood to use for a raised bed
Last post: Blowin
Announcement: I'm Back with free tickets to Bloom 2018.
Last post: James Kilkelly
Author Message
James Kilkelly
Rank: Site Admin

Joined: 30 May 2006
Posts: 2165
Location: West of Ireland

PostPosted: Sat Dec 16, 2006 8:40 pm    Post subject: Japanese Koi Pond / Water Garden Reply with quote

Japanese Koi Pond/Water Garden
by: RC Moore

There are a lot of people that will tell you not to put Japanese Koi and plants together.
Pet stores and internet articles suggest that koi will destroy any plants you put in your pond.
I have been keeping Japanese Koi in my water gardens for six years without any Koi destroying any of the plants.
The plants provide shade and shelter for the koi when spooked, and add to the water clarity.

Japanese Koi are by far the most beautiful and desirable fish you can keep in an outdoor water garden.
In Japan, breeding koi has occupied a position between hobby and art form for more than two centuries.

Koi, photo / pic / image.

To keep Japanese Koi in a water garden you have to understand that they are bottom feeders who are most at home rooting around, in and among the rubble found on the bottom of their natural environment.
As a matter of fact, the purpose of the famous whiskers is to help them root around more efficiently in the rocks/ rubble.
Putting a layer a gravel in your pond will give the koi something to root in and will also add to the natural biological environment.
Plants will also benefit from being directly in the gravel.
I always remove plants from their pots, and rinse the roots before planting in a bed of gravel, which adds to the natural beauty of the water garden.

It is true that koi eat plants
It is also true that in the warm summer months they are none stop foragers.
I describe them as eating machines.
That is why it is important to keep plants they can eat without destroying.
My two favorite are watercress and marsh betony planted in a shallow high water flow area.
Trust me, you will need the koi to help you keep these invasive plants in check and may still have to thin late in the season.
These plants are excellent filters which will help keep the water crystal clear and the koi happy.

Floating water hyacinth can result in the koi eating the roots.
I usually plant in the shallow stream just below the waterfall.
Their roots bury deep in the gravel to provide excellent filtration. They tend to grow taller and bloom less.
Mine have grown 3 foot tall and extend 12 feet down the stream and seem to benefit from the splashing of the waterfall.
This is another plant that will have to be pulled in autumn.
Pickerel Rush is another plant that enjoys the splashing from a waterfall.
I use them to hide the liner below the waterfall and they have bloomed constantly all season.

About The Author
RC Moore,

Gardening books. Ireland's allotments.
On Twitter...

Garden Consultation & Design.

Try my Garden Design home study course!
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic    Irish Gardeners Forum Home -> Water features in Ireland, including all aspects of water gardening. All times are GMT
Page 1 of 1


Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You can attach files in this forum
You can download files in this forum

Powered by phpBB © 2001, 2005 phpBB Group

Privacy Policy | Copyright © 2006 - 2018 (part of