canna virus

sleuthtl73July 6, 2014


This is my first message here. I live in France. I'm not an expert in gardening.
I have a few cannas in my garden. I got some of them from gifts, or I grew them from seeds.
I'm very much concerned about the canna viruses. I'm trying to keep my cannas healthy. I think i will stop getting new cannas in order to keep the ones i own safe.

I have a few big cannas (I think they are canna 'Robert Kemp') which are beautiful. They are planted en-mass. A few years ago it was 3 little pieces of rhizomes I found in my garden, and they have grown quickly. At this time of the year, they are just starting to flower.

Yesterday I noticed that one side of the "bunch" (is it th correct word ?) had strange leaves. I hope one of the plants did not get a virus.

What should I do ? Remove this part of the cannas, digging out the rhizomes (and hope the other plants didn't get the disease yet), or wait to confirm they are heathy or sick ? I know the first leaves can sometimes be ugly on cannas.
The other plants in these canna R.Kemp seem alright to me.

I collected a lot of seeds from this canna last year, so I can grow a few of them to replace diseased plants... but I will have to wait for a year or two until they reach the full height.

ps : English is not my mother tongue, so feel free to tell me if some words are inaccurate.

Thank you for reporting this comment. Undo

Welcome to the Garden Web and thanks for posting. Your English is fine.

Your concern for virus is well taken but we might better understand your plants conditions with a photo attached. First let me say that in general canna virus infections typically do not affect only a portion of the plant. In other words, if the affected plant is "growing from the same planted rhizome" the entire plant should show the same symptoms.

To be on the safe side I would suggest you remove the affected plant. You can transplant it to a distant location away from your other cannas and observe it for this season or simply destroy it and remove the risk.

The cannas you are growing from seed have very low risk of having virus unless it is transmitted by other virused canna plants.



    Bookmark   July 6, 2014 at 11:10PM
Thank you for reporting this comment. Undo

Hello, and thanks for your reply.
You're right, I should have posted photos. Here they are :

Some leaves show weird yellow spots (photos 1-3):

However in the middle of this leaves, some of them look quit normal to me (they were eaten by slugs and snails, but the colour seems right) (photos 4-5)

On the other side of the bunch the leaves look ok (photo 6)

Do you think the first photos show the symptoms of a virus ?

Best regards,

Here is a link that might be useful: photos

    Bookmark   July 8, 2014 at 1:32PM
Thank you for reporting this comment. Undo

Thank you for posting your canna photos. Unfortunately, in my opinion the first three photos definitely show typical potyvirus infection symptoms. Assuming your other cannas appear healthy I would remove these plants. We can only hope none of your other cannas have been infected.

One of the real dilemmas for canna growers is the fact that at times and under prime growing conditions the virus symptoms seems to disappear. The plants rapid growth seems to outgrow the rate of the virus infection and in effect mask the infection. The sad truth is the plant is still infected and capable of passing the virus on via sucking insects to healthy cannas. There is no cure for the infected plant or the rhizome it grows from.

If there is silver lining to this story it may be that I have not found in recent years virus transmission from seed collected from virused cannas. That is not a scientific confirmations but only my personal experience. Unfortunately seed harvested from our hybrid cultivars due not breed true.

Good luck,


    Bookmark   July 8, 2014 at 10:55PM
Thank you for reporting this comment. Undo

Thanks for these informations.
I guess I will remove this plant as soon as possible. I just hope it didn't infect the nearby plants. I will see how they evolve through the summer.
Two more questions :
- Is it safe to plant new cannas on the same spot next year ?
- What should I do with the tools afterwards ? Is it safe to just wash them after I used them to dig out the rhizomes ?

Best regards,

    Bookmark   July 9, 2014 at 4:27PM
Thank you for reporting this comment. Undo

The most important issue is to be sure to remove each piece of the rhizome. If you leave this area vacant for the balance of the season there should be no issue with replanting cannas there next year.
Your tools should not be a problem if you simply wash off the soil and let them thoroughly dry.
I hope this all works out for you.


    Bookmark   July 9, 2014 at 9:00PM
Sign Up to comment
More Discussions
another use for 100 mph tape
Scarification we've all been there. But No matter what...
bragu_DSM 5
Leaf rollers
I had one canna this year that had leaf rollers in...
Wanted 2 foot canna
I'm looking for a dwarf canna that only gets about...
Canna ID (1)
Hello, I don't know the name of some of my cannas....
When right time to cut down
I have about four or five Canna's growing in a 3' x...
Sponsored Products
Kaz - Honeywell 50250-S Life Time HEPATM Permanent Filter Air Purifier Multicolo
$179.00 | Hayneedle
Mosquito Magnet Quick Transparent Cartridge
Airocide Wall Mount Kit
$39.50 | FRONTGATE
3m FAP01-RS Small FiltreteTM Ultra Quiet Air Purifier - 2965-6063
$119.99 | Hayneedle
3m FAP02-RS FiltreteTM ultra-clean air Purifier For Bedroom - 2965-6006
$134.99 | Hayneedle
Oasis Black Hot/Cold Countertop Water Bottle Cooler
$379.00 | FRONTGATE
3m FAP03-RS FiltreteTM ultra-clean air Purifier For Living Room - 2965-6014
$199.99 | Hayneedle
Airocide Replacement Cartridge Kit
$99.50 | FRONTGATE
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™