Dahlias forum: What the heck is this?!

Views: 257, Replies: 6 » Jump to the end
Name: Jennifer
48036 MI (Zone 6b)
Cottage Gardener Houseplants Spiders! Heucheras Frogs and Toads Dahlias
Hummingbirder Sedums Winter Sowing Peonies Region: Michigan Garden Ideas: Level 2
Image
jvdubb
Oct 23, 2015 5:51 PM CST
This was part of one of the dahlias I dug up today. Anyone have any clue what it is?


Thumb of 2015-10-23/jvdubb/98b27a
Thumb of 2015-10-23/jvdubb/499f0f
Thumb of 2015-10-23/jvdubb/412604

Name: Geof
NW Wisconsin (Zone 4b)
Region: Wisconsin Dahlias Garden Ideas: Level 1 Celebrating Gardening: 2015
Image
mandolls
Oct 24, 2015 6:04 AM CST
I believe that is crown gall - though I have never seen it so big! I am afraid you should toss those.

http://www.dahlias.net/dahwebpg/Disease/CrnGall.htm
Name: Jennifer
48036 MI (Zone 6b)
Cottage Gardener Houseplants Spiders! Heucheras Frogs and Toads Dahlias
Hummingbirder Sedums Winter Sowing Peonies Region: Michigan Garden Ideas: Level 2
Image
jvdubb
Oct 24, 2015 7:08 AM CST
Oh no, I have no idea now which dahlia it came off of. Of course I threw the gall out. But I divided 43 clumps yesterday. No way to remember!
Name: Jennifer
48036 MI (Zone 6b)
Cottage Gardener Houseplants Spiders! Heucheras Frogs and Toads Dahlias
Hummingbirder Sedums Winter Sowing Peonies Region: Michigan Garden Ideas: Level 2
Image
jvdubb
Oct 24, 2015 7:10 AM CST
Oh and it certainly did NOT affect the health of the dahlia, whichever one it was. I only had one sickly dahlia and that was more because of poor placement. I would remember if it came off that plant.
Name: Jennifer
48036 MI (Zone 6b)
Cottage Gardener Houseplants Spiders! Heucheras Frogs and Toads Dahlias
Hummingbirder Sedums Winter Sowing Peonies Region: Michigan Garden Ideas: Level 2
Image
jvdubb
Oct 24, 2015 8:43 AM CST
More reading, it is caused by a soil bacterium. So I should not plant dahlias in that spot for at least two years. Now I really wish I knew which one it was. Grrr

The only bright spot is that I read it only enters through a wound.

I'll have to practice better management next year.
Name: Geof
NW Wisconsin (Zone 4b)
Region: Wisconsin Dahlias Garden Ideas: Level 1 Celebrating Gardening: 2015
Image
mandolls
Oct 24, 2015 12:42 PM CST
I am afraid I don't really know much about it. I remember seeing it on one of my tubers one year, before I understood that it was a disease. I don't remember if I tossed mine or not, and I didn't see it again the following years.

So........I wouldn't worry about it to much. It doesn't seem to spread viruntly from plant to plant.
Name: Frank Richards
Clinton, Michigan

Garden Ideas: Master Level Celebrating Gardening: 2015 Plant Identifier
Image
frankrichards16
Oct 24, 2015 9:04 PM CST
@jvdubb, I have experienced such growth. I agree with @mandolls.

« Garden.org Homepage
« Back to the top
« Forums List
« Dahlias forum
You must first create a username and login before you can reply to this thread.

Today's site banner is by Baja_Costero and is called "Agave"