Dahlias forum: Stooling Dahlias

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Salt Spring Island, BC (Zone 8b)
Dahlias Region: Pacific Northwest Million Pollinator Garden Challenge
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islander
Jun 1, 2017 3:43 PM CST
I'm pretty sure I did it too late last year but when is the best time to mound up soil around the main stalk of a Dahlia? Thank You!
He who plants a garden plants happiness.
Name: Geof
NW Wisconsin (Zone 4b)
Region: Wisconsin Dahlias Garden Ideas: Level 1 Celebrating Gardening: 2015
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mandolls
Jun 2, 2017 7:31 AM CST
?? I have never done that - I just plant them deep.
Name: Arlene
Southold, Long Island, NY (Zone 7a)
I was one of the first 300 contributors to the plant database! Tomato Heads Houseplants Garden Ideas: Level 1 Photo Contest Winner: 2014 Celebrating Gardening: 2015
Plant Identifier Million Pollinator Garden Challenge
pirl
Jun 2, 2017 8:56 AM CST
Maybe I need someone to dig deep holes. Age has its limits and digging deep holes is not my strong point. I only mounded up soil around two of them.
Salt Spring Island, BC (Zone 8b)
Dahlias Region: Pacific Northwest Million Pollinator Garden Challenge
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islander
Jun 2, 2017 11:07 AM CST
I was told to mound up the soil on Dahlias to produce more tubers. I did it late last year and I didn't get them producing more tubers. Should I be doing this now or soon?
He who plants a garden plants happiness.
Name: Mary Stella
Anchorage, AK (Zone 4b)
Peonies Ponds Dahlias Canning and food preservation Lilies Permaculture
Garden Ideas: Level 2
Oberon46
Jun 3, 2017 8:56 AM CST
I never heard of that either. Sounds like something you do with potatoes to increase their production. An interesting thought. But potatoes seem to mound up as the potatoes grow from the bottom roots and push the potatoes toward the surface. Not good if they get sunlight as they turn green. I don't know if the mounding is to increase production or just to protect the top layer of potatoes.

Dahlias tubers don't seem to grow like that. I have some huge tubers and they reach down - not forcing their way to the surface.

Edited: I found this at the Dahlia Barn site. They show rows of dahlias in hills like potatoes.
"We find that planting in rows and mounding up your soil will benefit in many ways. See example below. The mound doesn’t have to be too tall, approximately 6″ will be enough. The soil will drain better, be warmer and the soil will be softer for the dahlia to stretch out create it’s tubers"
[Last edited by Oberon46 - Jun 3, 2017 8:59 AM (+)]
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Salt Spring Island, BC (Zone 8b)
Dahlias Region: Pacific Northwest Million Pollinator Garden Challenge
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islander
Jun 3, 2017 11:52 AM CST
Dahlia Barn has a great write-up about Dahlia care. I thought the mounding of soil was so that more tubers were produced higher up. I guess I'm wrong. Thanks for pointing out that site.
He who plants a garden plants happiness.
Name: Mary Stella
Anchorage, AK (Zone 4b)
Peonies Ponds Dahlias Canning and food preservation Lilies Permaculture
Garden Ideas: Level 2
Oberon46
Jun 3, 2017 9:06 PM CST
Well, they do recommend hilling but not for the same reason as potatoes. But still not a bad practice.
Name: Frank Richards
Clinton, Michigan

Garden Ideas: Master Level Celebrating Gardening: 2015 Plant Identifier
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frankrichards16
Jul 11, 2017 3:51 PM CST
I thought mounding or trenching dahlias was to allow easy irrigation.
Salt Spring Island, BC (Zone 8b)
Dahlias Region: Pacific Northwest Million Pollinator Garden Challenge
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islander
Jul 11, 2017 3:55 PM CST
I may have misunderstood someone at the local Dahlia society or maybe they just gave me misinformation. I think you're right, though. I'll be trenching the sides of my Dahlia beds for improved winter drainage.
He who plants a garden plants happiness.
Name: Mary Stella
Anchorage, AK (Zone 4b)
Peonies Ponds Dahlias Canning and food preservation Lilies Permaculture
Garden Ideas: Level 2
Oberon46
Jul 12, 2017 7:29 AM CST
I suppose it would be an issue if you have the chance of leaving them in the ground all winter. I just dig a hole and stuff them in and cover them up. No mounding. But of course I dig them each fall. Yechhh. They haven't even bloomed yet and I am already dreading the process. At least I have peonies blooming. No dahlias or lilies yet. Oh, and some Calif and opium poppies. No breadseeds yet.
Name: Frank Richards
Clinton, Michigan

Garden Ideas: Master Level Celebrating Gardening: 2015 Plant Identifier
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frankrichards16
Jul 12, 2017 4:57 PM CST
@Oberon46

I have no dahlia blooms yet, that would interfere with my wonderful yellow daylilies.

For me, August is the month for dahlias.

I do not mound, I do not trench, I do not eat green eggs and ham.
Name: Arlene
Southold, Long Island, NY (Zone 7a)
I was one of the first 300 contributors to the plant database! Tomato Heads Houseplants Garden Ideas: Level 1 Photo Contest Winner: 2014 Celebrating Gardening: 2015
Plant Identifier Million Pollinator Garden Challenge
pirl
Jul 12, 2017 6:54 PM CST
Ham yes, green eggs - no thanks. Cute, Frank.

I have a few blooms on Kasasagi and a big bud opening on Spartacus.

As I was putting dahlia leaves in the compost bin, where I had tossed many tubers cut from those I planted, I was stunned to see this:
Thumb of 2017-07-13/pirl/aabf3b
Thumb of 2017-07-13/pirl/57e271

Salt Spring Island, BC (Zone 8b)
Dahlias Region: Pacific Northwest Million Pollinator Garden Challenge
Image
islander
Jul 12, 2017 8:22 PM CST
bonus!
He who plants a garden plants happiness.
Name: Arlene
Southold, Long Island, NY (Zone 7a)
I was one of the first 300 contributors to the plant database! Tomato Heads Houseplants Garden Ideas: Level 1 Photo Contest Winner: 2014 Celebrating Gardening: 2015
Plant Identifier Million Pollinator Garden Challenge
pirl
Jul 12, 2017 8:34 PM CST
Big shock! I'll be very curious as to the identity of each one.
Name: Dan
NE Ohio (Zone 6a)
psudan
Jul 12, 2017 8:54 PM CST
I've always been amazed that a plant can grow when the tuber is exposed like those in Arlene's photo. It seems they'd dry out really fast. But I remember a bag of tubers without sprouts I had misplaced in my tool shed a couple years ago. They were in there from May until I found them in Oct. or Nov. in a zip-lock bag with no water and virtually no light. A few had shriveled a bit but had green sprouts.

One of the survivors ... barely!
Thumb of 2017-07-13/psudan/5623bc

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