Dahlias forum: Growing Tall/Cutting type Dahlias in Pots/Containers

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Name: Kayleigh
(Zone 5a)
Cat Lover Seed Starter Canning and food preservation Plays in the sandbox Lilies Hummingbirder
Irises Daylilies Cut Flowers Butterflies Region: Indiana Vegetable Grower
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HoosierHarvester
Dec 13, 2015 2:52 PM CST
I've grown several box store tall type dahlias (and a couple online purchased) and used them for cutting. I had a 30-foot row, but really didn't have a good winter storage area. I maintained them for 3 years through the winter outdoors in the row under a cover of about a foot of straw. Then, the one winter that I didn't get the row covered and we got an extra cold winter and all froze out. Thus, I haven't grown any dahlias for the last couple years.

I grow some of the short ones in containers, but never have grown the tall cutting type in containers. Anyone grow the tall ones in containers? What would be the suggested size container for a dahlia tuber?

I have found that these referenced type dahlias do best with plenty of water and some extra fertilizer. Out in the cutting garden, this happens very seldom. I felt I could care for them better closer to the house in large containers. If you've had such experience, I hope you will please.

I've also heard that the Karma line is good for cutting. Anyone have their favorites for cutting? I personally found I like either totally upfacing or slightly upfacing dahlia flowers for cutting. I've grown a couple varieties that the flowers seemed to be completely outfacing (like perpendicular to the ground), or even slightly downfacing, and I didn't like working with those two types in my bouquets. It's always nice to get varieties that have plenty of good stem length as well.

I would like to get a few again this spring. Thanks for any input.

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Name: Geof
NW Wisconsin (Zone 4b)
Region: Wisconsin Dahlias Garden Ideas: Level 1 Celebrating Gardening: 2015
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mandolls
Dec 16, 2015 6:59 PM CST
Apparently no one here grows dahlias in containers much. I have chatted with a few people who do on other sites, and they use 3-5 gallon sized pots . You can probably grow them in smaller pots, but once they get bigger you would have to water them twice a day.

Many of the places that primarily sell dahlias have groups they list that are especially good for cutting. Generally the smaller flowers (BB sized) produce more blooms and will last longer in vases. With ball dahlias you won't have the problem of down-facing blooms. What the people who show dahlias are looking for is slightly angled, mid way between up-facing and side-facing. So thats what the breeders aim for.
Name: Kayleigh
(Zone 5a)
Cat Lover Seed Starter Canning and food preservation Plays in the sandbox Lilies Hummingbirder
Irises Daylilies Cut Flowers Butterflies Region: Indiana Vegetable Grower
Image
HoosierHarvester
Dec 16, 2015 8:20 PM CST
Thanks for posting Geof @mandolls . That would be my perfect type angel as well; although I can work with up-facing too, though I've seldom seen up-facing flowers.

That's what I figured, that the pot size needed to be fairly large for nice production. And I'll keep in mind the BB sized ones when I start looking for a few to test this coming year.

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