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Dividing Dahlias (How We Store Them, Anatomy of a Tuber & Tuber Division!

Dividing Dahlias (How We Store Them, Anatomy of a Tuber & Tuber Division!

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Dividing Dahlias (How We Store Them, Anatomy of a Tuber & Tuber Division! Pat: I love dahlias, but hate the digging and storage process. I have 15 crates and boxes of full of dahlias to divide plus (embarrassed to admit) new varieties coming to try. I'm in zone 6b and will be experimenting with leaving at least some of them in the ground. I saw a video where they mulched very heavily with shredded leaves and then tarped the row. it's the wet soil plus the cold that evidently rots them. We have a cyclone rake that we attach to our lawn tractor that we've had for 10 years and it was a game changer for leaf collection. It shreds the leaves and we pile up the shredded leaves with grass clippings and make the most beautiful leaf mold to amend our clay soil-no dig style. We can divert some of those shredded leaves to this endeavor and give it a try. Nothing to loose except a few tubers. If it works, what a find.
Date: 2022-07-16

Comments and reviews: 9


In the summer of 2020, (as a new gardener) I planted 3 dahlias, last summer I planted 16 and this year I have another 10 on the way from the same dahlia grower. To say that I am a bit obsessed with dahlias would be an understatement! I was going to buy a few for my aunt, who loves seeing pictures of all of my beautiful plants, but lives too far away to share bouquets with, however it was suggested that I send her some of mine after I divide them. I was wondering if I could put them in a Ziploc vegetable bag (they have air holes in them) with a bit of peat moss and ship them (express) to her? I would love to know what you think might be the proper way to safely ship them? Thank you so much for sharing your knowledge with us.
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Seeing all these pretties make me so excited for Spring!
I live in Western Kentucky, zone 6b, and in my years of watching my mom grow dahlias, she would always try to winter hers over in the ground and they just never made it back up the next year. That poor lady put all the leaves and mulch she could but still had no luck. She was intimidated by the storing process so she always ended up planting new ones the next season. I just dont want you to lose some of your favorites if you decide to leave them in the ground. Best of luck this year!

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Maybe some of your friends who want tubers would come help dig tubers and later have a tuber dividing party together. If not enough want to plant them, friends or volunteers could participate in digging and dividing, then sold for donation to support the crisis nursery? I also have a question: How do you mark the plant in the field so you keep track of the dahlia tuber variety. I assume you have markers for groups of plants, but not sure on next step.
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Question for ya! Do you think I could grow one dahlia tuber per gallon or two gallon container all season long? Last year I had such horrible slug pressure that all the plants I grew in the ground were super behind and never fully reached their full glory. So I want to start them in pots to prevent this we are also planning on selling our home late this summer and call me selfish, but I could never leave all the tubers I bought behind!
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I'm in a zone 8b and luckily enough to leave mine in here in the UK, with a good mulch 90% of them always come back, after 3-4 seasons they do get to the point where you have to dig them up and divide them however as they get massive, we're talking clumps 10 -12inchs across and massive tubers, at that point they start to get congested and flower poorly but as soon as they are divided they go crazy again the next year.
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Thank you for this information so helpful! My daughter gave me an advent calendar this past Christmas and each day had a dahlia in it so I need as much information as possible because its all new to me! I do have one question you mentioned when you split the tubers they had to heal/dry before going back into storage. Is that also necessary if you were going to plant it right after splitting it? Thanks again for all you do!
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Hi Laura, So a couple of weeks ago my husband and I were amending the soil and turning it over, when I hear Look at those potatoes come from my husband. At first I was like potatoes, then i realized he dug up my tubers. So at the time I didn't go into the house turn on GA and find out what to do, I just put them back. My question is should I dig them back up and make sure I placed them correctly? or just leave them alone?
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I used to store mine in a big barrel with peat or wood chips but 4 years ago I lost over half of them, then I discovered the plastic wrap process (I use shrink wrap instead, I love doing it this way, now I only get a couple tubers that will rot over the winter, the rest stay perfect. It takes me a whole day to split and wrap, but well worth it for me and now I'm ready for spring, also they don't take up as much space.
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2 years ago I successfully saved my dahlia's using the lazy gardener method. I planted them in a light weight pot in spring and in the Fall brought the entire pot in the garage for the winter. I was so pleased and happy to see them bloom a second season in the same pot and the same soil. I repeated this method for the second winter and hope to have the same results. it was so worth it.
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