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Growing sweet potaoes in the greenhouse.

 
dan Faling
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I was wondering if anyone has tried growing sweet potates in their greenhouse. I've tried growing them outside, michigan zone 5b, but haven't had much luck, so this year I decided to start them now in the greenhouse and leave them in there all year. Can't seem to find any info about this. I would appreciate any feedback or info on this idea. I'm also growing an early batch of regular potatoes in there, never tried that before either. thanks.
 
Joseph Lofthouse
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Location: Cache Valley, zone 4b, Irrigated, 9" rain in badlands.
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bee chicken food preservation fungi greening the desert
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I'm also intending to grow some sweet potatoes in the greenhouse this summer. I currently have two varieties growing in pots. They can stay in the pots until about June when I don't need the space any longer for tomatoes, then they can go into the ground of the greenhouse. I've been pulling slips from tubers that are rooting in potting soil.
 
dan Faling
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Awesome! Is this the first time you've done this? And did you order sweet potatoes? I got mine from the grocery store, so not 100% sure they are not yams, but last time I grew them they did turn out to be true sweet potatoes. I have 2 foot high by 3 foot wide by 25 feet raised beds in the green house, but I just finished filling them with soil so I need to give it a little time to heat up then they are going directly into it. How do you make your slips? I have always just stuck the whole sweet potato in the ground.
 
dan Faling
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woops just realized you already told me how you made your slips, just not familiar with the term I guess I should say.
 
Joseph Lofthouse
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Posts: 1993
Location: Cache Valley, zone 4b, Irrigated, 9" rain in badlands.
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bee chicken food preservation fungi greening the desert
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This is sorta my first time... I started sweet potatoes in the greenhouse last spring. They were doing great, then I had to leave them behind...

I grew one set of slips from a sweet potato that I grew outside in my garden last year, and the year before. I also obtained three different varieties of sweet potatoes from the grocery store. Washed them in soapy water. Set them in a dish of water. Two of the varieties promptly rotted. I dried off the third variety, and stuck it in a bag in the fridge for a few weeks (due to speculation on another site that tubers sprout easier after being cooled). Then I smeared rooting hormone on it and stuck it in some coconut coir, in a chamber at about 90 F. It sprouted like crazy within a few days. So I'm breaking off shoots and transferring them into pots. It's still 10 weeks before my average last frost day, but whatever...

I also have pollinated sweet potato seeds to plant. I'm intending to grow them in the greenhouse as well. Presuming that some of them sprout...

I am primarily growing them in the greenhouse because growing locally-adapted sweet potatoes is another of my plant breeding projects. Sweet potatoes tend to flower during the short days of fall, when it is getting frosty at my place, so I'm trying to extend the season long enough in the fall to allow for seeds to mature. Perhaps some of the seed grow plants will flower earlier, or tuberize earlier. I'm collaborating with a community of plant breeders on this project. The seeds I have to work with this year were gifted to me by someone in a warmer climate. The project would proceed a lot faster if I were able to generate at least some of my own seed.

If anyone in the usa is growing pollinated sweet potato seeds, and feels like swapping, I'll swap you 10 packets of any of my seeds for one packet of sweet potato seeds...
 
I agree. Here's the link: https://richsoil.com/wood-heat.jsp
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