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We also use seeds from time to time but that's highlyunlikely to be successful, unfortunately. So the best way is this greenhouse.

Most of the hybrid tubers are so expensive that you really need to dig and protect them over the winter! Our growing season would be much too short to even attempt seeds!

Oh, sorry to hear that. Well, the weather is not so cold here, the gardening season is from March to October, mostly. How about over there?