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I have been growing one type of Papaver somniferum that is a semi double red for years. This past year I sowed a different type which turned out to be a lovely pink. There was no danger of cross pollination of these two different poppies because they flowered at different times but this coming year there will be since both reseeded in the same location. Does one have to isolate to maintain purity of a certain cultivar? Since I really like the pink but I'm so so on the semi double red should I remove all the reds as they try to flower?
Thank you for your help
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