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mkpearse

Arkansas Amsonia

I ordered three Arkansas Amsonia plants as bare roots close to 4 years ago and planted them out on the south side of the house. They have lots of sun all day and started growing right away. But it's been 3 years now and they are still not flowering and they still only have 4 to 5 stalks that don't get more than foot and a half tall. I'm in zone 5c-6a. Am I supposed to feed them and what? Anyone have any tips on how to get them to flower and grow or are they just very slow?

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