Daylilies forum→kwanso daylily

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Sep 8, 2020 4:06 PM CST
So every 2 - 3 years I have to dig out Kwansa daylily which is usually 4 feet high by then. Yes it is lovely, but much too aggressive for my small space. Today as I am digging out the current giant...I find what almost feels like a tap root at the bottom. ( I hope I have all the side runners located and removed.) So the silly question is....does Kwansa have something akin to a tap root and that is what makes it so hard to control??? Should I maybe slowly pour some boiling water where that root is??
Name: Rick R.
Minneapolis, MN, USA zone 4
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Sep 8, 2020 4:53 PM CST
No taproot, but the root mass (including all the fat tubers) can be massive. Sometimes the thick roots are so numerous that they seem to almost coalesce and become one solid mass, that might seem like a taproot. With established plants, you will never dig all the roots out the first time. You just need to be persistent. Kwansa daylilies are really just a kind of the old ditch lily, and they will take a lot of abuse. If you have a place to put them with poor soil and/or more shade, they will be much easier to control.
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Name: Sue
Ontario, Canada (Zone 4a)
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Sep 9, 2020 5:11 AM CST
Daylilies don't have taproots and don't regenerate from roots left behind (unless there's a big enough piece of crown attached) but those like 'Kwanso' spread by rhizomes and small parts of a rhizome left behind during digging can regrow. Since you said you had tried to get out the "side runners" I wonder if what you felt was an older, deeper, rhizome. They do look and feel quite woody.
[Last edited by sooby - Sep 9, 2020 5:12 AM (+)]
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Name: Vickie
Elberfeld, Indiana, USA (Zone 6b)
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Sep 10, 2020 2:06 PM CST
I am not sure boiling water would help with killing the species daylilies like 'Kwanso'. I had to just keep watching the area where mine was growing to make sure to dig out any pieces that started growing. I was able to eradicate it after a few years, but in the meantime, I couldn't plant anything else in that spot for fear it would take off again.

May all your weeds be wildflowers. ~Author Unknown

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