Yes, it can grow to a big mass and be divided. You can also cut it back to the ground after it begins to fall over as it frequently does post flowering and it will green up again prettily.
Funny, I always confused this pretty wildflower for the dreaded Knotweed! Don't ask me why; I'm just glad to be set straight.
Flower
aesg (from livejournal.com)2011-05-24 11:54 am (UTC)(link)
Spiderwort. Stuff is unbelievably prolific, bordering on invasive. After the flowers are gone, a plethora of seedpods appears; and the root systems is insane - making it nearly impossible to pull it out of the ground without the stalks breaking in all sorts of places and dumping seeds everywhere. Then when all the flowering is done, the leaves and center turn blackish and weedy looking. Sorry, I love nature in the city too, just not this particular bit - I have been fighting this plant for the better part of 8 years in my garden. And people buy it at the nursery!! [To those would-be purchasers, please just come over and I'll dig you some]
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I have some my dad gave me from Michigan. It grows as a wildflower up there.}:)
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Mysterious Mystery Flower
(Anonymous) 2011-05-14 06:07 pm (UTC)(link)Flower
Re: Flower