I googled this weed just to see what it looked like and I now know the name of one of the weeds growing in my lawn. Not that I mind it in my lawn and when I've had it pop up in a flower bed it's alwys been very easy to pull.

Here's a few pieces of info that I found on daves garden.
"Asiatic Dayflower is known to be Round-Up (glycophosphate) resistant. Herbicides containing flumioxazin are recommended to kill dayflower infestations. Flumioxazin is marketed by Valent Professional Products as Sureguard and Broadstar"

"it is extremely invasive; but at least it is edible. The young leaves and stems can be added to salads or boiled for 10 minutes and served with butter."

"I find the blue pigment to be very stable and long-lasting. I collected many petals into a small container of rubbing alcohol and have used it like water-color. The pigment turns green when an alkali (like baking soda) is added."

yeah really the most pernicious weed in the florida garden... it's impossible to eradicate it. i've tried everything. the only way to manage it is to yank it whenever you see it, and then CAREFULLY dispose of it... it's a remarkable little plant--even a tiny piece of it will root. it LOVES mulch...

I googled it too and now I know what to call it when I curse this plant in my garden. It grows everywhere and can cover a neglected area in a very short time.

Good to know about the pigment thing though. I've started dyeing some of my own fabric for quilting so I may give this a try!

Kate

Kate, in case you didn't know spiderwort flowers are also good for dyeing fabric and it's a really easy plant to find.