Q. There is a small blue flower that I find blooming around my garden and in my lawn. There are three petals. While it is a beautiful little blue flower, I am wondering if it may be a weed.
A. It seems that you have Asiatic dayflower growing in your garden. It is a member of the Commelinaceae or spiderwort family, and appears from June to October. While most "blue flowers" are closer to violet or purple, the Asiatic dayflower has a "true blue" color that is found in few other plants. Bees primarily pollinate the flowers. As the name suggests, Asiatic dayflower was introduced to the U.S. from Asia.
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It can be erect or sprawl across the ground like a vine. Each flower blooms during the morning for a single day. There are few herbicides that are effective on Asiatic dayflower.
However, its roots are very shallow, making it easy to pull out from the ground.
• Provided by Mary Boldan and Mary Moisand, University of Illinois Extension Master Gardeners. Master Gardener Answer Desk, located at Friendship Park Conservatory, 395 Algonquin, Des Plaines, is open 9 a.m. to noon on Wednesdays. Call (847) 298-3502 or email Cookcountymg.firstname.lastname@example.org.