I believe these flowers were waiting for rain and cool to start blooming. Violets must be very “tough cookies” to put out their flowers in the cool of winter. Much as I’ve tried to vase these blossoms, they just do not seem to like to live indoors. It must be too warm for them.
Even if it snows, these tiny flowers will bounce back as soon as the sun melts an opening in the ground. We should be enjoying violets until the heat of summer sends them dormant until the next rainy season.
This fall, I have been moving around many plants, some of them surrounded by this ground cover. The little violet rootlets just get pushed back underground, and as long as it keeps on raining, they will reestablish in a new home.
susansflowers 
November 10, 2014 at 6:05 pm
In our yard they were pink violets that became terribly invasive. I have planted some of the fragrant blue ones in a spot that will confine them. The pink ones get pulled up when ever I find them.
November 11, 2014 at 4:24 am
I do have pink violets that come up in small clumps. A friend has warned me that they can become invasive. So far, they have shown up in places that could use a pretty fill. But those might be ‘famous last words’ 🙂