Intensity of Color in V. sororia
Our yard is littered with blue and white violets similar to those pictured in another post on the forum entitled 'Who are we.' I assume they are V. sororia. They have been there for close to 100 years. I have noticed that the intensity of the blue color varies and there is a clump in a flower bed that is a particluarly purpley-blue . I am wondering if soil conditions affect the intensity of the color. It occured to me that acidity probably varies in different parts of the yard. I'd like to duplicate that intense coloration.