Viola plant like full sun but not too much heat. In the hot summer, they often get disappear. If you live in southern region of America plant your violas in partial shade.
Violas are not particular about soil pH but they grow better in slightly acidic soil. You can check your soil pH through test.
Viola plants needs regular watering to grow constantly. They can tolerate little bit drought but regular watering is always recommended.
Violas love to thrive in cold spring season. It can bloom during whole summer season and some weeks in falls.
Violas need fertile soil for good growth. When planting use compost soil. You can add organic matter in every season.
Click learn more to know How to grow and care for Viola flowers