Viola Plants - Yesterday, Today & Tomorrow Fill your garden with stunning colour changing violas! Viola Plants - Yesterday, Today & Tomorrow is a totally unique variety that produces a lot of flowers over a long length of time. The flowers change colour day by day hence the name. Yesterday they were almost white, today they are light blue and tomorrow they will be deep blue, and as they open on different days, it always appears as though there are multiple varieties planted together, giving a lovely effect in flower beds, flower border and patio containers for many months over winter with a continually changing and eye-catching display with all the different shades complementing each other wonderfully. Flowers March-August. Height 11-20cm (4-8"); spread 20-30cm (8-12").