John Tradescant aquired seeds of this genus for English gardens around 1630. They soon became very popular, and are now grown almost everywhere. They spread easily, and have done so around the world, even in Polynesia. Plants in American gardens may have initially been reimported from England. In gardens, they can be seen in varieties of blue, purple, pink, or white. One attractive version is white with blue filaments. Most often these flowers are deep blue in nature. The blue one here is slightly lighter than normal.