American Wisteria Seeds - Wisteria Vine with Scented Purple Flowers High quality american wisteria seeds from Wisonsin, USA. Guarantee to germinate and grow to make healthy plants. Strong vines with green leaves and sweet scented purple flowers. Tough plants which survive harsh weathers and diseases. Fast growing, only 1-2 years to mature for bloomings. The plants grow faster in warmer climate. For cold climate areas, it will take 2-3 years to mature.