As these twiggy portions develop then the flower production will increase, especially when spurs develop, which consist of a short stem with 4-6 buds on it. Also remove any dead wood. During this cleanup operation it is good to keep an eye out for borer holes, since borers love wisteria. A shot of spraying oil directly into as many holes as you find will give control. A sinensis selection with dark reddish violet florets on racemes up to 20 cm long, most perfumed variety available.
New growth is tinged bronze.
Similar to Amethyst but flowers soft violet blue, and perfume not as strong. There is a widely grown form of W. sinensis called 'Consequa' which is the original form of sinensis introduced to England. Blue Saphire is considered superior. This variety flowers late in warm areas but is reputed to flower earlier in cool climates. The racemes are rather short compared to other wisterias, being only 15-20cm long, but the florets are up to 3cm across the standard.