The raspberries taste soooo good! The raspberry spectrum doesn’t end with a mere two colors, of course. Other advantages follow here: cooler picking conditions, far less berry mold, and a fuller sweetness in the fruit itself in the drier fall window. The clusters of purple flowers with nice maple-shaped leaves make this an an attractive plant, found along roadsides and the edges of fertile … Cut out the dead canes. We find these things wild all over Vermont. Rubus odoratus - Purple-flowering Raspberry, Thimbleberry. The rose purple flowers appear in the late spring on the upper portion of the branches. It rarely kills raspberries, but can reduce yield severely by weakening the canes and killing buds. Pruning Everbearing Raspberries… Purple raspberries are the offspring of a red and a black raspberry … Pruning Black and Purple Raspberries. Positive: On Sep 3, 2004, MShelly from Jackson, NJ wrote: I have plants growing … I had to prune this plant constantly. The best time to prune reds is in fall after they are done producing. The large 3 to 5 lobed leaves are attractive lime green during the growing … The Purple Flowering Raspberry makes a very desirable shrub. In fall cut back all canes that have fruited. Raspberry spur blight: This is a fungal disease causing purple patches on canes. Flowers are fairly large, 1 to 2 inches across. Pruning Red Raspberries. This plant is very beautiful though and looks good in our flower garden. Remedy: Avoid … Cut the primocanes down to 12 inches.