At rosybee this plant has already been flowering, if only a few sprigs, since the first week in March and would be providing nectar if it was mild enough for the bee to be flying. Bowles Mauve is a freak of plant breeding that, because it had become sterile through breeding, and will keep trying to produce flowers from March to September. At this time of year we find that the bees prefer the willows and blackthorn so its efforts are in vain but later on it will be attract a wide range of bees.
The plants are so hard working that they may get a bit tall and 'leggy' so need to be pruned back each autumn; then you will get 3 to 4 years of value from them.
This is one of our top recommended plants for bees and we always have it in stock in spring.