Symphyotrichum (Aster) novi-belgii 'Plenty'
A stunning variety ideal for the middle of the border, as it's neither very tall, nor very short. Large double flowers of a gorgeous powder-blue colour, with yellow centres. This one really stands out and is a 'good doer' for me, needing very little care each year other than a bit of compost. Flowering size 70-90cm high x 40-50cm wide. 9cm pot.