Pennisetum Plants - Fireworks Simply stunning as it ripples in the breeze! The Pennisetum Plants - Fireworks commonly known as Fountain Grass is refreshingly different for summer flower bed and flower border displays. The grassy foliage is full of colours from red and cream to purple! This stunning display is further enhanced by purple feathered flowerheads during the summer which makes fantastic flower displays planted in patio pots or containers. The Pennisetum Plants - Fireworks flowers July-October. Height 80-90cm (32-36"); spread 50-60cm (20-24").