Create a cottage feel in your garden with these beautiful blooms. Petunia Night Sky might be the most distinctive bloom you ve ever seen on this planet. With it s ground breaking new colour pattern of deep purple with white varying flecks creating the effect of a starry night sky. Petunias are a fast and fool proof way to inject colour into your garden for summer. Apart from their brilliant colour, petunias are amazing because they are tolerant of both heat and humidity. As the plants grow, tip prune them to encourage branching growth.