Impatiens Beacon grows into a tidy, mounded plant 25 – 30cm high and wide, with flowers carried above the leaves. It’s one of summer’s best-loved flowers for semi-shade. They are fantastic planted en masse. They’re designed to make a show, so the more plants the better. They do best in semi-shade such as morning sun with afternoon shade or dappled sun. The shadier the bed, the less they flower and the more they will stretch towards the light.