Verdant and bold, perfect for planters on a shaded patio. Helleborus 'King Green' (Single Green Early). Incredibly easy to grow, hellebores are often thought of as harbingers of spring, sprouting as early as February in some climates. Until recently, hellebores were delicate diminutive plants. But these remarkable new varieties are ready to wow you with beautiful blooms up to 4" across and heights of up to two feet tall—twice the size of traditional hellebores. 3" pot.