The annual lavatera mont blanc is a summer and honey-producing annual plant with white flowers that last a long time in a vase. In beds, due to its size, plan to plant them towards the back. Height 0.5-1 m. Successfully sowing annual lavatera mont blanc Sow directly in place, in rows or broadcast from March to May. Thin out, leaving 25 to 30 cm between plants. Water thoroughly during droughts. Flowering Flowering from June to October.