Helianthus (sunflower) — the basic olive plant. Blossoms from July till September. In the melliferous relation is appreciated for nectar, pollen allocates a little. Helianthus (sunflower) is an annual plant with thick stalks to 4—5 m of height. The head is usually 15-20 sm., but sometimes reaches to 50 sm. The Helianthus (sunflower) native land […]