Stevia Rebaudiana seeds in an airtight bag. Perennial herbaceous-shrub plant. Perennial herbaceous-shrub plant. It has ovate, opposite leaves. Native to the tropical regions of the highlands of Brazil and Paraguay, it has been used by the inhabitants for centuries as a sugar substitute. The sweetening principles are in all parts of the plant but are more available and concentrated in the leaves, which when dried (dehydrated), have a sweetening power from 150 to 250 times more than common sugar. Plant height: 60 cm Sowing: from April to June Transplant: from May to July Harvest: from July to September