Plantation Renewal At every five or six consecutive cuts, the cultivation is renewed. Therefore, the annual renewal rate lies between 15% and 20% over total cultivated area. Seedlings used derive from nurseries, where vigorous and proved quality plants are produced. The vegetal reproduction by means of meristem cultivation can be used in such phase, mainly for the multiplication of new varieties. Successive rougings remove sick plants from nursery and ensure their quality.