At planting time, planting materials should be graded into several groups according to sizes, and each group should be planted separately to ensure uniform stand and maturity in the field
Panthawi yobzala, mbewu isankhidwe kukhala mmagulu ambiri potengera kukula, ndipo gulu lirilonse libzalidwe palokha pofuna kukhala ndi zigawo zokula mofanana komanso zokhwima mofanana mmundamo