Answer? Mango kernels can be planted, but they need to be treated before planting because the shell is hard. Before planting, you should wash away any remaining pulp from the mango kernel and then pry the shell open with a knife. It needs to be pried from the side so as not to hurt the seeds inside. After that, the seeds inside are removed and buried in loose, fertile soil, watered thoroughly and kept moist. They will soon take root and sprout.