Select the ripe pitaya, peel the pulp out and soak it in water. After soaking, crush the pulp by hand and separate the seeds and pulp as much as possible. After that, prepare a filter or stockings, put the thinly broken pulp into it and soak it for a day, then knead it, squeeze out all the pulp and leave only the seeds to dry.
When planting, choose the basin bottom without hole, and put in the nutritious soil. Before planting, spray water on the soil surface to keep it moist.
After the seeds are completely dried, they can be planted. They can be sown directly on the surface of the soil.
After the seeds are sown, spray water several times more, and then wrap them with fresh-keeping thin bags until they are opened after sprouting. During this period, spray water every day, and cover the plastic film timely after spraying water. It lasts for about a week to grow leaves.