verb (used without object), self-sowed, self-sown or self-sowed, self-sow·ing. Botany.
Examples from the Web for self-sow
They self-sow, and the plants of the present year bloom the next.
And as few of them self-sow, it is necessary to plant and carry over every season.Gardening for Little Girls|Olive Hyde Foster
Many with us self-sow and live through the winter without any protection.
The physalis will self-sow and may become a weed, but it is easily controlled.The Vegetable Garden|Anonymous