The "Mother of Thousands" Kalanchoe delagoensis (Sym: Kalanchoe tubiflora) is a peculiar succulent species that reproduces via "plantlets" that grow on the ends of each leaf & drop off.... they fall into the dirt and grow from there. They grow everywhere, don't need dirt, they grow, among the spines of cacti, in orchid bark, between the leaves of bromeliads, in leaf litter on a cement patio, as well as in every pot within 15 m of the mother plant. Good thing they don't have nasty roots- they pull up out of the ground easily. The plant's capability for vegetative reproduction, its resistance to drought, and its popularity as a garden plant, have allowed the plant to become an invasive weed in places such as eastern Australia and many Pacific islands. In optimal conditions it grows as an annual/biannual and typically grows to about 1 m before blooming in the winter. Plants die back after blooming and new shoots can arise from the roots.