Ice plant is a hardy ground cover that grows well in USDA Hardiness Zones 7 through 10. They grow well in full sun or partial shade and are great for rock gardens. Unlike some other succulents, ice plants grow best when watered on a regular basis but they can withstand short periods of drought. Ice plants grow low to the ground and sprout a carpet of blooms in a variety of colors for much of the summer. It is from these blooms that the seed pods emerge.
Allow your ice plants (Delosperma) to bloom and allow the blooms to remain on the plants until the blooms die at the end of summer.
Watch for the development of seed pods from the dying flowers. As the flowers dry and fall away completely, the seed pods will turn brown and dry. Tap the seed pods with your fingernail and listen for loose seeds rattling around inside the hollow, dry seed pod.
Pinch off the dry seed pods with your fingers and drop them into a large plastic baggie. Seal the baggie.
Lay the baggie on a hard flat surface and roll the back of a large spoon back and forth over the seed pods to break them open and release the tiny seeds inside.
Place a fine-mesh kitchen strainer over a small bowl and pour the crushed contents of your baggie into the strainer. Tap the sides of the strainer to encourage the tiny ice plant seeds to fall through the strainer into the bowl. Discard the chaff left in the strainer.
Pour the seeds from the collection bowl into a small baggie and seal it shut. Store the seeds in a cool, dark, dry location for up to one year before planting.