Asparagus fern, or Asparagus densiflorus, is actually a member of the lily family, and not a fern. These plants can be grown in containers or planted in the soil in tropical regions. The plant enjoys full sun, yet can tolerate cool weather. Freezing temperatures may kill the tuberous roots if left in the cold for prolonged periods. The asparagus fern is propagated by dividing the tuberous roots or planting the mature red berries. Sprig cuttings are not successful for propagation, according to the University of Florida, as the stems may be too woody to make roots from sprigs.
Collect the mature red berries from the plant. Remove the exterior pulp from the seedpod by rubbing the berry between your fingers under running water. In some cases, the pulp may contain chemicals that prolong the germination period.
Spread the washed and rinsed seeds on paper. Allow the seeds to thoroughly dry.
Mix a potting soil that contains equal amounts of peat moss and sand. Fill the 2-inch pot with the soil mixture.
Insert a single seed into the center of the small pot. Plant the seed no deeper than one time to two times its own diameter. Add water to the soil and keep the medium moist.
Place the pot in an area were temperatures will remain between 75 degrees F and 80 degrees F.