With the popularity of stevia as a natural sweetener, many gardeners are experimenting with growing stevia in a home herb garden. When you have a healthy and thriving stevia plant, consider propagating it to create more plants in your garden. Propagate stevia plants by taking stem cuttings and rooting them under the proper conditions. With careful attention to detail, you can successfully root the new stevia plants and increase your stevia harvest.
Prepare the planting container by filling the individual compartments to the top with vermiculite.
Clip stems from the parent stevia plant with the pruning shears. Cut the stems off at lengths between 2 and 4 inches, ensuring that each stem has at least two leaf nodes (the point where a leaf attaches to a stem). Cut the stems between leaf nodes and not at a leaf node.
Remove any leaves from the bottoms of the stems with the pruning shears so the stems will not be beneath the vermiculite. Remove any large leaves from the tops of the stems, but you can keep small leaves on the tops of the stems.
Insert one stem into each planting compartment, inserting them enough to bury at least one leaf node beneath the vermiculite with at least one additional leaf node above the vermiculite.
Place the seed starting planting container beneath a grow light in a location with temperatures between 60 and 70 degrees Fahrenheit. Keep the grow light approximately 7 inches above the stevia stems, and keep the grow light on between 14 and 16 hours each day.
Watch for signs of rooting within one week. When you see new leaves growing from the stems, you know that new roots are forming beneath the vermiculite.
Fill the planting containers with potting soil. Move the rooted stevia cuttings to the prepared planting containers (one cutting in each container) approximately one month after you see indications of root development. Keep the cuttings moist in the planting container by watering the cuttings lightly whenever the soil begins to dry.
Transfer the new stevia plants to an outside growing location or to permanent growing containers after another month passes.