Plant the stevia herb when temperatures are still cool during the spring; ideally when the soil temperature is between 50 and 60 degrees F, 2 to 3 inches deep.
Position the plants at least 18 inches apart to give the plants enough room to grow. Mix the soil with 1 part compost for every 3 parts of ground soil to provide essential nutrients to help the plants thrive.
Keep the soil moist, but not saturated, as over-watering will kill Malaysian stevia.
Mulch the soil with wood chips during hot summer months to prevent the soil from drying and causing root atrophy. Cover the top soil with a single layer of 3 to 4 inches.
Weed stevia crops by hand, pulling weeds up from the roots.
Strip the leaves of the Malaysian stevia plant as part of a fall harvest. Prune the bush so that only 4 inches remain of each stem near the base of the plant.