Portulaca grows as a hardy annual in even the poorest soil conditions. Commonly referred to as moss rose, portulaca grows succulent stems and leaves which are edible before flowering. Once flowering begins, portulaca delivers a vibrant array of color and interest to the garden. Portulaca grows from seed sown directly in the flower bed after the last frost has occurred.
Prepare a flower bed in a location that receives at least eight hours of sun each day. To improve drainage, add coarse sand so the bed is 2 parts soil to 1 part sand. Till or spade the site until the soil and sand are mixed well.
Remove any debris and large rocks from the garden bed. Break up large clumps of dirt. Rake the surface of the soil smooth for planting.
Plant the portulaca seed according to the package directions after the danger of frost has passed. Generally, portulaca seed is scattered across the soil surface and sparingly covered with soil.
Water the planted portulaca seed in the evening or early morning until the seed starts to sprout. Thin the plants so there is 3 inches between plants.
Continue watering the plants only when the soil becomes dry. Over-watering drowns the portulaca and the plant will die.