The semi-tropical flowering clivia plant, a relation of the amaryllis and lily, grows primarily from an underground bulb. The bulbs naturalize readily, but clivia can also be cultivated by seeds borne on the plants in the fall that are encased in a red fruit. Young clivia plants can be divided off of a mature parent bulb and planted as seedlings when each bulblet has developed several leaves. Young clivia seedlings require bright filtered sunlight, ample moisture, regular feeding and mild ambient temperatures to thrive.
Plant young seedlings in nutrient-rich potting mix that has been amended with compost. Spread the tender roots in the planting mix carefully. Fill in soil around the roots up to just below the crown of the plant where the transition from pale to deep green tissue occurs.
Provide temperate growing conditions for your clivia seedlings where daily outdoor or indoor temperatures surrounding the seedling plant remain between 60 and 75 degrees F.
Water your clivia seedlings deeply at planting to drench the pot. Water well once a week thereafter to keep soil lightly moist at all times. Allow the top 1/4-inch of soil to feel dry to the touch between waterings, but do not allow the soil to dry out entirely.
Place nursery trays or pots of seedlings where they will receive very bright indirect sunlight or filtered direct sunlight such as through a mesh canopy or lath house for a minimum of six to eight hours each day. Seedlings grown indoors do best when provided a bright southern or western light exposure.
Feed your clivia seedlings once per month with a water-soluble, general-purpose plant food. Mix the plant food with water using only 50 percent of the recommended dose to a full volume of water. Pour the fertilizer solution over the planting soil and roots but not over top of the plant to prevent spotting and pitting of the tender leaves.