How to Grow Agapanthus Indoors
- 1). Plant agapanthus in a 20- to 24-inch diameter pot. Fill the pot with potting soil to within 2 inches of the rim. Plant the agapanthus so the top of the rhizome sets just beneath the surface of the potting soil.
- 2). Set the pot indoors in a brightly lit window that receives direct sunlight for most of the day. For the outdoors, place the pot in a full sun location, though light afternoon shading is suitable for outdoor plants.
- 3). Check the soil moisture in the pot daily during the spring and summer months. Water the pot when the top half-inch of soil feels dry. Place indoor pots on a drip tray so any water that drains from the pot during irrigation is confined. Empty the drip tray after watering.
- 4). Fertilize agapanthus in spring as new growth begins to emerge. Apply a soluble balanced fertilizer to the soil weekly, following the rate and application instructions on the fertilizer package.
- 5). Bring outdoor agapanthus indoors before frost. Place the pot in a warm, sunny location.
- 6). Reduce watering as the days shorten in late fall and as growth slows on the agapanthus. Water the plant sparingly once or twice a week so the soil doesn't dry completely.
