How to Propagate Agapanthus

Leave the flower stalks on the plant until the flowers fade and the seed pods begin to turn brown. Collect the seed pods as soon as they split open. Store the agapanthus seeds in a cool, dry place until they are planted.

Start agapanthus seeds in mid-winter. Select 2-inch planting pots for starting the seeds. Most planting pots have drainage holes in the bottom, but check to make sure, as this is an important feature for successful germination.

Fill each pot with soil-less seed-starting mix or seed-starting compost. Both are available at home and garden centers.

Place one agapanthus seed on the surface of the seed-starting medium in each pot. Cover the seeds with 1/4 inch of the potting medium.

Place the pots in a water tight pan, sink or container. Fill the container around the seed pots until it comes half way up the side. Leave it in the water to absorb moisture until the top of the potting medium becomes damp. Remove the seed pots from the water.

Place the agapanthus seeds in bright filtered light where it is 68 to 75 degrees Fahrenheit. Place the pots in the water bath when the top of the planting medium feels dry under your fingers. The agapanthus seeds will germinate in three to four weeks.

Transplant the agapanthus seedlings outdoors in the spring when night temperatures are consistently above 40 degrees Fahrenheit.