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Agapanthus Care

These dramatic and elegant showstoppers are native to South Africa but now grow wild in Australia, Great Britain, Mexico, Ethiopia, and Jamaica. In the United States, they are commonly seen in Northern California.  

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Globes of tubular flowers in shades of blue, purple or white ascend from bold strappy foliage that is similar to a daylily. Sun-loving Agapanthus are also called lilies, as in their common names lily of the Nile and African lily but are not related to true lilies (Lilium species). Instead, they are in the subfamily Agapanthoideae, can be evergreen or deciduous, and are winter hardy in USDA zones 7 through 11, where they look wonderful massed as a border. In colder zones, they are enjoyed as elegant summer annuals. They range from one foot to five feet tall. They do well as cut flowers and attract pollinators including hummingbirds. It is used medicinally, however the sap can be irritating to the skin or painful if ingested.

Planting Agapanthus

Choose a spot in full sun with well-drained soil. Plant with root crown facing up at least 1” deep or as needed to just cover the roots. In the colder edges of Agapanthus’ hardiness zones, in zones 7 and 8, mulch thickly in winter to protect the roots. Give 8 – 12” of space between plants. Agapanthus bloom the most when pot-bound, so in pots, err on the smaller side for containers. A 12” pot should do for one mature plant.

Watering Agapanthus

Agapanthus will thrive with consistent watering, about 1” a week during spring and summer. The soil should be kept slightly moist but never waterlogged. In fall and winter, allow the soil to dry out. 

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Fertilizing Agapanthus

In-ground plants will enjoy one light slow-release fertilizer application in spring, or just a top-dressing of compost. Pots should also be fertilized conservatively; overfertilization can cause lanky growth.

Pruning Agapanthus

Maintenance pruning is not necessary. Flowers can be cut to make arrangements. After blooming, allow the foliage to die back naturally rather than cutting it back, then remove once it has yellowed. They can be divided every 4-5 years with a sharp spade or knife.

Caring For Agapanthus in Pots

Choose a 12” pot for a single mature plant, use a well-draining potting mix. Fertilize lightly. They prefer being pot-bound, so wait until absolutely necessary to re-pot. If not hardy in your area, take inside for the winter, treating evergreen types as a houseplant and moving deciduous ones into a cool (but above freezing), dark room to keep dry and dormant. Acclimate to the outdoors after final spring frost.

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Winter Care for Agapanthus

If Agapanthus are hardy in your area, consider a thick mulch for the winter to protect the roots, particularly if you are in the colder parts of their hardiness range. If they are not hardy in your area, take them inside for the winter, treating evergreen types as a houseplant and moving deciduous ones into a cool (but above freezing), dark room and keep dry and dormant. Acclimate to the outdoors in spring after final spring frost.



 

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Agapanthus Care