Hardy in U.S. Department of Agriculture zones 7 through 11, agapanthus, or lily of the Nile, (Agapanthus orientalis) produces globe-shaped umbels of lavender or white trumpet-shaped flowers from June through August. Its light green, lance-shaped leaves, growing at the base of the plant, are 1- to 2-feet long. The flower stalks of agapanthus can reach 5-feet tall.
Complement your spiky agapanthus flowers with cosmos. Their daisy-like flowers and lacy foliage contrast nicely with the strappy leaves of agapanthus. Include hot-weather-loving zinnias in a variety of colours. Their substantial, dahlia-like flowers have visual impact in the garden bed. Border the edge of the flower bed with sweet alyssum or a short variety of French marigolds.
Plant late-spring-blooming and late-summer-blooming perennial flowers in the garden bed with agapanthus. Plant daisies, poppies and peonies for flowers in the very late spring. Plant asters, garden mums and sedum for flowers in late summer and fall.
Create a backdrop for the flowering plants by including a few foliage plants in the garden bed with agapanthus. Try ornamental grasses such as pampas grass or feather grass, depending on your local climate. Lower-growing foliage plants such as hostas, ferns or vinca will help the garden bed look polished all season long.
Care of Agapanthus Bulbs
You can grow agapanthus outside of their hardiness zones if you dig up the rhizomes and store them over winter in a frost-free area. Pack them in moist peat moss in a ventilated cardboard box at temperatures above 7.22 degrees C.
Plant agapanthus rhizomes outdoors in well-drained, moderately fertile soil. Space them 24-inches apart and about 1-inch deep. Water them the equivalent of 1½ inches of rainfall per week during the growing season for best results.
Potted agapanthus can be overwintered in a cool room. If the foliage withers, water less until active growth begins in late winter or early spring.
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