Agapanthus, a showy plant with sprays of blue flowers, is a tender perennial popularly used in garden borders.
While these plants are typically cultivated by dividing the rhizomes, they also can be propagated easily by seed which naturally increases the quantity that you are able to have.
Agapanthus are hardy plants, and are easily grown.
They are tolerant of drought and poor soil, once established but both flower and foliage production improves with moisture and feeding. They are always best in a position of full sun in any well-drained soil. Routine removal of spent flowers will encourage further flowering.
If growing in pots, do not use overly large containers as they do better when the roots are somewhat congested.