Agapanthus 'Adelaide' is easy to grow and it does well even in the poorest of soils, but it must receive some water in spring-summer. To perform at its best, give it rich, well-drained soil with ample compost and plenty of water in spring and summer. As with most plants they benefit most from regular (e.g. weekly) deep drenching as opposed to frequent superficial waterings. Agapanthus ' Adelaide ' does equally well in full sun or partial shade. All the evergreen agapanthus are best lifted and divided every four or five years or for optimal flowering. Agapanthus ' Adelaide ' will tolerate light frost, but is hardy only in the milder parts of the Northern Hemisphere, like the southwest of England and in the Mediterranean. In areas with extreme winter temperatures it is best grown in the cool greenhouse, or in containers that can be taken into a glasshouse during winter.

This agapanthus is magnificent when mass planted, it is an ideal edging plant especially along a pathway or in clumps in the front of the border, or in rockeries, and an excellent groundcover in full sun or in partial shade. It can be used to stabilise a bank and prevent erosion. Agapanthus 'Adelaide' is also a rewarding potplant and a good cutflower.

To propagate this cultivar, and keep it pure, it can only be multiplied by division. Clumps are best lifted and divided just after the end of their flowering period in early March (late summer - autumn). Reduce the length of the foliage by one half and reduce the roots by two-thirds. Replant immediately and water thoroughly. Unlike the deciduous species, which should be left alone for up to 6 years and often don't flower the first year after being divided, the evergreens are best lifted every four years and usually flower best in their first season after dividing.

Although Agapanthus 'Adelaide' sets seed freely and the seed germinates readily the seedlings will not resemble the parent exactly. Also, agapanthus hybridise with each other quite freely so in addition to the natural variation within the species, you will also get unknown hybrids with whatever other agapanthus are flowering in the vicinity. Seed can be sown fresh, in late summer - autumn, but in cold climates it can be kept refrigerated (not frozen) and sown in spring. It must be kept in the refrigerator or it will perish. Seed should be sown in deep (10 cm) trays, in a mixture of equal parts river sand and fine compost, and kept semi-shaded and moist. Seed germinates readily within six to eight weeks. The seed should be sown thinly as the seedlings will stay in the tray for their first year. Seedlings should be potted up into individual containers during their second year and can be planted into the garden or permanent pots in their third year. Flowering can be expected from their third or fourth year.

Agapanthus 'Adelaide' is generally pest- and disease-free. Foliage may be attacked by red spider mites, thrips, and mealy bug but need only be sprayed if infestation is severe. Agapanthus are famous for harbouring snails, although the snails do not seem to cause any damage to the plants themselves. The best way to combat them is to remove them by hand or to keep ducks. Botrytis, visible as brownish lesions, may attack the flowers preventing them from opening. There is no cure, it can only be prevented by spraying before and after the buds break open. The foliage may be attacked by the fungus Macrophoma agapanthii causing die-back of the leaves, and in severe cases can be combatted with a fungicide like mancozeb or captab as a full cover spray.