Erica oblongiflora grows naturally in limestone soil but can easily adapt to growing in soil with a pH ranging from 5.5-6.7, it also grows well in a full sun position.

It is worth noting that ericas that naturally grow in acidic soil will not tolerate being planted in limestone soil, however those that grow in alkaline soil will tolerate acidic soils, a phenomenon that is not yet well understood. This plant needs soil with good drainage especially when planted in pots. The plant may be pruned after flowering to encourage new growth and to generally clean up the plant by removing dead or damaged wood. Matured compost can be used when planting directly into the ground, organic fertilisers may be added in very low concentrations, but ericas do not respond well to chemical fertilisers. Organic liquid fertiliser is ideal for potted plants.

Erica oblongiflora can be successfully propagated by taking ±40-50 mm long cuttings, ideally two months after flowering, as a general rule for propagating ericas. Use a rooting medium of fine-milled bark and perlite balls at a 50:50 ratio to improve the chances of successful rooting.  Propagation of this plant by cuttings is a much easier approach, seed sowing is a longer process because seeds need to be treated for example soaking it in a ‘fynbos smoke liquid’ (an extract from fynbos plants) before sowing.

Transplant rooted cuttings into small pots, once the root system has well developed it can be transplanted into half-litre plastic bags, use a mixture of 7 parts milled bark and 3 parts sand, and harden the cuttings off for a month before placing in open environmental conditions where it will receive full sun. The rooted cuttings respond best to an organic liquid fertiliser applied every two weeks. The cuttings will be ready for planting after about 3 months.

Use equal parts of river sand and sifted composted bark as a sowing medium, and 100 mm deep seed trays are ideal to hold the mix. Prevent sowing seeds too densely by mixing them with fine river sand when broadcasting. Water carefully with a fine hose to prevent seeds from being washed from the tray, and shade the seeds lightly.

The application of an organic or systemic pesticide can be used to control pests like mealybug, red spider mites and scale insects commonly found on this plant. Root rot can be prevented in plant beds or pots by planting in soil or a potting mix with good drainage. Do not sow seeds too densely and ensure good air circulation in the propagation unit to prevent fungal attacks on the young plants.