ericaceous

Of or pertaining to the heath family (Ericaceae).

Acid-loving, thriving in acidic conditions.

Ericaceous plants include camellias, hollies, hydrangeas, and maples as well as members of the Ericaceae.

Ralph E. Martin, a New Jersey engineer and gardener, concurs that coffee grounds for general garden and lawn use are too acid. He recommends small quantities for ericaceous (acid-loving) ornamentals.

acidic, acid-based

Camellias thrive when fed with an ericaceous fertiliser.

Acid-loving plants such as camellias, heathers, azaleas and rhododendrons are best planted in an ericaceous (acid) potting mix.