Plant a variety of species, repeating some species several times to make the Garden look natural. Ideally, rock Garden plants should spread slowly. Take care not to overplant. Plant Selection Many types of plants are suitable for rock Gardens. Generally, plants that are low growing and have a clumping habit are preferred.
Perennial plants are most common in rock Gardens, although some annuals can be used.
Table 1 lists many rock Garden plants, along with their characteristics and cultural requirements. Remarks Aethionema grandiflorum Persian stonecress 6-12 in. Ajuga reptans Carpet bugle 4-10 in. Alyssum montanum Mountain alyssum 4-8 in. Sun Dry, rocky Yellow April-May Gray foliage.