Should properly be called Salvia rosmarinus since 2017, but as of this typing, it has not caught on.
Foliage intensely aromatic when even so much as brushed, as with lavender.
Soil must dry out between waterings. Plants in good sites may grow too fast and thin; drought stress keeps the plants dense. Little fertilizer usually needed. Intolerant of heavy clay, especially in winter. AHS recommends siting against a sunny south-/west-facing wall.
The species is not recommended north of Sunset zone 32 except in pots or as an annual. However, 'Arp', 'Athens Blue Spires', 'Madeline Hill', and 'Salem' are supposedly hardy to USDA zone 6 (the last to Salem, MA, hence the name). 'Alcalde' is claimed to survive even in USDA zone 5.
Sources: Sunset, Dirr, Odenwald/Turner, Missouri BG, AHS, NCSU, USDA, Druse.
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