Golden rockrose (Halmium) is the other genus apart from Cistus. This dense rounded shrub to 2′ x 3′ is clad in evergray foliage and appreciates average, well drained soil in full, all day sun. Water to establish then only light occasional summer water. Blooms which are bright yellow and silky have a central zone of burgundy. One of the common monikers is ‘Black Eyed Susan Shrub’. Produces a great wildflower display for weeks in May to July. Lifespan is about 5-7 years but flowering is so profuse and long the risk is worth it. Cold hardy to 5ºF. Mediterranean native. Plant with Cistus, Grevilleas, Arctostaphylos, Pacific Coast Iris. Prune lightly after blooming has ended to shape, encourage a denser habit.
Halimium ocymoides
Family: Cistaceae Genus: Halimium
Plant type: Shrub
Biomes/Growing conditions: Deer Resistance, Hot Aspects, Low Water/No Water, Oregon Coast
Sun exposure: Full Sun
USDA Hardiness zone: Zn7b 10º to 5ºF
Foliage color: Silver/Gray
Foliage season: Evergreen