Scientific: Santolina chamaecyparissus
Common: lavender cotton
Family: Asteraceae
Origin: Native to the Mediterranean, including Spain and Morocco.
Pronounciation: San-to-LEE-na cha-ma-e-ci-PAR-is-sus
Hardiness zones
Sunset All as annual, perennial in zones 8-24
USDA All as annual, perennial in zones 8-11
Landscape Use: Low border or edging plant for oasis landscape design themes, sensory gardens, gray color accent.
Form & Character: Mounding, clean, refined, pungent, unobtrusive, recessive.
Growth Habit: Evergreen, woody, perennial subshrub, slow growth rate to 2-feet tall, but with light shearing can be maintained at 1-foot tall with a greater spread.
Foliage/Texture: Sessile, small highly pinntified aromatic, gray leaves to 1/2-inch long; fine texture.
Flowers & Fruits: Yellow button flowers on 6- to 12-inch peduncles in spring, not necessarily attractive and should be sheared to oblivion when they appear in order to preserve the elegance of the clean, mounding form.
Seasonal Color: None
Temperature: Cold tolerant to 0oF and heat tolerant to 115oF.
Light: Full sun, no shade.
Soil: Tolerant of various soil conditions, however soils MUST be well drained! Sandy soils are best.
Watering: Infrequent once established, more frequent during summer.
Pruning: Periodic light shearing will maintain an attractive dense habit. As written above, make sure to shear off flowers in the later spring to preserve the tight growth habit.
Propagation: Softwood cuttings, easy to propagate from seed too.
Disease and pests: Fungal root and basal crown rot is a problem if soil is poorly drained.
Additional comments: In Phoenix, lavendar cotton is a nice, aromatic, perennial sub-shrub for oasis and xeric gardens with drip irrigation, fertilize rarely. The leaves can be used in flavoring sauces or dried in Pot-pourri. It is also thought to be deer and rabbit resistant. This attractive border plant tends to look best when young.
Taxonomic tidbit: The species name 'chamaecyparissus' means 'dwarf cypress' .