Scientific Name : Perovskia atriplicifolia
Common Name : Russian Sage
Hardiness Zone : 4a - 9b
Hardiness Degree : -30°F (-34°C)
Blooming Season : Summer, Autumn, Late Summer
Plant Habit : Upright
Characteristics : Deer Resistant, Drought Tolerant, Attracts Hummingbirds, Winter Interest (regional), Colorful/Attractive Foliage, Fragrant Flowers, Scented Foliage, Low Maintenance
Water : Medium
Fertilizer : Every two weeks
Spacing : 12 - 14" (30 - 36cm)
Height : 36 - 60" (91 - 152cm)
Width : 12 - 18" (30 - 46cm)
Exposure : Sun
General Information : Few plants can compare or compete with the unusual stem coloring, light blue flowers, open airy flower heads, and noninvasive nature that this plant has to offer.
Idea & Tips : Do not allow crown to be covered and stay wet during the winter. For best habit grow in full sun.
Grower Information : Spikes of light blue flowers over aromatic, gray-green foliage. Standard variety Perovskia.
Daylength : Perovskia will flower under any daylength after cold treatment and will flower without cold treatment under long days.
Propagation Information : Reduce mist as soon as possible. Apply preventative fungicide spray after sticking.
Cool Treatment :
Plant Maturity: Cold treatment beneficial, but not required for flowering. Plants should be bulked under natural short days for a 4-8 week period. Mature, bulked up plants will respond more favorably to cold treatment.
Temperature: 35-41°F
Duration: 6-15 weeks
Benefits: Increased number of flowers; increased branching; more compact habit.
Plant Growth Regulators : B-Nine (Spray) 2,000-4,000 ppm, B-Nine 2,000-4,000 ppm/ Cycocel 1,000-1,500 ppm tank mix (Spray) or Sumagic (Spray) 5-20 ppm.