PEROVSKIA CASPIAN™ BLUE VEGETATIVE CULTURE SHEET
Recommended Containers: 1 gallon containers and larger
Light: Russian sage likes full sun. It will survive in partial shade but it will become leggy and probably need staking.
Moisture: Perovskia atriplicifolia (Russian sage) is fairly drought tolerant.
Hardiness: USDA Zones 3 – 9
Blooms: July -Sep
Height: 36″ – 48″
Propagation: Start new plants from softwood tip cuttings in spring or from semi-woody cuttings with a heel in summer. It is best if the cuttings do not have flowers. Seal the cuttings around soil (do not leave air space or the cuttings will not root) by watering in the soil slightly after sticking or pinch soil around cutting.
Use rooting hormone for both applications above to increase speed of rooting and even off crop time.
Temperature Requirement: Day – 75 to 80 F (24 to 27C)
Night – 68 to 72F (20 to 22C)
Run the mist the first night or two after sticking. The suggested frequency would be every two hours so cuttings do not dehydrate completely. Cuttings should root in 5 to 6 weeks. Once the cuttings are established, place them in a cooler area for remaining rooting time at roughly 4 weeks.
Rooting Media and pH requirements: Perlite or composted bark (or similar aggregate) at 45% or higher (55% peat) would be suggested for rooting. Perovskia is sensitive to overwatering even during rooting.
pH range of 6.0 to 6.5 is acceptable. EC of 0.5 to 0.8 once the plants are rooted and growing.
Fertilizer requirements: Feed at 100 to 150 ppm N with minor elements included. Use Nitrate versus Ammonium based formulations. Alternate clear water irrigations to keep salts at proper level. Once plants are established, feed can be increased to 200 ppm N.
Pinching requirements: Pinch plants at 3 or 4 weeks after sticking and once plants are well established to build base plant and create branching.
Disease and insect pests: Drench with preventative fungicides at day 7. Also spray with broad spectrum foliar fungicide to eliminate black spots, Botrytis and other diseases.