Plant Russian sage from pots in early spring (Almanac, Wisconsin), or any time until about a month before a hard frost (Wisconsin); in mild-winter areas, fall is ideal (UC). Give it full sun and sharp drainage, space plants about 18 inches to 3 feet apart, water through the first season, then leave it mostly dry (NC State, Wisconsin, UC). Leave the stems standing over winter and cut back hard in early spring (Almanac, Wisconsin, RHS). Named cultivars are best started from softwood cuttings, not seed (Wisconsin, NC State).
Russian sage is a woody-based perennial from southwestern and central Asia in the mint family, now classed as Salvia yangii and long sold as Perovskia atriplicifolia (NC State, RHS). It makes a 2- to 4-foot mound of silvery, aromatic stems topped with lavender-blue flower spikes from about June to October (NC State); the Almanac and UC give heights up to 4 or 5 feet, and the RHS lists 1 to 1.5 meters. Wisconsin notes it was named the Perennial Plant of the Year in 1995 and blooms for up to two months.
When to plant Russian sage
| Timing | What the sources say |
|---|---|
| Early spring (container plants) | The Almanac and Wisconsin both favor early spring for potted plants |
| Through summer, up to a month before a hard frost (container plants) | Wisconsin says potted plants can still go in through the summer if they get a month to root before a killing frost |
| Fall (mild-winter areas) | UC Master Gardeners in coastal San Luis Obispo County call fall the ideal planting time there |
| Any time indoors, then out in late spring (seed) | Wisconsin says germination takes 1 to 4 months at 60 to 65°F and that 10 days to 6 weeks of cold at 35 to 44°F may help; harden seedlings off and plant out in late spring |
| Late spring or summer (cuttings) | Wisconsin and the Almanac root 3- to 4-inch softwood cuttings; the RHS takes softwood cuttings in late spring or semi-ripe cuttings in summer |
| Spring, every 3 to 4 years (dividing) | The Almanac divides clumps every 3 to 4 years; Wisconsin calls division possible but slow |
Use our planting calendar to find your frost dates. The sources agree on spring for cold-winter gardens and differ mainly for mild climates, where UC prefers fall so roots grow during the cool, wet months. Seed is slow and variable, taking 1 to 4 months to sprout (Almanac, Wisconsin), and NC State says the named cultivars are superior to seed-grown plants, so most gardeners buy potted plants or root cuttings.
How to plant Russian sage
| What the sources say | |
|---|---|
| Hardiness | Zones 5a to 9b (NC State); 4 to 9 (Wisconsin, Almanac). The RHS rates it H5, hardy in a cold winter |
| Light | Full sun (NC State, Wisconsin, RHS); essential, or it sprawls (UC) |
| Soil | Well drained, avoid wet sites (NC State); poor to moderately fertile chalk, loam or sand (RHS) |
| Depth | Set container plants at the depth they grew in the pot (Almanac) |
| Spacing | About 18 inches (Almanac, Wisconsin); 2 to 3 feet (UC) |
| Size | 2 to 4 feet tall and wide (NC State); 3 to 5 feet tall and 2 to 4 feet wide (UC); 'Little Spire' about 2 feet (NC State, Almanac) |
The Almanac roots 3- to 4-inch softwood cuttings with rooting hormone in a few weeks and says runners at the edge of a clump can be dug and potted. NC State and the Almanac list compact cultivars such as 'Little Spire' and 'Blue Spire' for smaller beds.
Watering, feeding and pruning
- Water the first season (Almanac, Wisconsin). UC waters 2 to 3 times a week in year one, then weekly, and warns that overwatering causes root rot.
- Feed lightly or not at all. Wisconsin fertilizes before new growth starts and UC uses a 5-10-5 fertilizer after the spring cutback; the RHS prefers poor to moderately fertile soil.
- Cut back in early spring. NC State cuts to several inches, the Almanac and Wisconsin to about 1 foot, and UC to about 2 inches. The RHS puts it in its group for hard pruning in early spring.
- Watch for spread. UC says to monitor it, and the Almanac says runners can be removed and potted.
- Divide every 3 to 4 years (Almanac).
Russian sage in containers
UC says it can grow in containers if it gets enough water. Our reading is to use a large pot with drainage holes and a gritty mix, pick a compact cultivar such as 'Little Spire', and let the top inch or two dry between waterings, since soggy soil is what rots it (GardenPal reasoning).
Fall and winter
- Leave the stems standing. The Almanac says not to cut back in fall, and Wisconsin leaves old stems over winter for interest before cutting in spring.
- Sources disagree on fall cutting. NC State allows cutting rangy plants back to about 12 inches after the first hard frost; we'd follow the Almanac and Wisconsin and wait for spring in cold areas.
- Drainage matters most in wet winters (Wisconsin).
Pests and problems
NC State lists no serious insect or disease problems and says some cultivars are fairly resistant to Phytophthora and Pythium root rots. The Almanac notes occasional aphids, spider mites, whiteflies and leafhoppers, plus stem and root rot in wet soil. Flopping late in the season is the most common complaint (NC State), usually from shade, rich soil or too much water (UC, RHS). NC State and the Almanac call it deer and rabbit resistant, and NC State adds that it tolerates salt.
Russian sage around the vegetable garden
NC State lists bees, butterflies and hummingbirds among its visitors, which makes it a good long-blooming nectar plant for the sunny, dry edge of a plot, away from irrigated beds (our reading). See flowers that attract beneficial insects. Wisconsin pairs it with white phlox, rudbeckia, coreopsis and ornamental grasses; see phlox, black-eyed Susans and coreopsis. For other dry-soil perennials, see lavender, salvia and sedum.
Frequently asked questions
When is the best time to plant Russian sage?
Early spring for potted plants (Almanac, Wisconsin). Wisconsin says you can keep planting through summer until about a month before a hard frost, and UC prefers fall in mild-winter areas.
Should I cut back Russian sage in the fall?
The Almanac and Wisconsin say no: leave the stems over winter and cut back in spring. NC State allows trimming rangy plants to about 12 inches after the first hard frost.
How far back do I cut Russian sage in spring?
Hard. NC State cuts to several inches, the Almanac and Wisconsin to about 1 foot, and UC to about 2 inches.
Why is my Russian sage flopping over?
Usually too little sun, too much water or soil that is too rich (UC, NC State, RHS). UC says full sun is essential.
Can I grow Russian sage from seed?
Yes, but it is slow, taking 1 to 4 months to sprout (Wisconsin, Almanac), and NC State says named cultivars are better than seed-grown plants. Softwood cuttings are the usual route.
Is Russian sage the same as Perovskia?
Yes. It was long sold as Perovskia atriplicifolia and is now classed as Salvia yangii (NC State, RHS).
Enter your frost dates to time spring planting and the cutback.
Open itSources
- Virginia Cooperative Extension, "Companion Planting in Gardening" (SPES-620P)
- University of Maryland Extension, "Vegetable Succession and Companion Planting"
- Oregon State University Extension, "Companion Planting"
- Penn State Extension, "Herbs Make Good Plant Partners and Companions"
- University of Minnesota Extension, "Planting the vegetable garden"
- USDA Plant Hardiness Zone Map
- NOAA NCEI U.S. Climate Normals (frost/freeze data)
- NC State Extension Gardener Plant Toolbox, "Salvia yangii"
- The Old Farmer's Almanac, "Russian sage"
- University of Wisconsin-Madison Extension, "Russian Sage, Perovskia atriplicifolia"
- UC Master Gardeners of San Luis Obispo County, "Russian sage"
- Royal Horticultural Society, "Salvia yangii"
Pairings are summarized in our own words from extension-service guidance. Research support for many companion effects is limited, so treat them as good habits, not guarantees.