Ornamental · Lamiaceae
Russian Sage
Perovskia atriplicifolia
Hand it full sun and dry, sharp-draining soil, and Russian sage will thank you with a soft haze of blue from midsummer into fall.
Full sun
Every 10–21 days
USDA 4–9
2–4 ft · 0.6–1.2 m
Overview
If Russian sage is new to you, relax, because it is one of the most forgiving perennials you can plant. It grows on woody stems dressed in silvery foliage and lifts clouds of tiny blue flowers above them. The name fools almost everyone, since the plant comes from central Asia and is no relation to the sage in your spice rack. What you get in return for very little effort is a long season of bloom and an easy tolerance for drought, heat, and poor soil.
Here is the reassuring part: this plant actually prefers the tough spots where fussier flowers give up. Tuck it into a hot, dry bed with lean soil and it settles right in, no coddling required. The scented leaves even discourage deer and rabbits from nibbling, which is one reason it turns up so often in water-wise, low-care gardens. If you have struggled with thirstier perennials before, this one lets you off the hook.
The one thing to remember is that Russian sage likes to be kept a little hungry. Give it rich soil, shade, or heavy watering and it answers with floppy, weak stems that split open by midsummer, but that is easy to avoid and easy to fix. Keep the ground lean and sunny, cut the plant back hard each spring, and you will be rewarded with upright stems and a blue haze that lasts for months. Small mistakes here are rarely fatal, so plant with confidence.
Care
The short version: full sun and sharp drainage matter more than anything, and both are easy to give. Keep the soil lean and on the dry side once your plant has settled in, hold back on fertilizer, and cut every stem down almost to the ground in late winter. Get those right and the rest takes care of itself.
Light
Give your Russian sage as much sun as you possibly can. It will hang on in part shade, but the stems tend to stretch, soften, and lean, and the flowers grow sparse. Full sun is simply what keeps it standing tall and blooming happily, so pick your brightest spot and it will thank you.
Water
Once your plant has settled in, it becomes one of the most drought-tolerant perennials you can grow, which is wonderful news if you tend to forget the watering can. Give it steady water through that first season so it can sink deep roots, then ease right off and let the soil dry between drinks. Soggy ground troubles it far more than dry ground ever could.
Soil
Sharp drainage is the one thing your Russian sage truly needs, and happily most gardens can offer it. Poor, dry, clay, and even alkaline ground are all fine, and it stays content across a wide pH of 6.0 to 8.0. Just steer clear of wet, heavy soil, which is the one condition that can rot the roots.
Temperature
This is a tough plant that takes weather in stride, shrugging off winter cold down to -29°F (-34°C) and summer heat up to 100°F (38°C). That easygoing range is exactly why it feels at home across zones 4 to 9, so it very likely suits your area with no fuss.
Humidity
Dry air is no bother at all here, which suits a plant that loves hot, sunny spots. Damp, stagnant air is more likely to cause trouble than dry air, so give it a little elbow room and good airflow and it will stay healthy.
Feeding
Go easy at the feed bench, because with Russian sage lean soil and little or no fertilizer is the goal. A light feed in spring is plenty, and truly none is fine too. Overdo it and you will end up with a tall, floppy plant on weak stems, so when in doubt, feed less.
Pruning
Do not be shy with the shears, since cutting every stem back almost to the ground in late winter or early spring is the kindest thing you can do. Wait until new growth just begins to show, then make that hard cut. It is what pushes up strong, upright flowering shoots and keeps the plant from sprawling open later on.
Repotting
Good news for the busy gardener, since this plant rarely needs repotting and is happiest simply left where it is. If you do keep one in a container, just keep an eye out for roots circling the pot or water rushing straight through, both gentle hints that it has outgrown its home.
Size & spacing
Give your Russian sage some breathing space, since a mature plant reaches 2 to 4 feet (60 to 120 cm) tall and spreads about as wide at 2 to 4 feet (60 to 120 cm). Leaving that much room lets air move freely and gives the stems space to stand up straight, which keeps the whole plant looking its best.
When to plant
Russian sage is hardy through zones 4 to 9 and takes its time waking up in spring, so do not worry if it looks bare while everything else greens up. Set young plants out after your last frost, trim the old growth back as fresh shoots appear, and the flowers will open from July and keep going right through October.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Sow: late winter to early spring; seed germinates in 1-4 months at 60-65 degrees F
- Plant: spring after last frost
- Harvest: July to October
Hardiness
USDA hardiness zones: 4–9
Temperature: down to -34°C
Troubleshooting
Russian sage rarely gives you trouble, and the two problems that do show up both come from the same kindly mistake: a little too much water or soil that is a bit too rich. Catch the early signs and the cure is gentle and simple, since drying things out and opening the plant to sun usually sets it right.
A wilting plant sitting in soggy soil
If your Russian sage droops even while the soil stays wet, the culprit is nearly always root rot brought on by heavy, soggy ground. That constant dampness invites pythium and phytophthora, which soften and brown the roots. Do not lose heart though, since shifting the plant to a raised, sharply drained spot, watering much less often, and letting go only of one that has rotted too far to save will usually turn things around.
Fix:
- Improve drainage or move to a raised, sharply drained site
- Reduce irrigation and let soil dry between waterings
- Remove and discard severely rotted plants
The stems lean apart and the center opens up
This one is the well-known flop, and it is almost always a sign of too much shade or soil that is a little too rich and damp, which coaxes out weak, leggy stems. Plants left standing over winter tend to fall open the same way once they finish blooming. The good news is the fix is gentle: move it into full sun on lean, dry ground, go lighter on water and feed, and cut it back hard when spring comes.
Fix:
- Cut stems back almost to the ground in late winter to early spring
- Move or site in full sun with lean, well-drained soil
- Reduce watering and fertilizer
Toxicity
Here is welcome news for anyone with pets or little ones underfoot. The ASPCA lists Russian sage as non-toxic, so a cat, a dog, or a curious toddler can brush against it or sneak a taste and come away with nothing worse than a strong flavor. The only thing to keep in mind is that it is not a kitchen herb, so enjoy the scent and leave the cooking to real sage.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
Perfectly safe for cats. The ASPCA lists it as non-toxic, so if your cat sneaks a curious nibble of the fragrant leaves, there is nothing at all to worry about.
Dogs None
No toxicity to dogs has ever been reported. A dog that gnaws a stem might wrinkle its nose at the strong scent, but it will come to no harm at all.
Horses Safe
Horses can graze nearby without any trouble. Nothing in the plant is poisonous, though the bitter, aromatic leaves usually send them looking for tastier bites elsewhere.
Rabbits Safe
Rabbits tend to leave it be, and that is a happy bonus rather than any kind of risk. The pungent foliage is completely safe, just rarely tempting to them.
Livestock Safe
No need to worry about cattle, goats, or sheep. The plant holds no known toxins, and its sharp scent generally steers grazing animals toward other plants.
Birds Safe
Entirely harmless to birds. The summer flowers bring in pollinators, and the plant poses no danger to anything that stops by for a visit.
People Safe
Safe to handle and to grow around children. Despite the name it is not a cooking sage, so breathe in the scent freely but keep it out of the kitchen.
Aromatic foliage; despite the common name it is not a true culinary sage and should not be eaten.
Varieties
Most of the named Russian sages have been chosen to stand a little taller and flop a little less than the wild plant, which makes them friendly picks for a first-timer. These are the ones you are most likely to find at the garden center.
Little Spire
A tidy, compact choice that tops out around 18 to 24 inches (2 feet) and carries itself more upright, so it stays neat and flops far less than the wild species.
Blue Spire
An upright grower reaching close to 3 feet, with deeply cut leaves and generous panicles of violet-blue flowers to enjoy.
Longin
A tall, slender selection that climbs to about 4 feet in both height and width and holds a notably stiff, very upright shape.
Filigran
A graceful pick at 2 to 3 feet tall, dressed in finely cut, lacy foliage on a neat upright frame.
How to propagate
Making more Russian sage is easy enough from either cuttings or seed, and there is no wrong way to try. The method you pick only matters if you have your heart set on a particular cultivar looking just like its parent.
Stem cuttingsModerate
Summer · Several weeks to a few months
Cuttings are your surest way to copy a named cultivar, since seed-grown plants will not come true. Snip softwood cuttings 3 to 4 inches long in summer, and over several weeks to a few months they will root into new plants identical to the parent you love.
SeedModerate
Any time of year, just covering the seed · Germinates in 1-4 months at 60-65 degrees F
You can scatter seed just about any time, barely covering it, but patience is the key here because germination takes 1 to 4 months at 60°F to 65°F (16°C to 18°C). A cold spell beforehand can nudge the odds in your favor, and since seedlings of the species vary, expect a little charming difference from plant to plant.
DivisionDemanding
Spring · Slow
Division is the trickiest route and rarely worth the effort. This woody-based subshrub does not like being split, is slow to bounce back in spring, and hardly ever needs dividing anyway, so cuttings or seed will serve you far better.
Myths
Russian sage is just another cooking sage you can toss into the pan like garden sage.
It is actually Perovskia, now reclassified as Salvia yangii, and it is grown for looks alone rather than for the kitchen. Crushed leaves give off that lovely sage scent, but the flavor has no place in your cooking. It is neither truly Russian nor a real sage, but a native of central Asia, so enjoy it in the border and save the real herb for dinner.