Ornamental · Crassulaceae
Sedum
Sedum
Give it a sunny sill and soil that drains, and this easygoing stonecrop will happily carry on with barely any help from you.
Full sun
50–77°F · 10–25°C
USDA 3–9
4–24 in · 10–60 cm
Overview
If you have ever worried about keeping a plant alive, sedum is a kind place to start. This cheerful little succulent, also called stonecrop, tucks its water away in plump leaves and stems, so it takes dry stretches in stride and forgives a forgotten watering. It belongs to the Crassulaceae family, and because the group is hardy across zones 3 to 9, there is a sedum for almost any home, from a bright windowsill to an open rooftop.
Part of the joy is that no two sedums look quite alike, so there is little pressure to pick the perfect one. Some settle into neat upright clumps and lift flower heads in late summer. Others trail low across the ground, rooting as they wander, which is why they feel so at home in rock gardens and between paving stones. Depending on the kind you choose, expect anywhere from 4 to 24 inches (10 to 60 cm) of height.
There is really only one way to let a sedum down, and the good news is that it is easy to sidestep. Give it gritty, quick-draining soil and a sunny spot, and it will more or less look after itself. Trouble comes from soggy ground, which softens the stems, so when in doubt, water less. Get that one thing right and you will find this plant very hard to fail.
Care
The short version: sedum loves full sun and gritty soil that drains fast, and it only wants water once the mix has dried right through. Feed it a little during the growing season, pinch off any stems that stretch, and keep it clear of standing water. Do that, and you are set.
Light
Sedum is happiest in full sun, a few hours a day if you can manage it, which keeps the growth snug and the color rich. It will get by in partial sun or a bright indirect corner indoors too, so do not worry if your light is not perfect. Just know that a dim spot leaves the stems long and floppy.
Water
Give it a good, thorough drink, then simply wait until the soil has dried out completely before the next one. Those plump leaves keep a reserve tucked away, so a missed watering bothers it far less than a soggy one ever would. Standing water is the quickest route to rot, so lean toward too little.
Soil
Plant your sedum in a gritty, well-drained mix that lets water slip straight through. A pH somewhere between 6.0 and 7.0 suits it nicely, though honestly the drainage matters far more than hitting an exact number. The one thing to steer clear of is heavy, water-holding soil.
Temperature
Sedum feels right at home between 50°F to 77°F (10°C to 25°C), which covers most rooms without any fuss. The tough outdoor types even shrug off winter in zones 3 through 9, while indoor plants stay perfectly content at everyday room warmth.
Humidity
Dry indoor air is no trouble for sedum at all, which makes it a kind choice for centrally heated rooms. There is no humidity target to chase here. If anything, damp, stagnant air does more harm than good, so let it breathe.
Feeding
A light hand is all it takes. Feed it from spring through summer while the plant is actively growing, roughly once a month, using a balanced water-soluble fertilizer cut to half strength. Too generous a feed pushes soft growth that rots and tempts pests, so gentle really is best.
Pruning
Once the blooms have faded, snip off the spent stalks to freshen things up. Pinch back any stems that have stretched to keep the plant nicely compact, and clear away soft, rotted growth the moment it appears. None of it is fussy work.
Repotting
Move sedum into a fresh pot every 2 to 3 years, or a little sooner if the roots have filled the container and the soil dries out surprisingly fast. Slowed or stunted new growth is another gentle hint that it would welcome more room.
Size & spacing
Depending on the type, plants reach 4 to 24 inches (10 to 60 cm) tall and spread to about 12 to 24 inches (30 to 60 cm) across. Give the creeping kinds room to knit together, and leave the clumping kinds a little breathing space for air to move through.
When to plant
Because sedum is a hardy perennial, it returns on its own each year, so there is no anxious seed schedule to keep. Set it out or divide it in spring while fresh growth is coming on, and the flowers will follow from summer into fall, arriving a little earlier or later depending on the species. No rush, and no wrong week to enjoy it.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Harvest: Summer to fall depending on species
Hardiness
USDA hardiness zones: 3–9
Temperature: down to -40°C
Troubleshooting
Almost everything that troubles a sedum comes down to water or light, and the stems usually tell you first. Catch those early hints and a fix is well within reach before any real harm is done. Look for your plant's symptom below, then take the gentle step that matches.
Soft, caving stems that feel mushy to the touch
Soft, squishy stems turning dark point to rot, which nearly always begins with overwatering or a mix that stays wet. There is no need to panic. Snip down to solid, living tissue, let the cut ends callus over, and tuck the pieces into dry, gritty mix while you skip watering for a while. A pot with drainage holes, plus soil that dries fully between drinks, keeps the problem from coming back.
Fix:
- Cut away all soft, rotted tissue back to firm healthy growth
- Allow healthy cuttings to callus and re-root in dry, gritty mix
- Withhold water until new roots form
Little white cottony tufts in the leaf crevices
Those soft white puffs in the leaf joints are mealybugs, and the sticky film they leave behind slowly drains the plant's strength. Dab each cluster with a cotton bud dipped in 70 percent isopropyl alcohol, then look the plant over every few days until none are left. Set it apart from the rest of your succulents for a while so they cannot spread, and it will soon perk up.
Fix:
- Dab insects with a cotton swab dipped in 70 percent isopropyl alcohol
- Repeat treatment every few days until clear
- Isolate the plant from other succulents
Long, pale stems leaning toward the glass
When a sedum reaches and pales like this, it is simply etiolation, the plant stretching toward more light. The stems run long, the leaves drift apart, and the color washes out, yet it all bounces back. Shift it to a brighter spot with a few hours of direct sun, then trim the stretched tips so it grows dense again. Even better, those cuttings root without any trouble, so none of it is wasted.
Fix:
- Move the plant to a brighter location with several hours of direct sun
- Pinch or cut back stretched stems to encourage compact regrowth
- Use the trimmed tips as cuttings
Toxicity
Here is a reassuring note for anyone with pets in the house: sedum is safe. Stonecrops hold no toxins that would harm cats, dogs, horses, or other animals, and the ASPCA lists the well-loved burro's tail as non-toxic. A curious taste might bring a bit of tummy upset, as any non-food plant can, but there is truly nothing here to fret over.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
Perfectly fine around cats. Should a curious one take a nibble, the worst you might see is some mild drooling or a passing stomach upset, no different from any plant that was never meant for snacking.
Dogs None
No real worry for dogs. At most, a mouthful might bring a brief bout of stomach upset, and even that does not happen often.
Horses None
Grazing beside stonecrop poses no threat to horses, which find nothing harmful in it.
Rabbits None
Rabbits are safe in its company. Those plump leaves hold nothing toxic, though sedum works best as a houseplant and not as a steady part of a rabbit's menu.
Livestock None
Sheep, goats, and cattle can stay near a planting without harm, since stonecrops are not counted among the plants that poison a pasture.
Birds None
Neither pet birds nor the ones that visit the garden face any danger from sedum, which contains no toxic compounds.
People None
Safe to handle, and a handful of stonecrops have historically been eaten in tiny quantities. Even so, it earns its place as an ornamental, not as something bound for the dinner table.
Varieties
With so many sedums out there, hundreds in all, no single plant sums the genus up. The three below are among the friendliest to find and give a lovely sense of the range.
Sedum spectabile / 'Autumn Joy'
An upright border favorite whose fleshy stems lift broad, flat heads of pink bloom that mellow to rust as autumn settles in.
Sedum acre
Goldmoss stonecrop, a low creeper dressed in tiny yellow-green leaves and topped with a froth of small yellow flowers.
Sedum spurium
A trailing, mat-forming grower whose rounded, scalloped leaves make it a natural choice for rock gardens and green roofs.
How to propagate
Very few plants share themselves as generously as sedum. Even a leaf that drops on its own will often take root where it lands, so turning one plant into many asks almost nothing of you. It is a wonderful confidence-builder.
Stem cuttingsEasy
Spring through summer during active growth · 2 to 3 weeks to root
Take your cuttings through the warm spring and summer stretch. Give the cut ends a day or two to dry and callus over, then press them into gritty mix kept barely damp. Roots appear in around 2 to 3 weeks, and it could hardly be simpler.
Leaf cuttingsEasy
Spring through summer · 3 to 6 weeks to form plantlets
All through spring and summer, whole new plants will grow from a single leaf. Rest the leaves on dry, gritty mix, and small rosettes will push out their own roots at the base within about 3 to 6 weeks.
DivisionEasy
Early spring · 2 to 4 weeks to settle
For the clumping border kinds, division is the way. In early spring, lift the plant, gently tease apart the rooted sections, and replant each one at the depth it grew before, where it settles happily over 2 to 4 weeks.
Myths
Succulents such as sedum live on neglect and never want watering.
Sedum copes with dry spells beautifully, yet it still appreciates a proper soak now and then while it is growing. The real risk sits at the opposite end. It is too much water, not the odd drink, that finishes these plants off.