Tree · Lauraceae
Sassafras
Sassafras albidum
A fast, easy native that explodes into orange, red, and purple every fall and spreads with real gusto.
Full sun
Every 7–14 days
USDA 4–9
30–60 ft · 9.1–18.3 m
Overview
Sassafras is a joy to watch grow. One branch throws three different leaf shapes, from a plain oval to a two-lobed mitten to a three-lobed glove, so no two twigs match. Then fall hits and the canopy blazes orange, red, and deep purple, and a quick crush of a leaf or scratch of the bark sends up the warm, spicy scent that made this tree a kitchen and root-beer legend.
It grows fast and asks for little beyond full sun to partial shade and moist, acidic, well-drained ground, shrugging off cold to zone 4. Plant one and you get more, because the shallow roots keep pushing up suckers that build into a lively thicket. That drive makes it a gift for a wild edge and a job to tame in a tidy lawn.
There is one hard limit to respect. The roots and bark pack safrole, the very compound behind that heady scent, and it is a liver toxin the FDA pulled from food in 1960. Grow sassafras for the color it throws and the wildlife it draws, and leave the old root teas out of it.
Care
The short version: plant it in full sun to part shade and moist, acidic, well-drained soil, keep the water coming while it is young, hand it room for those roaming roots, and chase down the suckers whenever you want one clean trunk.
Light
Plant sassafras in full sun and it fires up the boldest fall color going, though it still performs in partial sun or partial shade. A young tree reaches for the brightest light, so give it open sky and watch it take off.
Water
Keep a young sassafras evenly moist and water it every 7 to 14 days while it powers up its roots. Once it is established it powers through dry spells on its own. It thrives in moist, well-drained ground and sulks in soggy clay, so drainage is the thing to nail.
Soil
Set it in moist, acidic, well-drained loam or sandy soil at a pH of 6.0 to 7.0 and it digs right in. It takes clay and dry sites in stride, but alkaline ground drags it down, yellowing the leaves with chlorosis.
Temperature
This tree is built to take it. It powers through winter lows near -29°F (-34°C) and summer highs up to 100°F (38°C), a span that covers nearly the whole temperate eastern US, so weather rarely slows it down.
Humidity
Plain outdoor air is all it wants, so skip the humidity fuss. What pays off is good airflow, which keeps the minor leaf fungi from gaining a foothold and keeps the foliage looking sharp.
Feeding
An established sassafras practically feeds itself. On poor ground, a balanced slow-release tree fertilizer in spring gives it a boost, while a tree in decent soil charges ahead with nothing added.
Pruning
Get in there in late winter to cut out dead or crossing branches and clip root suckers if you want one clean trunk. Feeling bold? Cut the whole tree to the ground every 2 to 3 years and it springs right back at shrub height.
Repotting
Sassafras wants open ground, full stop. Its deep taproot makes pots and the moving of an established tree a losing battle, so pick a great spot, plant it, and let it charge ahead undisturbed.
Size & spacing
Give it real space to run. A mature sassafras rockets to 30 to 60 feet (9 to 18 m) tall and spreads 25 to 40 feet (7.6 to 12 m) wide, and the suckers keep pushing the colony wider than that.
When to plant
Sassafras keeps a brisk seasonal rhythm worth following. Get young plants in the ground in spring once frost clears, catch the greenish-yellow flowers from March to May as the leaves push out, and cheer on the bluish-black drupes on red stalks as they ripen from late summer into early fall.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Sow: Not typical; seed needs cold-moist stratification, so sow outdoors in fall or stratify 2-4 months before spring sowing
- Plant: Spring, after the last frost, using young container or root-sucker plants
- Harvest: Greenish-yellow flowers March to May before or with leaf-out; bluish-black drupes on red stalks ripen late summer to early fall
Hardiness
USDA hardiness zones: 4–9
Temperature: down to -34°C
Troubleshooting
Sassafras throws few real problems your way. Most of the action is the tree spreading with gusto or a handful of pests grazing the leaves, both easy to handle. The one that demands attention is laurel wilt in the southeast. Spot your symptom below and move on it early.
Branches wilting fast with dark streaks in the wood
Here is the one to take seriously: laurel wilt, a fungus the redbay ambrosia beetle drives into the sapwood, plugging it and dropping a tree once it grabs hold. Scan the trunk for pinhole beetle holes, toothpick-like frass tubes, and dark staining under the bark, and get a diagnostic lab to confirm it in the southeastern range. No cure exists, so act fast: remove and chip or burn affected trees, and never move untreated wood that could ferry the beetle onward.
Fix:
- No effective cure once infected; remove and properly dispose of (chip or burn) dead and dying trees to reduce beetle breeding sites
- Do not move untreated wood that could spread the beetle
A burst of new shoots springing up around the tree
That energy is root suckering, and sassafras throws itself into cloning across the ground. Nick or cut the shallow lateral roots and you only fire up more shoots, so leave them be. Mow or cut the suckers through the season, dig out what you can grab with a length of root, and drop in a buried barrier or a mowed strip to keep the colony in its lane.
Fix:
- Mow or cut suckers to the ground repeatedly through the season
- Dig out unwanted suckers with attached root where practical
- Install a root barrier or maintain a mowed strip to contain the colony
Chewed, lacy leaves flecked with spots
Chewed foliage usually means Japanese beetles and other feeders like scale, and the spots trace to leaf spot fungi or powdery mildew. On an established tree this barely registers, staying purely cosmetic. Flick the beetles into soapy water, rake up fallen leaves to knock back the spores, and bring out horticultural oil only when scale piles up.
Fix:
- Hand-pick or knock Japanese beetles into soapy water
- Tolerate minor leaf spot; rake and remove fallen leaves to reduce fungal inoculum
- Treat heavy scale infestations with horticultural oil
Toxicity
One rule keeps the fun safe: the roots, bark, and oil stay out of any mouth. They carry safrole, a liver toxin flagged as a likely carcinogen and banned from food since 1960. The leaves are low-risk to handle, so just stop people and pets from chewing the woody parts or brewing homemade teas.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds · People
Cats Caution
The aromatic roots and bark are loaded with safrole, which hits a cat's liver hard, so the risk is a cat gnawing or licking those woody parts, not brushing the leaves. Stash cut roots, bark, and any sassafras oil where a curious cat cannot get at them.
Dogs Caution
A dog that chews bark, digs at roots, or gets into sassafras oil takes on safrole, which grinds away at the liver over time. The leaves stay low-risk, but the woody parts do not, so keep fallen branches and stored roots out of reach.
Horses Caution
Let a horse browse the bark or roots and it meets the same liver-toxic safrole. Fence horses back from any trunk within reach, and haul off any prunings that land in the paddock.
Rabbits Caution
A small animal takes only a small dose, so keep rabbits from nibbling the bark or roots where safrole concentrates. Hold them well clear of the trunk and any trimmings.
Livestock Caution
Cattle, goats, and sheep that strip bark or chew exposed roots load up on safrole, which taxes the liver. Keep grazing animals watched near the tree and drag any felled wood clear of the pasture.
Birds Caution
Wild birds tuck into the ripe bluish-black drupes with no trouble, since the safrole rides in the woody roots and bark, not the fruit. Even so, keep caged or backyard birds from pecking at bark or root pieces.
People Caution
Old teas and file powder trace back to this tree, yet safrole is a liver toxin and a likely carcinogen the FDA banned from food in 1960. Homemade root or bark teas and sassafras oil are unsafe at any amount, so leave them be and keep children from chewing the bark.
Foliage contact is low-risk, but do not let people or pets chew or ingest roots, bark, or sassafras oil. Avoid homemade root/bark teas and oil.
Helpline numbers
United States
ASPCA Animal Poison Control: (888) 426-4435 (fee applies)
Poison Control: (800) 222-1222
Canada
Poison Centres: 1-844-764-7669
Varieties
No cultivar rabbit hole to fall down here. Sassafras is grown almost entirely as the wild native species, so you plant the real thing and let it shine.
Sassafras albidum (species)
This is the straight native form, grown for its three leaf shapes and its knockout orange-red-purple fall color, and named cultivars are almost nowhere to be found.
How to propagate
Multiplying sassafras is genuinely rewarding, since the tree hands you new plants through its own roots and suckers. Keen growers with patience can also raise it from stratified seed.
SeedModerate
Sow outdoors in fall, or cold-moist stratify 2-4 months and sow in spring · Several months to germinate; 1-2 seasons to establish
Sassafras seed refuses to budge until it has ridden out a cold, moist spell, so sow it outdoors in fall or stratify it for 2 to 4 months and sow in spring. Strip the fleshy pulp off the fruit first. Then hold steady, because germination runs to several months and the seedling wants a season or two to dig in for good.
Stem cuttingsDemanding
Dig dormant root pieces or detach rooted suckers in late winter to early spring · One growing season
The fastest win is digging dormant root pieces or lifting the rooted suckers the tree keeps throwing up, working in late winter to early spring while it rests. Give them a single growing season and they take off. Trying to shift a bigger plant rarely pays, all down to that deep taproot.
LayeringModerate
Spring · One to two seasons
Sassafras layers itself through its roaming root suckers, so come spring you can sever a small one and plant it somewhere new. Give it one to two seasons to root down and stand on its own, and it will reward the wait.
Myths
Sassafras root and root-beer flavoring are a harmless natural tonic.
That famous aroma comes from safrole, a hepatotoxin and a likely human carcinogen. It drove liver tumors in lab animals, which is exactly why the FDA banned safrole and sassafras oil from food back in 1960. Natural is not the same as safe, so the old root tonics stay firmly off the menu.