Herb · Amaranthaceae
Epazote
Dysphania ambrosioides
Give it lean soil and full sun, pinch it often, and epazote hands you that unmistakable Mexican kitchen flavor all season.
Full sun
Every 3–7 days
50–86°F · 10–30°C
60–80 days
Overview
Epazote is the pungent green that gives a pot of black beans its unmistakable Mexican flavor. It belongs to the same family as amaranth and spinach, and it grows wild across much of the Americas as a fast, weedy annual. A single plant in a sunny corner gives you all the leaf a kitchen needs.
It asks for almost nothing. Full sun, lean soil, and the odd drink in its first weeks are enough, and an established plant shrugs off dry spells that would flatten fussier herbs. The catch is its enthusiasm: leave the flowers to ripen and epazote self-sows everywhere, so most gardeners grow it as an annual and keep the spikes cut back.
There is one real caution worth knowing up front. The leaf is a kitchen herb in small amounts, the way it has been used for generations, but it carries an essential oil called ascaridole that is toxic in quantity. Cook with a pinch, never with a handful, and keep the concentrated oil out of the picture entirely.
Care
The short version: full sun, lean and well-drained soil, and regular water only while the plant is young. Pinch the tips for a bushy shape, go easy on feed, and snip the flower spikes before they seed.
Light
Epazote wants full sun, the more the better, though it puts up with a little afternoon shade. Strong light is what concentrates the aromatic oils, so a plant baked in the sun tastes sharper than one grown soft in the shade.
Water
Keep the soil evenly moist while plants are young and rooting in, watering every few days. Once established, epazote turns quite drought tolerant and would rather run dry than sit wet, so ease off and let the top of the soil dry between drinks.
Soil
Give it well-draining loam, though it happily takes poor, dry ground that defeats other herbs. A pH from 6.0 to 7.5 suits it, and lean soil actually sharpens the flavor, while rich beds dull it.
Temperature
Epazote thrives in warmth, growing best between 50°F and 86°F (10°C to 30°C). It has no patience for frost, so wait until the cold has well and truly passed before setting plants outside.
Humidity
Ordinary outdoor air suits it, and 40% to 60% humidity is plenty. There is no number to chase here, but give plants room so air moves freely and the foliage dries quickly.
Feeding
Feed lightly, if at all. A single spring dose of balanced fertilizer is enough, and overfeeding backfires, growing a lush, leggy plant whose leaves lose the punch you grow epazote for.
Pruning
Pinch the growing tips often to keep the plant bushy and to harvest as you go. Just as important, cut the flower spikes the moment they show, which slows bolting and stops the heavy self-seeding before it starts.
Repotting
Container plants are usually grown as annuals and repotted each year. Watch for roots circling the pot or poking through the drainage holes, along with stunted growth and soil that dries out fast, the signs a plant has outgrown its home.
Size & spacing
Plants reach 2 to 4 feet (60 to 120 cm) tall and spread about 12 to 24 inches (30 to 60 cm) wide. Give each one that much room so air moves through and the bushy growth has space to fill out.
When to plant
Epazote is a warm-weather herb with no tolerance for frost. Start seeds indoors in late winter or sow straight into warm spring soil, harvest leaves all through the warm season, and cut the flower spikes in summer before they scatter seed.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Sow: 6-8 weeks before the last expected frost
- Plant: after all danger of frost has passed and soil has warmed
- Harvest: Harvest young leaves and tender stems through the warm season; small green flowers form in summer and should be deadheaded to prevent aggressive self-seeding.
Hardiness
USDA hardiness zones: 8–11
Temperature: down to -12°C
Troubleshooting
Epazote rarely gives a gardener much grief, and the few issues that come up are easy to read. Watch the stems, the seedheads, and the leaves, and you can step in before a small thing becomes a chore. Match what you see below, then act while it still helps.
A carpet of volunteer seedlings the next spring
This is prolific self-seeding, the price of letting the flowers ripen. One plant left to set seed scatters thousands, and they sprout well beyond where you planted. Cut the flower spikes before the seed matures, pull stray seedlings while they are small, and keep seed-bearing trimmings out of the compost.
Fix:
- Pull or hoe volunteer seedlings while small
- Deadhead and remove flower spikes before seed set
Tall stems flopping over or snapping
Floppy, leggy growth usually means the soil is too rich. Heavy nitrogen pushes thin, top-heavy stems that lean and break, and skipping the early pinch makes it worse. Grow epazote in lean ground, hold back the feed, and pinch the tips young so the plant branches low and stands on its own.
Fix:
- Pinch back growing tips to encourage branching
- Reduce or stop fertilizing
- Stake or space plants to improve support and airflow
Holes and stippling chewed into the leaves
Chewed and speckled foliage points to leaf-feeding insects like flea beetles, the odd caterpillar, or aphids massed on the new growth. The strong scent keeps most pests off, so damage tends to stay light. Blast aphids off with a hard spray of water, pick the bigger pests by hand, and reach for insecticidal soap only if an infestation really takes hold.
Fix:
- Hose off aphids with a strong stream of water
- Hand-pick larger pests
- Use insecticidal soap if infestation is heavy
Toxicity
Epazote sits in an unusual spot: a kitchen herb for people, yet a plant to keep away from animals. In small culinary amounts the leaf is safe for people and has been used that way for generations, but in quantity its ascaridole turns toxic, and the distilled essential oil is genuinely poisonous. Treat the foliage as a caution for cats, dogs, horses, rabbits, livestock, and birds.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds
Safe for
People
Cats Caution
The aromatic foliage holds ascaridole, so a cat that grazes on it may drool, vomit, or go off its food. Keep the plant out of reach rather than counting on the strong smell to deter a curious cat.
Dogs Caution
A dog that chews the leaves can end up with an upset stomach and loose stools. Small nibbles rarely cause much, but a real mouthful warrants a call to the vet.
Horses Caution
Horses should not browse epazote, since the ascaridole in the leaves can churn the gut and leave them dull and off their feed. Fence it away from paddocks and grazing edges.
Rabbits Caution
Rabbits have small, sensitive systems, so even a little of the oily foliage can bring on digestive distress. Leave it off the menu and stick to safe greens.
Livestock Caution
Cattle, goats, and sheep that eat much of the plant risk stomach trouble from the same essential oil. Most stock avoid the pungent leaves on their own, but don't rely on that where forage is short.
Birds Caution
The concentrated ascaridole makes epazote a poor choice around pet birds and backyard poultry, where a small body weight turns a little into a lot. Keep it well clear of where birds feed.
People Culinary herb, in moderation
Used as a seasoning in small amounts the way Mexican cooks have for generations, epazote is safe to eat. The danger is dose: large quantities of leaf or, far worse, the distilled essential oil can poison, and pregnant women are advised to avoid it altogether.
Use only in small culinary amounts as a seasoning; never consume the concentrated essential oil. Pregnant women are advised to avoid epazote.
Helpline numbers
United States
ASPCA Animal Poison Control: (888) 426-4435 (fee applies)
United Kingdom
Animal PoisonLine: 01202 509000 (fee applies)
Australia
Animal Poisons Helpline: 1300 869 738
How to propagate
Epazote is one of the simpler herbs to start, and once it has a foothold it largely sows the next crop for you.
SeedEasy
Direct-sow after the last frost when soil is warm, or start indoors 6-8 weeks before last frost. · Germinates in roughly 1-2 weeks and establishes within several weeks; self-sows readily once established.
Epazote grows easily from seed. Sow it indoors 6 to 8 weeks before your last frost, or scatter it straight in the garden once the soil warms, pressing the tiny seeds onto the surface or barely covering them, since they need light to sprout. They come up in about 1 to 2 weeks and fill out over the next several, and once a plant settles in it self-sows so freely you rarely need to sow again.
Myths
Epazote is a harmless culinary herb you can eat freely in any amount.
A pinch of the leaf in a pot of beans is fine, and cooks have used it that way for generations. But the plant carries ascaridole, and large amounts or the distilled essential oil are genuinely poisonous. Pregnant women are advised to skip it entirely.
Epazote stays neatly where you plant it.
Left to flower, it scatters seed everywhere and turns weedy fast, sprouting well past the bed it started in. Cut the flower spikes before the seed sets if you want to keep it in bounds.