Fertilising guide
How to fertilise Epazote (Dysphania ambrosioides)— schedule & NPK
Also called Mexican Tea, Wormseed.
More about epazote
About Epazote
Dysphania ambrosioides · also called Mexican Tea, Wormseed · herb
Epazote is a pungent, resinous annual or short-lived perennial herb essential to Mexican cooking, especially with beans, where it adds flavour and is said to reduce gassiness. A tough, sun-loving plant of warm climates, it tolerates poor dry soil and grows tall and weedy. Its potent essential oil makes it medicinal and toxic in concentrated form.
Growth habit: Erect, branching annual or short-lived perennial with a strong central stem and toothed, lance-shaped leaves. Vigorous and weedy, it self-seeds prolifically and can naturalise aggressively if flower spikes are not removed.
What fertiliser epazote actually wants — and why
Epazote is a lean, aromatic herb — the essential-oil flavour you grow it for is strongest in poor soil, so feeding it actively makes it worse.
Little or nothing. If anything, a very weak balanced feed or a thin compost top-dress — never a rich nitrogen feed, which dilutes the aromatic oils and produces soft, bland, floppy growth.
For the language behind the three numbers on the bottle — what nitrogen, phosphorus and potassium each do — see the NPK ratio explained entry. The short version for epazote: match the feed to the job the plant is doing right now, not to a generic “plant food” on the shelf.
How often to feed epazote, and which months
Feeding only earns its keep while the plant is in active growth and can use the nutrients — pour feed into a dormant or low-light plant and it simply builds up as root-burning salt. For epazote:
Needs little feeding and thrives on lean soil. Skip rich fertilisers; an occasional light compost top-dress is plenty. Over-fertilising produces rank, soft growth with diluted aroma and flavour, the opposite of what you want from this pungent herb. In practice: a spring compost top-dress at most, and otherwise leave epazote unfed — lean, sharp-draining soil is exactly what concentrates its flavour.
The dormant-season rule matters more than the exact interval: skip feeding entirely when epazote is resting. For the wider context on indoor feeding rhythms across the seasons, the houseplant fertiliser schedule walks through the year month by month.
What strength to mix for epazote
As weak as it gets for epazote, or none at all. The flavour-versus-growth trade-off runs the opposite way to leafy crops: restraint is the technique.
Feeding always goes onto already-damp soil, never dry roots — water epazote first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the epazote watering schedule.
Signs you are over-feeding epazote
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for epazote:
- Lush, soft, fast growth with noticeably weaker scent and flavour.
- Floppy stems, sparse essential oils, and poor cold/wet hardiness.
- Salt crust in containers and scorched leaf tips from over-feeding.
Signs you are under-feeding epazote
- Rare — these herbs thrive on lean soil.
- Only on truly exhausted soil: pale, thin, very slow growth.
- A short-lived, weak plant in a long-spent container.
If the symptoms point at watering, light or roots rather than nutrition, the full epazote care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Over-feeding is so unlikely with epazote that flushing is rarely needed; if a container has had feed, a single plain-water flush and a switch to a leaner, grittier mix resets it.
Organic vs synthetic feeds for epazote
Organic options
A thin spring mulch of garden compost or leaf-mould is the most these want. UK: a little garden compost; US: a light Espoma Garden-tone top-dress at most. Lean and gritty beats fed and rich every time.
Synthetic / liquid feeds
Generally none for epazote. At absolute most, a very dilute balanced feed once or twice in a container; in the ground, nothing — synthetic feeds work directly against the flavour.
Brand names are examples, not endorsements, and UK and US ranges differ — check the label’s own NPK and dilution rate, since formulations change.
Fertilising epazote — frequently asked questions
What fertiliser does epazote need?
Little or nothing. If anything, a very weak balanced feed or a thin compost top-dress — never a rich nitrogen feed, which dilutes the aromatic oils and produces soft, bland, floppy growth. Epazote is a lean, aromatic herb — the essential-oil flavour you grow it for is strongest in poor soil, so feeding it actively makes it worse.
How often should I feed epazote?
Needs little feeding and thrives on lean soil. Skip rich fertilisers; an occasional light compost top-dress is plenty. Over-fertilising produces rank, soft growth with diluted aroma and flavour, the opposite of what you want from this pungent herb. Needs little feeding and thrives on lean soil. Skip rich fertilisers; an occasional light compost top-dress is plenty. Over-fertilising produces rank, soft growth with diluted aroma and flavour, the opposite of what you want from this pungent herb. In practice: a spring compost top-dress at most, and otherwise leave epazote unfed — lean, sharp-draining soil is exactly what concentrates its flavour.
What strength of feed for epazote?
As weak as it gets for epazote, or none at all. The flavour-versus-growth trade-off runs the opposite way to leafy crops: restraint is the technique.
What does over-feeding epazote look like?
Lush, soft, fast growth with noticeably weaker scent and flavour. Floppy stems, sparse essential oils, and poor cold/wet hardiness. Salt crust in containers and scorched leaf tips from over-feeding. Feeding epazote like a leafy vegetable is the defining mistake — rich nitrogen gives you a big, soft, fast plant whose leaves are watery and bland, with weak winter-rot resistance.
Should I flush the soil of epazote?
Over-feeding is so unlikely with epazote that flushing is rarely needed; if a container has had feed, a single plain-water flush and a switch to a leaner, grittier mix resets it.
Keep reading
- Epazote care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water epazote — the watering schedule
- The houseplant fertiliser schedule — feeding through the year
- NPK ratio explained — what the three numbers on the bottle mean
- How to fertilise basil
- How to fertilise herb garden
- How to fertilise mint
- All 1284 fertilising guides in the Growli library