Skip to content
PlantSage.eu
ENRO
IIIFolio · plant profile№ A865medicinal · edible
Data provenancePermapeopleTreflePFAFPOWOeditorially reviewedreviewed 20 Oct 2026methodology → read
Home/Plants/Asteraceae

Showy Tarweed

Madia densifoliafam. Asteraceae
Educational content — not medical, botanical, or professional advice. Always consult a qualified clinician before using any herbal preparation — especially during pregnancy, breastfeeding, while on medication, or for children. How we source & review →
medicinaledibleannualannualedibleedible seedherbmedicinalnative am
Updated·Quick Q&A →
Garden journal pausedUse profile notes below
Madia densifolia (Showy Tarweed) — botanical photograph
Pl. A865 — Madia densifolia
Madia densifoliaMadia densifoliaMadia densifoliaMadia densifoliaMadia densifoliaMadia densifoliaMadia densifoliaMadia densifoliaMadia densifoliaMadia densifoliaMadia densifoliaMadia densifoliaMadia densifoliaMadia densifolia
I

Overview

Showy Tarweed, Madia densifolia, is an annual forb in the Asteraceae family, native to California and extending into Nevada, Oregon, and Washington, as well as Mexico's northwest region. This plant thrives in moist, light (sandy), medium, or heavy (clay) soil and prefers full sun exposure. Showy Tarweed can grow up to 0.8 meters tall and is known for its numerous small, golden-yellow flowers arranged densely on the plant, making it a notable ornamental addition to gardens. The seeds of Showy Tarweed are edible and can be eaten raw or roasted, often used as a snack or added to dishes for a nutty flavor. While primarily known for its edible seeds, this plant also has documented medicinal uses, though caution is advised when using it for any medicinal purposes. Showy Tarweed has been introduced into Italy, expanding its reach beyond its native range.

Quick answers

What is Showy Tarweed?

Showy Tarweed, Madia densifolia, is an annual forb in the Asteraceae family, native to California and extending into Nevada, Oregon, and Washington, as well as Mexico's northwest region. This plant thrives in moist, light (sandy), medium, or heavy (clay) soil and prefers full sun exposure.

Compare with:Aleutian ragwort→Aster glehnii→Aster hauptii→all comparisons →
IV·b

Mixology suggestions

1 draft
Editorial drafts. These pairings are AI-suggested from traditional herbal lore. Always verify with a qualified herbalist before brewing.
Showy Tarweed support blend
general
tea
AI returned a direct ingredient list; normalized into one draft blend for editorial review.
Growingconditions · propagation · uses
V

Cultivation

Showy Tarweed thrives in full sun and requires moist soil that can be light (sandy), medium, or heavy (clay). This annual forb/herb grows to about 0.8 meters tall and is native to regions including California, Mexico Northwest, Nevada, Oregon, and Washington. For propagation, sow seeds directly in the garden after all danger of frost has passed. The plant is hardy in temperate regions but may benefit from consistent moisture throughout its growing season.
Light
Full sun
Water
Moist
Soil
Light (sandy), Medium, Heavy (clay)
Life cycle
Annual
Habit
Forb/herb
Mature size
0.8 m tall
For first-time growers

How to grow Showy Tarweed for the first time

8steps

Start with Showy Tarweed as an easy-to-grow annual for a beginner gardener.

  1. 1

    What you'll need

    Seeds, small pots or direct planting area, water can or watering壶

  2. 2

    Best time to plant

    Plant in spring after the last frost when soil is warm.

  3. 3

    Soil and container prep

    Use well-draining soil with a mix of light (sandy), medium, or heavy clay. Ensure containers have drainage holes.

  4. 4

    Sowing or transplanting

    Direct sow seeds 1 cm deep in the garden bed or start them indoors 4 weeks before planting out.

  5. 5

    First two weeks

    Water regularly to keep soil moist but not waterlogged. Thin seedlings if they grow too close together.

  6. 6

    Ongoing care

    Provide full sun and regular watering, especially during dry spells. Monitor for pests like aphids.

  7. 7

    Harvest or pruning

    Prune dead flowers to encourage more blooms and maintain plant shape. Cut back after flowering if needed.

  8. 8

    Common mistakes

    Overwatering, planting in heavy shade, neglecting regular pruning, not providing enough sunlight, sowing too deep.

VI

Edible & utility

Edible parts:Seed
Edible uses: The seeds of Showy Tarweed (Madia densifolia) are edible and can be eaten raw or roasted. They are often collected from the plant when ripe and used as a snack or added to dishes for a nutty flavor.
Contextrange · companions · related
VII

Distribution

5 native · 1 introduced
Distribution across1 continent· 5 native· 1 introduced
Europe1 region
introduced (1)Italy
Broader regions
native:California, Mexico Northwest, Nevada, Oregon, Washington
IX

Specimen gallery

1 image
Madia densifolia (Showy Tarweed) — botanical photograph
Showy Tarweed (Madia densifolia)
X

See also

8 related
XI

Explore further

XII

About this entry

Last updated
Citation
How to cite this entry · Submit a correction
Back to the cataloguePlant id · a865befc-a56f-483a-abdb-a49f3005abd0
Decision aid
Choosing between Showy Tarweed and something else?
Compare with another plant

Continue reading

❦❦❦❦
Endpaper · archive updates

Get archive updates

Occasional email when substantial new content lands — plant profiles, seasonal growing notes, folk-remedy additions. Free, no tracking, unsubscribe anytime.

Newsletter returning soon.
We are rebuilding the update list around a lightweight editorial workflow. New dispatches will resume after the next content review cycle.
iCare notes