Common Sunflower
Helianthus annuus
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Pl. A676 — Helianthus annuus
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IOverview
Overview
Common Sunflower (Helianthus annuus) is an annual forb or herb native to the southwestern United States and northwestern Mexico. This plant thrives in a variety of habitats across Arizona, California, Nevada, and several regions of Mexico. Known for its edible parts—flowers, seeds, and stems—common sunflower is both ornamental and useful as a food source. It prefers well-drained soils that are light (sandy), medium, or heavy (clay) with a pH range of 5.5 to 7.8. Common sunflower can grow up to 3 meters tall and is adaptable to dry to moist conditions, making it a versatile addition to gardens and landscapes in hardiness zones 6-9.
Quick answers
What is Common Sunflower?
Common Sunflower (Helianthus annuus) is an annual forb or herb native to the southwestern United States and northwestern Mexico. This plant thrives in a variety of habitats across Arizona, California, Nevada, and several regions of Mexico.
What is Common Sunflower used for?
Traditionally used for immune support. Each claim is evidence-rated — see Section II for full citations.
Best for
Top 1 evidence-ranked use of Common Sunflower
Clinicaluses · safety · chemistry · dosagemedicinal profile
IIBenefits & evidence
1 claim · 0 sources
Benefits & evidence
1 claim · 0 sources- Common Sunflower seeds have been traditionally used in Native American medicine to support immune health, often prepared as a decoction. The seeds contain high levels of vitamin E and zinc which may help bolster the body's defenses.
The presence of vitamin E and zinc in sunflower seeds supports antioxidant activity and enhances immune function by promoting T-cell proliferation and cytokine production.
IV·bMixology suggestions
1 draft
Mixology suggestions
1 draftEditorial drafts. These pairings are AI-suggested from traditional herbal lore. Always verify with a qualified herbalist before brewing.
Common Sunflower support blend
generaltea
AI returned a direct ingredient list; normalized into one draft blend for editorial review.
Growingconditions · propagation · uses
VCultivation
Cultivation
Common Sunflower thrives in full sun and prefers well-draining to moist soils with a pH between 5.5 and 7.8. It is hardy in temperate regions from zones 6-9 and can grow up to 3 meters tall. This annual plant performs best in light (sandy), medium, or heavy (clay) soil types. For optimal growth, ensure the soil remains consistently moist but not waterlogged. Propagate through seeds sown directly in the garden after the last frost. Harvest flowers, stems, and seeds for culinary use.
Light
8/10
Water
Dry, Moist
Soil
Light (sandy), Medium, Heavy (clay)
Hardiness
6-9
Life cycle
Annual
Habit
Forb/herb
Mature size
3.0 m tall
Soil pH
5.5–7.8
For first-time growers
How to grow Common Sunflower for the first time
7steps
Start with easy-to-grow Common Sunflowers for a rewarding beginner gardening experience.
- 1
What you'll need
Sunflower seeds, garden soil or containers, water.
- 2
Best time to plant
Plant in spring after the last frost, when temperatures are warm.
- 3
Soil and container prep
Use well-draining soil with a pH between 5.5 and 7.8. Ensure containers are at least 30 cm deep.
- 4
Sowing or transplanting
Direct sow seeds 2-3 cm deep, spacing them about 30 cm apart. Thin to the strongest plants if needed.
- 5
First two weeks
Water regularly to keep soil moist but not waterlogged. Monitor for pests and diseases.
- 6
Ongoing care
Provide full sun, at least 6 hours daily. Water deeply once a week, adjusting based on rainfall. Stake tall plants if needed.
- 7
Harvest or pruning
Prune dead flowers to encourage more blooms and remove any yellowing leaves for better air circulation.
VIEdible & utility
Edible & utility
Edible parts:FlowersSeedStem
Edible uses: Oil, Coffee
Other uses:Blotting paperDyeFiberFire starterCover cropHerbicideMicroscopeoiltextilesDynamic accumulator
Contextrange · companions · related
VIIDistribution
7 native · 23 introduced
Distribution
7 native · 23 introducedDistribution across4 continents· 7 native· 23 introduced
Europe7 regions
introduced (7)AlbaniaAustriaBelarusBelgiumBulgariaPortugalRussia
Asia2 regions
introduced (2)BangladeshIndia
Americas3 regions
introduced (3)BelizeBoliviaUnited States
Africa1 region
introduced (1)Botswana
Broader regions
native:Arizona, Mexico Southwest, Mexico Northwest, California, Mexico Central, Mexico Northeast, Nevada
introduced:Argentina South, Argentina Northwest, Alberta, British Columbia, Baltic States, Amur, Buryatiya, Arkansas, Altay, Chile Central
VIIIGarden companions
3 pairs
Garden companions
3 pairsPlant near these
These plants help — by repelling pests, fixing nitrogen, attracting pollinators, or sharing space well.
Keep away from these
Avoid planting nearby — competition, allelopathy, or shared pests/diseases.
IXSpecimen gallery
1 image
Specimen gallery
1 imageXSee also
8 related
See also
8 relatedPlants you might compare or use together — scored by shared family, common use cases, and growing requirements.
shared use cases
Different families, similar therapeutic role — good for comparing.
XI
Explore further
Companion planting
Compare with similar plants
Growing zone
XII
About this entry
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