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PlantFiles: Silverleaf Sunflower
Helianthus argophyllus

Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Helianthus (hee-lee-AN-thus) (Info)
Species: argophyllus (ar-go-FIL-us) (Info)

One vendor has this plant for sale.

2 members have or want this plant for trade.


4-6 ft. (1.2-1.8 m)

15-18 in. (38-45 cm)
18-24 in. (45-60 cm)

Not Applicable

Sun Exposure:
Full Sun

Unknown - Tell us

Bloom Color:
Gold (Yellow-Orange)

Bloom Time:
Mid Summer
Late Summer/Early Fall
Mid Fall


Other details:
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information:

Propagation Methods:
Unknown - Tell us

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds
Properly cleaned, seed can be successfully stored

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to view:

By AnniesAnnuals
Thumbnail #1 of Helianthus argophyllus by AnniesAnnuals

By WeedsWorth_com
Thumbnail #2 of Helianthus argophyllus by WeedsWorth_com

By PurplePansies
Thumbnail #3 of Helianthus argophyllus by PurplePansies

By WeedsWorth_com
Thumbnail #4 of Helianthus argophyllus by WeedsWorth_com


1 positive
No neutrals
No negatives

Gardeners' Notes:

Positive btc129psu On Nov 11, 2008, btc129psu from Houston, TX (Zone 9a) wrote:

This sunflower has proven to be a very hardy addition to my garden. I had planted a few seeds in a 4" black seedling pot late in the season and before I had a chance to plant them in the ground or a bigger pot I had to travel abroad from about May to early August. They sat in the tiny black pot for over 3 months throughout the peak of summer with virtualy no care. Although they were long, stringy and stunted looking when I returned in early fall, I potted them in a large pot and they began to thrive. It is now the second week of November and despite a hurricane and cooling temperatures they have just begun to flower prolifically. Their foliage has been quite attractive as they grew and now their flowers are an eye catching addition to my garden at this transitory period between growing seasons. While I wouldn't suggest treating them like this in the future, this certainly attests to their hardiness and adaptability.


This plant has been said to grow in the following regions:

Freeport, Texas
Houston, Texas
Matagorda, Texas
Sweeny, Texas

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