Silverleaf Sunflower
Helianthus argophyllus
Bois, D.; Frederick Warne (Firm); Herincq, B.; Step, Edward; Watson, William
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Asteraceae
- Genus:
- Helianthus
- Species:
- Helianthus argophyllus
Growth Characteristics
- Life Cycle:
- Annual
- Growth Habit:
- Forb/herb
- Height:
- 8-12 ft
- Light Requirements:
- Full Sun
- Drought Tolerance:
- High
- Bloom Months:
- aug, sep, oct, nov
- Bloom Colors:
- Yellow
Native Range
United States: Florida, North Carolina, Texas
Keystone Species Ranking
- Caterpillar Keystone:
- ★★☆☆☆ Based on number of butterfly and moth species using this genus as host plant (Source: National Wildlife Federation)
- Bee Keystone:
- ★☆☆☆☆ Based on number of native bee species using this genus for pollen and nectar (Source: National Wildlife Federation)
Host Plant for Caterpillars
Bordered Patch (Chlosyne lacinia), Charidryas gorgone, Painted Lady (Vanessa cardui)
Soil Requirements
- Soil Type:
- sandy, well-drained, nutrient-poor soil
- pH:
- 6.0 - 7.5 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
- Notes:
- native to coastal areas with sandy soils