
Photo: Matt Lavin from Bozeman, Montana, USACC BY-SA 2.0via Wikimedia Commonsresized / cropped
The Genera of North American Plants Plant Care
Helianthus pauciflorus Nutt.
Updated · Sources · How we source care data
Helianthus pauciflorus, called the stiff sunflower, is a North American plant species in the family Asteraceae. It is widespread across the Great Plains, the Rocky Mountains, and the Great Lakes region, and naturalized in scattered locations in the eastern United States and in much of southern Canada (from Alberta to Nova Scotia).
Every 7–10 days
Full sun
65–85°F
40–60%
At a glance
How do you care for The Genera of North American Plants?
Plant The Genera of North American Plants in full sun (USDA zones 13b) and water a young tree every 7–10 days until it is established. It tolerates temperatures of 65–85°F (18–29°C). Fertilize it every 6 months during the growing season.
What Is the The Genera of North American Plants?
The Genera of North American Plants (Helianthus pauciflorus) belongs to the Asteraceae family within the Helianthus genus.
The Genera of North American Plants displays a tall, upright stems with large flower heads growth habit, reaching up to 6 ft tall with a spread of approximately 2 ft. The Genera of North American Plants produces large, yellow, daisy-like flower heads.
Leaf size: approximately 6 inches.
How Often Should You Water a The Genera of North American Plants?
Water a young or newly planted The Genera of North American Plants every 7–10 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established trees mainly need water during long dry spells. In a container, water whenever the top few centimetres of soil are dry.
Watering Frequency
Every 7–10 days
Until established; then in dry spells
What Light Does the The Genera of North American Plants Need?
The Genera of North American Plants thrives in full sun.
Light Requirement
Full sun
What Temperature and Humidity Does the The Genera of North American Plants Prefer?
Helianthus pauciflorus tolerates temperatures of 65–85°F. The Genera of North American Plants prefers humidity levels of 40–60%.
Temperature
65–85°F
Humidity
40–60%
What Soil Mix Works Best for a The Genera of North American Plants?
Well-draining loamy soil with added compost for nutrients. Good drainage is essential for The Genera of North American Plants to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a The Genera of North American Plants?
Feed The Genera of North American Plants every 6 months during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established trees in good soil often need little extra feeding, so let weak growth or pale foliage guide you.
Stop feeding by late summer so new growth can harden before winter.
Fertilizing
Every 6 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
Where Should You Plant a The Genera of North American Plants?
Choose a spot with full sun and well-draining loamy soil with added compost for nutrients. Avoid low spots where water collects after rain.
The Genera of North American Plants is suited to USDA Zone 13b.
Plant container-grown or balled-and-burlapped trees in spring or early autumn, setting the root flare at soil level, and water well after planting.
How Far Apart Should You Plant a The Genera of North American Plants?
The Genera of North American Plants can spread to about 2 ft (0.6 m) and reach about 6 ft (2 m) tall. Space plants about 2 ft (0.6 m) apart so mature crowns don't crowd each other, and plant at least half that distance from buildings, fences and paths.
Planning a row or hedge? Try the tree spacing calculator.
How Do You Prune a The Genera of North American Plants?
Prune The Genera of North American Plants while it is dormant in late winter: first remove dead, damaged and crossing branches, then thin lightly for shape.
If it flowers in spring, prune right after flowering instead so you don't remove next year's buds. Never take off more than about a quarter of the tree in one year.
How Do You Care for a The Genera of North American Plants in Winter?
The Genera of North American Plants is frost-tender (hardy to USDA zone 13). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.
How Do You Propagate a The Genera of North American Plants?
The Genera of North American Plants can be propagated through seeds. Similar propagation techniques also apply to proceedings of the biological society of washington plant care, which shares the same genus.
Is the The Genera of North American Plants Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list The Genera of North American Plants, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the The Genera of North American Plants?
The Genera of North American Plants is susceptible to aphids, caterpillars, powdery mildew. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
What USDA Hardiness Zone Does the The Genera of North American Plants Need?
The Genera of North American Plants grows outdoors in USDA Zone 13b. It survives winters down to planting zone 13b. In cooler regions, grow The Genera of North American Plants as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13b
Keep exploring plants
The Genera of North American Plants is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Helianthus genus — compare its care with other Helianthus species on PlantoScan.
Helianthus is part of the Asteraceae plant family — browse all Asteraceae genera and species.
The Genera of North American Plants thrives in bright light and direct sun — see other bright-light plants.
More Helianthus Species
Other Helianthus species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Helianthus pauciflorus Nutt., family Asteraceae (first published in Gen. N. Amer. Pl. 2: 177 (1818)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list The Genera of North American Plants, so we can't confirm whether it is safe for cats and dogs. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Photo: Matt Lavin from Bozeman, Montana, USA, CC BY-SA 2.0, Wikimedia Commons — original.
- Hardiness zone: USDA Zone 13b, calculated from the plant's minimum temperature.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
