Iva hayesiana Plant Care

Iva hayesiana A.Gray

Updated · Sources · How we source care data

Iva hayesiana is a species of flowering plant in the family Asteraceae known by the common names San Diego marsh-elder and San Diego povertyweed.

🌱Herbs🌼Perennials🌻Annuals
Water

Every 7–14 days

Light

Full sun to partial shade

Temp

65–85°F

Humidity

40–60%

At a glance

How do you care for Iva hayesiana?

Plant Iva hayesiana in full sun to partial shade (USDA zones 13b) and water a young shrub every 7–14 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 Iva hayesiana?

Iva hayesiana (Iva hayesiana) belongs to the Asteraceae family within the Iva genus.

Iva hayesiana displays an upright, branching shrub growth habit, reaching up to 3 ft tall with a spread of approximately 2 ft. Iva hayesiana produces small, inconspicuous greenish-white flowers in clusters.

Leaf size: approximately 4 inches.

How Often Should You Water a Iva hayesiana?

Water a young or newly planted Iva hayesiana every 7–14 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established shrubs mainly need water during long dry spells. In a container, water whenever the top few centimetres of soil are dry.

Watering Frequency

Every 7–14 days

Until established; then in dry spells

What Light Does the Iva hayesiana Need?

Iva hayesiana thrives in full sun to partial shade.

Light Requirement

Full sun to partial shade

What Temperature and Humidity Does the Iva hayesiana Prefer?

Iva hayesiana tolerates temperatures of 65–85°F. Iva hayesiana prefers humidity levels of 40–60%.

Temperature

65–85°F

Humidity

40–60%

What Soil Mix Works Best for a Iva hayesiana?

Well-draining sandy loam with added organic matter. Good drainage is essential for Iva hayesiana to prevent waterlogging, which leads to root rot and fungal issues.

How Often Should You Fertilize a Iva hayesiana?

Feed Iva hayesiana every 6 months during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established shrubs 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 Iva hayesiana?

Choose a spot with full sun to partial shade and well-draining sandy loam with added organic matter. Avoid low spots where water collects after rain.

Iva hayesiana is suited to USDA Zone 13b.

Plant container-grown or balled-and-burlapped shrubs in spring or early autumn, setting the root flare at soil level, and water well after planting.

How Far Apart Should You Plant a Iva hayesiana?

Iva hayesiana can spread to about 2 ft (0.6 m) and reach about 3 ft (1 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 plant spacing calculator.

How Do You Prune a Iva hayesiana?

Prune Iva hayesiana 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 shrub in one year.

How Do You Care for a Iva hayesiana in Winter?

Iva hayesiana 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 Iva hayesiana?

Iva hayesiana can be propagated through seeds, division of root ball. Similar propagation techniques also apply to annual sumpweed plant care, which shares the same genus.

Is the Iva hayesiana Toxic to Pets and Children?

Pet safety not verified

The ASPCA does not list Iva hayesiana, 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 Iva hayesiana?

Iva hayesiana is susceptible to aphids, spider mites, whiteflies. 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 Iva hayesiana Need?

Iva hayesiana grows outdoors in USDA Zone 13b. It survives winters down to planting zone 13b. In cooler regions, grow Iva hayesiana as a houseplant or bring it indoors before the first frost.

Hardiness Zone

Zone 13b

Keep exploring plants

Iva hayesiana 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 Iva genus — compare its care with other Iva species on PlantoScan.

Iva is part of the Asteraceae plant family — browse all Asteraceae genera and species.

Iva hayesiana thrives in bright light and direct sun — see other bright-light plants.

More Iva Species

Other Iva species in PlantoScan's care catalogue share similar watering, light, and soil preferences:

Sources

  • Scientific name & taxonomy: Iva hayesiana A.Gray, family Asteraceae (first published in Proc. Amer. Acad. Arts xi. (1876) 78.) — World Flora Online record, IPNI name record.
  • Pet toxicity: Pet safety not verified: the ASPCA does not list Iva hayesiana, 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.
  • 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.

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