Astragalus loanus Plant Care

Astragalus loanus Barneby

Updated · Sources · How we source care data

Astragalus loanus is a rare species of flowering plant in the legume family known by the common name Glenwood milkvetch. It is endemic to Utah in the United States, where it occurs only in Sevier County.

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Water

Every 7–10 days

Light

Full sun to partial shade

Temp

60–80°F

Humidity

40–60%

At a glance

How do you care for Astragalus loanus?

Plant Astragalus loanus in full sun to partial shade (USDA zones 13a) and water a young shrub every 7–10 days until it is established. It tolerates temperatures of 60–80°F (16–27°C). Fertilize it every 8 months during the growing season.

Where Is the Astragalus loanus Native To?

Native range1 country

What Is the Astragalus loanus?

Astragalus loanus (Astragalus loanus) belongs to the Fabaceae family within the Astragalus genus. Astragalus loanus is native to Utah in the United States.

Astragalus loanus displays a low spreading ground cover growth habit, reaching up to 0.5 ft tall with a spread of approximately 2 ft. Astragalus loanus produces small pea-like flowers in shades of purple, pink, or white.

Leaf size: approximately 1 inches.

How Often Should You Water a Astragalus loanus?

Water a young or newly planted Astragalus loanus every 7–10 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 7–10 days

Until established; then in dry spells

What Light Does the Astragalus loanus Need?

Astragalus loanus thrives in full sun to partial shade.

Light Requirement

Full sun to partial shade

What Temperature and Humidity Does the Astragalus loanus Prefer?

Astragalus loanus tolerates temperatures of 60–80°F. Astragalus loanus prefers humidity levels of 40–60%.

Temperature

60–80°F

Humidity

40–60%

What Soil Mix Works Best for a Astragalus loanus?

Well-draining sandy soil mix with added perlite for extra drainage. Good drainage is essential for Astragalus loanus to prevent waterlogging, which leads to root rot and fungal issues.

How Often Should You Fertilize a Astragalus loanus?

Feed Astragalus loanus every 8 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 8 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 Astragalus loanus?

Choose a spot with full sun to partial shade and well-draining sandy soil mix with added perlite for extra drainage. Avoid low spots where water collects after rain.

Astragalus loanus is suited to USDA Zone 13a.

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 Astragalus loanus?

Astragalus loanus can spread to about 2 ft (0.6 m) and reach about 1 ft (0 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 Astragalus loanus?

Prune Astragalus loanus 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 Astragalus loanus in Winter?

Astragalus loanus 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 Astragalus loanus?

Astragalus loanus can be propagated through seeds, division of root ball. Similar propagation techniques also apply to aragallus acutirostris plant care, which shares the same genus.

Is the Astragalus loanus Toxic to Pets and Children?

Pet safety not verified

The ASPCA does not list Astragalus loanus, 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 Astragalus loanus?

Astragalus loanus is susceptible to aphids, spider mites, leafhoppers. 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 Astragalus loanus Need?

Astragalus loanus grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. Astragalus loanus is native to Utah in the United States. In cooler regions, grow Astragalus loanus as a houseplant or bring it indoors before the first frost.

Hardiness Zone

Zone 13a

Keep exploring plants

Astragalus loanus 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 Astragalus genus — compare its care with other Astragalus species on PlantoScan.

Astragalus is part of the Fabaceae plant family — browse all Fabaceae genera and species.

Astragalus loanus thrives in bright light and direct sun — see other bright-light plants.

More Astragalus Species

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

Sources

  • Scientific name & taxonomy: Astragalus loanus Barneby, family Fabaceae (first published in Mem. New York Bot. Gard. 13(2): 662 (1964)) — World Flora Online record, IPNI name record.
  • Pet toxicity: Pet safety not verified: the ASPCA does not list Astragalus loanus, 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 13a, 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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