Astragalus oocarpus Plant Care
Astragalus oocarpus A.Gray
Updated · Sources · How we source care data
Astragalus oocarpus is a rare species of milkvetch known by the common names San Diego milkvetch and Descanso milkvetch.
Every 7–10 days
Full sun to partial shade
60–80°F
40–60%
At a glance
How do you care for Astragalus oocarpus?
Plant Astragalus oocarpus 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.
What Is the Astragalus oocarpus?
Astragalus oocarpus (Astragalus oocarpus) belongs to the Fabaceae family within the Astragalus genus.
Astragalus oocarpus displays a low spreading ground cover growth habit, reaching up to 0.5 ft tall with a spread of approximately 2 ft. Astragalus oocarpus produces small pea-like flowers in shades of purple, pink, or white.
Leaf size: approximately 1 inches.
How Often Should You Water a Astragalus oocarpus?
Water a young or newly planted Astragalus oocarpus 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 oocarpus Need?
Astragalus oocarpus thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Astragalus oocarpus Prefer?
Astragalus oocarpus tolerates temperatures of 60–80°F. Astragalus oocarpus prefers humidity levels of 40–60%.
Temperature
60–80°F
Humidity
40–60%
What Soil Mix Works Best for a Astragalus oocarpus?
Well-draining sandy soil mix with added perlite for extra drainage. Good drainage is essential for Astragalus oocarpus to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Astragalus oocarpus?
Feed Astragalus oocarpus 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 oocarpus?
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 oocarpus 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 oocarpus?
Astragalus oocarpus 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 oocarpus?
Prune Astragalus oocarpus 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 oocarpus in Winter?
Astragalus oocarpus 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 oocarpus?
Astragalus oocarpus 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 oocarpus Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Astragalus oocarpus, 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 oocarpus?
Astragalus oocarpus 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 oocarpus Need?
Astragalus oocarpus grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. In cooler regions, grow Astragalus oocarpus as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13a
Keep exploring plants
Astragalus oocarpus 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 oocarpus 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 oocarpus A.Gray, family Fabaceae — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Astragalus oocarpus, 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.
