Desert Crossosoma Plant Care

Crossosoma bigelovii S.Watson

Updated · Sources · How we source care data

Crossosoma bigelovii, known by the common name ragged rockflower, is one of only a few species in the flowering plant family Crossosomataceae.

Water

Every 7–10 days

Light

Full sun to partial shade

Temp

50–85°F

Humidity

40–70%

At a glance

How do you care for Desert Crossosoma?

Plant Desert Crossosoma in full sun to partial shade (USDA zones 12a) and water a young shrub every 7–10 days until it is established. It tolerates temperatures of 50–85°F (10–29°C). Fertilize it every 6 months during the growing season.

What Is the Desert Crossosoma?

Desert Crossosoma (Crossosoma bigelovii) belongs to the Crossosomataceae family within the Crossosoma genus.

Desert Crossosoma displays a low, spreading shrub growth habit, reaching up to 2.5 ft tall with a spread of approximately 3 ft. Desert Crossosoma produces small white flowers in clusters.

Leaf size: approximately 2 inches.

How Often Should You Water a Desert Crossosoma?

Water a young or newly planted Desert Crossosoma 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 Desert Crossosoma Need?

Desert Crossosoma thrives in full sun to partial shade.

Light Requirement

Full sun to partial shade

What Temperature and Humidity Does the Desert Crossosoma Prefer?

Crossosoma bigelovii tolerates temperatures of 50–85°F. Desert Crossosoma prefers humidity levels of 40–70%.

Temperature

50–85°F

Humidity

40–70%

What Soil Mix Works Best for a Desert Crossosoma?

Well-draining sandy soil with high organic content. Good drainage is essential for Desert Crossosoma to prevent waterlogging, which leads to root rot and fungal issues.

How Often Should You Fertilize a Desert Crossosoma?

Feed Desert Crossosoma 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 Desert Crossosoma?

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

Desert Crossosoma is suited to USDA Zone 12a.

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 Desert Crossosoma?

Desert Crossosoma can spread to about 3 ft (0.9 m) and reach about 3 ft (1 m) tall. Space plants about 3 ft (0.9 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 Desert Crossosoma?

Prune Desert Crossosoma 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 Desert Crossosoma in Winter?

Desert Crossosoma is frost-tender (hardy to USDA zone 12). 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 Desert Crossosoma?

Desert Crossosoma can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to california crossosoma plant care, which shares the same genus.

Is the Desert Crossosoma Toxic to Pets and Children?

Pet safety not verified

The ASPCA does not list Desert Crossosoma, 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 Desert Crossosoma?

Desert Crossosoma is susceptible to aphids, spider mites. 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 Desert Crossosoma Need?

Desert Crossosoma grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. In cooler regions, grow Desert Crossosoma as a houseplant or bring it indoors before the first frost.

Hardiness Zone

Zone 12a

Keep exploring plants

Desert Crossosoma 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 Crossosoma genus — compare its care with other Crossosoma species on PlantoScan.

Crossosoma is part of the Crossosomataceae plant family — browse all Crossosomataceae genera and species.

Desert Crossosoma thrives in bright light and direct sun — see other bright-light plants.

Related Plant Care Guides

Closely related plants with similar care requirements:

Sources

  • Scientific name & taxonomy: Crossosoma bigelovii S.Watson, family Crossosomataceae (first published in Proc. Amer. Acad. Arts 11: 122 (1876)) — World Flora Online record, IPNI name record.
  • Pet toxicity: Pet safety not verified: the ASPCA does not list Desert Crossosoma, 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 12a, 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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