Dodecahema leptoceras Plant Care
Dodecahema leptoceras (A.Gray) Reveal & Hardham
Updated · Sources · How we source care data
Dodecahema is a genus of plants in the family Polygonaceae with a single species restricted to California, where it is an endangered species on the state and federal levels. Its common name is slender-horned spineflower.
Every 7–14 days
Bright indirect light
60–75°F
40–60%
At a glance
How do you care for Dodecahema leptoceras?
Plant Dodecahema leptoceras in bright indirect light (USDA zones 13a) and water a young shrub every 7–14 days until it is established. It tolerates temperatures of 60–75°F (16–24°C). Fertilize it every 6 months during the growing season.
What Is the Dodecahema leptoceras?
Dodecahema leptoceras (Dodecahema leptoceras) belongs to the Polygonaceae family within the Dodecahema genus.
Dodecahema leptoceras displays a low rosette, clumping growth habit, reaching up to 0.5 ft tall with a spread of approximately 0.5 ft. Dodecahema leptoceras produces small clusters of tiny white or pink flowers.
Leaf size: approximately 3 inches.
How Often Should You Water a Dodecahema leptoceras?
Water a young or newly planted Dodecahema leptoceras 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 Dodecahema leptoceras Need?
Dodecahema leptoceras thrives in bright indirect light. Avoid placing Dodecahema leptoceras in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Bright indirect light
What Temperature and Humidity Does the Dodecahema leptoceras Prefer?
Dodecahema leptoceras tolerates temperatures of 60–75°F. Dodecahema leptoceras prefers humidity levels of 40–60%.
Temperature
60–75°F
Humidity
40–60%
What Soil Mix Works Best for a Dodecahema leptoceras?
Well-draining sandy soil with added organic matter for nutrients. Good drainage is essential for Dodecahema leptoceras to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Dodecahema leptoceras?
Feed Dodecahema leptoceras 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 Dodecahema leptoceras?
Choose a spot with bright indirect light and well-draining sandy soil with added organic matter for nutrients. Avoid low spots where water collects after rain.
Dodecahema leptoceras 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 Dodecahema leptoceras?
Dodecahema leptoceras can spread to about 1 ft (0.2 m) and reach about 1 ft (0 m) tall. Space plants about 1 ft (0.2 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 Dodecahema leptoceras?
Prune Dodecahema leptoceras 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 Dodecahema leptoceras in Winter?
Dodecahema leptoceras 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 Dodecahema leptoceras?
Dodecahema leptoceras can be propagated through seeds, division of offsets.
Is the Dodecahema leptoceras Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Dodecahema leptoceras, 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 Dodecahema leptoceras?
Dodecahema leptoceras is susceptible to aphids, spider mites, leaf miners. 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 Dodecahema leptoceras Need?
Dodecahema leptoceras grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. In cooler regions, grow Dodecahema leptoceras as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13a
Keep exploring plants
Dodecahema leptoceras 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 Dodecahema genus — compare its care with other Dodecahema species on PlantoScan.
Dodecahema is part of the Polygonaceae plant family — browse all Polygonaceae genera and species.
Dodecahema leptoceras 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: Dodecahema leptoceras (A.Gray) Reveal & Hardham, family Polygonaceae (first published in Phytologia 66(2): 87. 1989) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Dodecahema leptoceras, 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.
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