Photo: vinicius_s_dominguesCC BY 4.0via iNaturalistresized / cropped
Yellow Seed Plant Care
Mecardonia procumbens (Mill.) Small
Updated · Sources · How we source care data
This plant is easily identified by its small, bright yellow flowers that cover its trailing stems. Originating from South America, Mecardonia procumbens is highly sought after by plant collectors for its vibrant color and ability to cascade over the edges of containers or hanging baskets.
Every 3–5 days
Full sun to partial shade
50–80°F
40–60%
At a glance
How do you care for Yellow Seed?
Plant Yellow Seed in full sun to partial shade (USDA zones 9a–11b) and water a young shrub every 3–5 days until it is established. It tolerates temperatures of 50–80°F (10–27°C). Fertilize it every 6 months during the growing season.
Where Is the Yellow Seed Native To?
What Is the Yellow Seed?
Yellow Seed (Mecardonia procumbens) belongs to the Plantaginaceae family within the Mecardonia genus. Yellow Seed is native to tropical and subtropical regions of the Americas. Yellow Seed is also known as Baby Jaws.
Yellow Seed displays a low spreading ground cover growth habit, reaching up to 0.5 ft tall with a spread of approximately 1.5 ft. Yellow Seed produces small yellow flowers with five petals.
Leaf size: approximately 1 inches.
How Often Should You Water a Yellow Seed?
Water a young or newly planted Yellow Seed every 3–5 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 3–5 days
Until established; then in dry spells
What Light Does the Yellow Seed Need?
Yellow Seed thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Yellow Seed Prefer?
Mecardonia procumbens tolerates temperatures of 50–80°F. Yellow Seed prefers humidity levels of 40–60%.
Temperature
50–80°F
Humidity
40–60%
What Soil Mix Works Best for a Yellow Seed?
Well-draining sandy loam with added organic matter. Good drainage is essential for Yellow Seed to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Yellow Seed?
Feed Yellow Seed 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 Yellow Seed?
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.
Yellow Seed is suited to USDA Zone 9a – 11b.
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 Yellow Seed?
Yellow Seed can spread to about 2 ft (0.5 m) and reach about 1 ft (0 m) tall. Space plants about 2 ft (0.5 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 Yellow Seed?
Prune Yellow Seed 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 Yellow Seed in Winter?
Yellow Seed is frost-tender (hardy to USDA zone 9). 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 Yellow Seed?
Yellow Seed can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to mecardonia acuminata plant care, which shares the same genus.
Is the Yellow Seed Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Yellow Seed, 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 Yellow Seed?
Yellow Seed 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 Yellow Seed Need?
Yellow Seed grows outdoors in USDA Zone 9a – 11b. It survives winters down to planting zone 9a. Yellow Seed is native to tropical and subtropical regions of the Americas. In cooler regions, grow Yellow Seed as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 9a – 11b
Keep exploring plants
Yellow Seed 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 Mecardonia genus — compare its care with other Mecardonia species on PlantoScan.
Mecardonia is part of the Plantaginaceae plant family — browse all Plantaginaceae genera and species.
Yellow Seed 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: Mecardonia procumbens (Mill.) Small, family Plantaginaceae (first published in Fl. S.E. U.S. : 1065 (1903)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Yellow Seed, 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.
- Photo: vinicius_s_domingues, CC BY 4.0, iNaturalist — original.
- Hardiness zone: USDA Zone 9a – 11b, estimated from the plant's typical growing conditions.
- 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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