Photo: Stephen Laymon, Bureau of Land ManagementPublic domainvia Wikimedia Commons
Manual of the Botany of the Region of San Francisco Bay Plant Care
Centromadia pungens Greene
Updated · Sources · How we source care data
Centromadia pungens, the common spikeweed or common tarweed, is a species of North American plants in the tribe Madieae within the family Asteraceae. It is native to northern Baja California and the western United States (California, Oregon, Washington, Idaho, Nevada, Arizona). The plant is considered a noxious weed in parts of the Pacific Northwest.
Every 7–10 days
Full sun to partial shade
50–80°F
40–70%
At a glance
How do you care for Manual of the Botany of the Region of San Francisco Bay?
Water Manual of the Botany of the Region of San Francisco Bay every 7–10 days, letting the top layer of soil dry out between waterings, and give it full sun to partial shade. It prefers temperatures of 50–80°F (10–27°C) and 40–70% humidity. Fertilize it every 6 months during the growing season.
Where Is the Manual of the Botany of the Region of San Francisco Bay Native To?
What Is the Manual of the Botany of the Region of San Francisco Bay?
Manual of the Botany of the Region of San Francisco Bay (Centromadia pungens) belongs to the Asteraceae family within the Centromadia genus. Manual of the Botany of the Region of San Francisco Bay is native to northern Baja California and the western United States.
Manual of the Botany of the Region of San Francisco Bay displays an upright, branching perennial growth habit, reaching up to 2 ft tall with a spread of approximately 1.5 ft. Manual of the Botany of the Region of San Francisco Bay produces daisy-like flowers in shades of yellow, orange, or red.
Leaf size: approximately 4 inches.
How Often Should You Water a Manual of the Botany of the Region of San Francisco Bay?
Centromadia pungens requires watering every 7–10 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 7–10 days
Let soil partially dry between waterings
What Light Does the Manual of the Botany of the Region of San Francisco Bay Need?
Manual of the Botany of the Region of San Francisco Bay thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Manual of the Botany of the Region of San Francisco Bay Prefer?
Centromadia pungens grows best at temperatures of 50–80°F. Manual of the Botany of the Region of San Francisco Bay prefers humidity levels of 40–70%.
Temperature
50–80°F
Humidity
40–70%
What Soil Mix Works Best for a Manual of the Botany of the Region of San Francisco Bay?
Well-draining sandy loam with added organic matter for moisture retention. Good drainage is essential for Manual of the Botany of the Region of San Francisco Bay to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Manual of the Botany of the Region of San Francisco Bay?
Feed Manual of the Botany of the Region of San Francisco Bay every 6 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every 6 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Manual of the Botany of the Region of San Francisco Bay?
Repot every 2-3 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Manual of the Botany of the Region of San Francisco Bay?
Manual of the Botany of the Region of San Francisco Bay can be propagated through seeds. Similar propagation techniques also apply to fitch's tarweed plant care, which shares the same genus.
Is the Manual of the Botany of the Region of San Francisco Bay Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Manual of the Botany of the Region of San Francisco Bay, 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 Manual of the Botany of the Region of San Francisco Bay?
Manual of the Botany of the Region of San Francisco Bay is susceptible to aphids, thrips, 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 Manual of the Botany of the Region of San Francisco Bay Need?
Manual of the Botany of the Region of San Francisco Bay grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Manual of the Botany of the Region of San Francisco Bay is native to northern Baja California and the western United States. In cooler regions, grow Manual of the Botany of the Region of San Francisco Bay as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Manual of the Botany of the Region of San Francisco Bay 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 Centromadia genus — compare its care with other Centromadia species on PlantoScan.
Centromadia is part of the Asteraceae plant family — browse all Asteraceae genera and species.
Manual of the Botany of the Region of San Francisco Bay 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: Centromadia pungens Greene, family Asteraceae (first published in Man. Bot. San Francisco : 196 (1894)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Manual of the Botany of the Region of San Francisco Bay, 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: Stephen Laymon, Bureau of Land Management, Public domain, Wikimedia Commons — original.
- 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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