Photo: Alan RockefellerCC BY 4.0via iNaturalistresized / cropped
Coast Live Oak Plant Care
Quercus agrifolia Née
Updated · Sources · How we source care data
Quercus agrifolia, the California live oak, or coast live oak, is an evergreen live oak native to the California Floristic Province. Live oaks are so-called because they keep living leaves on the tree all year, adding young leaves and shedding dead leaves simultaneously rather than dropping dead leaves en masse in the autumn like a true deciduous tree.
Every 7–14 days
Full sun
0–100°F
30–70%
At a glance
How do you care for Coast Live Oak?
Plant Coast Live Oak in full sun (USDA zones 7a–10b) and water a young tree every 7–14 days until it is established. It tolerates temperatures of 0–100°F (-18–38°C).
Where Is the Coast Live Oak Native To?
What Is the Coast Live Oak?
Coast Live Oak (Quercus agrifolia) belongs to the Fagaceae family within the Quercus genus. Coast Live Oak is native to the California Floristic Province. Coast Live Oak is also known as California Live Oak.
Coast Live Oak displays a large deciduous tree growth habit, reaching up to 80 ft tall with a spread of approximately 60 ft. Coast Live Oak produces inconspicuous catkins.
Leaf size: approximately 6 inches.
How Often Should You Water a Coast Live Oak?
Water a young or newly planted Coast Live Oak every 7–14 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established trees 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 Coast Live Oak Need?
Coast Live Oak thrives in full sun.
Light Requirement
Full sun
What Temperature and Humidity Does the Coast Live Oak Prefer?
Quercus agrifolia tolerates temperatures of 0–100°F. Coast Live Oak prefers humidity levels of 30–70%.
Temperature
0–100°F
Humidity
30–70%
What Soil Mix Works Best for a Coast Live Oak?
Well-draining loamy soil with good organic content. Good drainage is essential for Coast Live Oak to prevent waterlogging, which leads to root rot and fungal issues.
Where Should You Plant a Coast Live Oak?
Choose a spot with full sun and well-draining loamy soil with good organic content. Avoid low spots where water collects after rain.
Coast Live Oak is suited to USDA Zone 7a – 10b.
Plant container-grown or balled-and-burlapped trees in spring or early autumn, setting the root flare at soil level, and water well after planting.
How Far Apart Should You Plant a Coast Live Oak?
Coast Live Oak can spread to about 60 ft (18.3 m) and reach about 80 ft (24 m) tall. Space plants about 60 ft (18.3 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 tree spacing calculator.
How Do You Prune a Coast Live Oak?
Prune Coast Live Oak 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 tree in one year.
How Do You Care for a Coast Live Oak in Winter?
Coast Live Oak is hardy down to USDA zone 7a, so once established it can stay outdoors through winter in that zone and warmer ones.
Water deeply in late autumn before the ground freezes, and spread a 5–8 cm (2–3 in) layer of mulch over the root zone, keeping it away from the trunk.
Young and container-grown trees need extra protection: roots in a pot freeze much more easily than roots in the ground.
How Do You Propagate a Coast Live Oak?
Coast Live Oak can be propagated through acorns, grafting. Similar propagation techniques also apply to white oak plant care, which shares the same genus.
Is the Coast Live Oak Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Coast Live Oak, 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 Coast Live Oak?
Coast Live Oak is susceptible to oak leaf blister, oak wilt, gypsy moth. 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 Coast Live Oak Need?
Coast Live Oak grows outdoors in USDA Zone 7a – 10b. It survives winters down to planting zone 7a. Coast Live Oak is native to the California Floristic Province.
Hardiness Zone
Zone 7a – 10b
Keep exploring plants
Coast Live Oak 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 Quercus genus — compare its care with other Quercus species on PlantoScan.
Quercus is part of the Fagaceae plant family — browse all Fagaceae genera and species.
Coast Live Oak thrives in bright light and direct sun — see other bright-light plants.
More Quercus Species
Other Quercus species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Quercus agrifolia Née, family Fagaceae (first published in Anales Ci. Nat. 3: 271 (1801)) — World Flora Online record, IPNI name record, Wikidata.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Coast Live Oak, 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: Alan Rockefeller, CC BY 4.0, iNaturalist — original.
- Hardiness zone: USDA Zone 7a – 10b, 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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