Berberis aquifolium
Berberis aquifoliumUSDA | Grow Zone
5-9Outdoors all year in zones 5 to 9. Anywhere colder, keep it as a houseplant. Protect it below 20°F.
- Light
- Full sun to partial shade
- Water
- Moderate, weekly in growth
- Humidity
- Moderate humidity preferred
- Temperature
- 60-75°F (15-24°C)
- Difficulty
- Intermediate
- Growth
- Moderate
- Mature size
- 3-6 ft tall, 3-4 ft wide
Berberis aquifolium, or Oregon grape, is a versatile evergreen shrub native to North America. Known for its attractive foliage and edible berries, it is a popular choice for gardens and landscapes.
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Ideal temperature
60-75°F is where it grows fastest. Below 20°F cold damage starts.
Spacing and harvest
- Mature size
- 3-6 ft tall, 3-4 ft wide
- Plant apart
- 36-48 in
- Frost
- Hardy: survives frost
Everything it needs
9 essentials at a glance
Watering
Berberis aquifolium, commonly known as Oregon grape, prefers moderate watering.
Water deeply once a week during the growing season, allowing the top inch of soil to dry out between waterings. In the winter, reduce watering to once every two weeks. Signs of over-watering include yellowing leaves and root rot, while under-watering can cause leaf drop and wilting.
Light
This plant thrives in full sun to partial shade, ideally receiving at least 6 hours of direct sunlight daily.
It can tolerate some shade, but too much can lead to leggy growth and reduced flowering. Ensure it is placed where it can receive morning sun and some afternoon shade in hotter climates.
Soil
Oregon grape prefers well-draining, loamy soil with a pH range of 6.0 to 7.0.
It benefits from organic matter mixed into the soil to improve drainage and nutrient retention. A recommended potting mix includes peat, perlite, and compost to provide the right balance of moisture and aeration.
Humidity
Berberis aquifolium is adaptable to various humidity levels but prefers moderate humidity.
To increase humidity, mist the plant occasionally or place it on a pebble tray filled with water. Signs of low humidity stress include browning leaf tips and overall wilting.
Temperature
This plant thrives in temperatures between 60-75°F (15-24°C) and is hardy in USDA zones 5-9.
It can tolerate cold temperatures down to 20°F (-6°C) but may suffer in extreme heat above 90°F (32°C). During winter, protect it from harsh winds and frost.
Fertilizing
Use a balanced fertilizer with an NPK ratio of 10-10-10, applying it every 4-6 weeks during the growing season.
In fall, switch to a low-nitrogen fertilizer to prepare the plant for winter. Signs of nutrient deficiency include yellowing leaves, stunted growth, and poor flowering.
Pruning
Prune Oregon grape in late winter or early spring to shape the plant and remove any dead or damaged branches.
Use sharp, clean pruning shears to make clean cuts. Deadheading spent flowers can encourage more blooms and improve overall appearance.
Repotting
Repot Berberis aquifolium every 2-3 years or when the roots outgrow the pot.
Signs it needs repotting include roots growing out of the drainage holes and stunted growth. Choose a pot 1-2 inches larger in diameter and follow these steps: gently remove the plant, trim any damaged roots, and place it in fresh potting mix.
Propagation
Oregon grape can be propagated through stem cuttings or division.
For stem cuttings, take 4-6 inch cuttings in late spring, dip the cut end in rooting hormone, and plant in a moist potting mix. Keep the cuttings in a warm, humid environment until roots develop. Division is best done in early spring when the plant is actively growing.
When it's unhappy
Yellow leaves
Why it happens
This can be caused by over-watering or nutrient deficiency.
How to fix it
Check the soil moisture and reduce watering if necessary. Consider fertilizing with a balanced fertilizer.
Root rot
Why it happens
Root rot is typically caused by overly wet soil and poor drainage.
How to fix it
Ensure the pot has adequate drainage and allow the soil to dry out before watering again. Remove any affected roots.
Wilting leaves
Why it happens
Wilting can occur due to under-watering or extreme heat.
How to fix it
Increase watering frequency and ensure the plant is not exposed to excessive heat.
Leggy growth
Why it happens
This is often a result of insufficient light.
How to fix it
Move the plant to a sunnier location to encourage bushier growth.
Pest infestations (e.g., aphids)
Why it happens
Pests can thrive in warm, dry conditions.
How to fix it
Inspect the plant regularly and treat infestations with insecticidal soap or neem oil.
Care through the year
Spring
In spring, prune any dead or damaged branches and fertilize with a balanced fertilizer to promote new growth. Monitor for pests as the weather warms.
Summer
During summer, ensure consistent watering, especially in hot weather. Mulching can help retain soil moisture and keep roots cool.
Fall
In fall, reduce watering as the plant enters dormancy. Apply a low-nitrogen fertilizer to prepare the plant for winter.
Winter
In winter, protect the plant from harsh winds and frost. Water sparingly, only when the soil is dry, to prevent root rot.
Toxicity & Safety
Berberis aquifolium is non-toxic to pets and children. However, ingestion of large quantities may cause mild gastrointestinal upset. The berries are edible but should be consumed in moderation.
Good to know
Why are my Oregon grape leaves turning yellow?
Yellow leaves on Berberis aquifolium can indicate over-watering or a nutrient deficiency. Check the soil moisture and consider fertilizing if needed.
How often should I water my Oregon grape?
Water your Oregon grape deeply once a week during the growing season, allowing the top inch of soil to dry out between waterings.
What type of soil is best for Berberis aquifolium?
Oregon grape prefers well-draining, loamy soil with a pH range of 6.0 to 7.0. Mixing in organic matter can enhance drainage and nutrient retention.
When is the best time to prune Oregon grape?
The best time to prune Berberis aquifolium is in late winter or early spring before new growth begins. This helps maintain its shape and health.
Can I propagate Oregon grape from cuttings?
Yes, Berberis aquifolium can be propagated from stem cuttings taken in late spring. Use rooting hormone and keep the cuttings in a warm, humid environment.
What pests affect Oregon grape?
Common pests include aphids and spider mites. Regularly inspect your plant and treat infestations promptly with insecticidal soap or neem oil.
How tall does Berberis aquifolium grow?
Oregon grape typically reaches a mature height of 3-6 feet and can spread 3-4 feet wide, making it suitable for hedges or borders.
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