Osmanthus heterophyllus
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Osmanthus heterophyllus

Chinese-holly · False holly · Holly Osmanthus · Holly-olive · Conocarpus erected L.

Tier 1 Difficulty: easy Water: low Light: full_sun Toxicity: low
Water every
7 days
Temperature
15–35 °C
Soil pH
6–6
Hardiness
Zone 7–9
Click count
542
Observations
1,729

Description

Source: leafsnap

Osmanthus heterophyllus, commonly known as holly osmanthus or false holly, is an evergreen shrub native to Japan and China. Belonging to the family Oleaceae, it can grow up to 6 meters tall. The plant features glossy, dark green leaves that are spiny, resembling those of a holly plant. In the fall, it produces small, white or cream-colored flowers with a sweet fragrance reminiscent of apricots. Due to its attractive foliage and fragrant flowers, Osmanthus heterophyllus is often used as an ornamental plant in gardens. It thrives in full sun or partial shade and prefers well-drained soil with regular watering. In traditional Chinese medicine, the leaves of Osmanthus heterophyllus have been used for their anti-inflammatory properties. Additionally, its dried flowers are popular in culinary applications, serving as a flavoring agent for tea, wine, desserts, and other dishes. Overall, Osmanthus heterophyllus is a versatile shrub valued for its ornamental beauty, medicinal properties, and culinary uses.

🌳 The holly olive, which resembles English Holly, is known for its lush evergreen foliage and dense growth. These characteristics make it perfect for use as a hedge or screen. Additionally, its decorative leaves, cold-season blooms, and appealing oval shape make it an excellent choice as a specimen shrub. Moreover, the holly olive is hardy and low-maintenance, making it an easy addition to any garden.

🎭 Forethought

Care Guide

💧 Water Every 7 days

Holly olive thrives in well-drained soils and moderate humidity. It should be watered every 1-2 weeks, allowing the soil to dry out slightly between waterings. Although it is best grown outdoors, using mulch can help retain moisture and shield the plant from temperature fluctuations.

Suggested frequency: Every 7 days
FAQ
How should I water my Holly olive plant?

Your Holly olive is not too fussy when it comes to watering. You can use any common watering tool like a watering can, hose, or even a cup to water the plant. It's important to water it directly on the soil, making sure to evenly moisten all parts of the root system. Using filtered water is recommended to avoid harmful particles found in tap water. Additionally, using water at or slightly above room temperature is best as very cold or hot water can shock the Holly olive. However, the Holly olive usually responds well to any type of water.

If I give my Holly olive plant too much or too little water, what should I do?

When caring for outdoor plants, especially newly planted ones or seedlings, it's important to watch out for inadequate watering. Remember to provide enough water for the first few months while the plant is small or recently planted. Once the roots are established, the Holly olive can rely on rain most of the time. If you have Holly olive plants in pots, be cautious of overwatering. In the event of accidental overwatering, take immediate action to fix the situation. Stop watering the plant right away to minimize the impact of overwatering. Then, remove the plant from its pot to inspect the roots. If there are no signs of root rot, you can put the plant back in its container. If root rot is present, trim any affected roots and consider using a fungicide to prevent further damage. Finally, repot the Holly olive in well-draining soil. On the other hand, underwatering a Holly olive can also be easily resolved. If you notice the leaves drooping, drying out, or falling off, increase the frequency of watering. The leaves should recover quickly and regain their fullness. Keep an eye on your watering habits and adjust as necessary to avoid underwatering.

How frequently should I water my Holly olive plant?

Most outdoor plants can grow normally with rainfall. However, if your area has little rainfall, you should water your plants adequately every 2 weeks in the spring and fall. In the summer, you'll need to water more frequently. In winter, when growth slows down and plants need less water, water sparingly or not at all. If your Holly olive plant is young or newly planted, it's important to water it more often to help it establish and grow into a more adaptable and drought-tolerant plant. For potted plants, there are two main ways to determine watering frequency for your Holly olive. The first is to follow a predetermined watering schedule, such as once a week or every other week. However, this may not always be suitable for the specific conditions of your plant's growing environment. Watering frequency can also vary depending on the season. During summer, when the plant's water needs are highest, a predetermined schedule may not be enough. An alternative approach is to water based on soil moisture. It's best to wait until the top few inches of soil, about ⅓ to ½ depth of the pots, have completely dried out before giving more water.

How much water does my Holly olive tree need?

Watering your Holly olive plant may not require a high volume of water. If only a few inches of soil have dried since the last watering, giving it about five to ten ounces of water can support healthy growth. You can determine the water volume based on the soil moisture, specifically noting how many inches of soil have dried out. To ensure the plant gets enough moisture, water enough to moisten all dry soil layers since the last watering. If over half of the soil has dried, consider giving more water until excess water drains from the pot's holes. If the Holly olive is in a rain-rich area outdoors, additional watering may not be necessary. Young or establishing plants should receive 1-2 inches of rain per week, but as they grow and establish, they can rely on rainwater alone. Only provide a full watering during hot weather with no rainfall for 2-3 weeks to prevent stress.

How do I know if I am giving enough water to my Holly olive?

Overwatering is often a problem for the Holly olive, and there are clear signs to watch out for. If your Holly olive is overwatered, its leaves will turn yellow and it may shed some leaves. Additionally, overwatering can cause the plant's overall structure to shrink and may lead to root rot. Conversely, if your Holly olive is underwatered, it will start to droop and its leaves may become brown and brittle. Regardless of whether you notice signs of overwatering or underwatering, it's important to take action and restore your Holly olive's health.

☀️ Light Full sun

The holly olive grows best when receiving plentiful sunlight throughout the day, though it can tolerate moderate sun. In its native habitat it prospers in full-day sun. Both excessive shade and overly intense sunlight can diminish the plant's vigor.

Ideal: Full sun
FAQ
What are the sunlight requirements for Holly Olive?

Holly Olive (Osmanthus heterophyllus) thrives in conditions where it can receive abundant sunshine throughout the day. It is adaptable and can still flourish under moderate sun conditions, although it naturally prefers full day sunlight in its native habitat. The plant requires either full sun, which is above 6 hours of sunlight per day, or partial sun, about 3-6 hours of sunlight per day. When planning your garden, it's crucial to watch how sunlight moves through the area to ensure you're choosing spots that provide the perfect balance of light and shade for your plants, including the Holly Olive, to ensure their happiness.

How do indoor plants benefit from artificial lighting?

Indoor plants benefit significantly from artificial lighting, especially when natural sunlight is insufficient, such as during winter or in less sunny spaces within a home or office. Artificial lighting promotes faster and healthier growth. LED lights are particularly recommended as they can be adjusted to provide specific wavelengths of light that plants require. For optimal growth, full sun plants need 30-50W/sq ft of artificial light, partial sun plants need 20-30W/sq ft, and full shade plants require 10-20W/sq ft. The light source should be placed 12-36 inches above the plant to mimic natural sunlight conditions and should be kept on for 8-12 hours per day to mimic the length of natural daylight hours.

What are some common symptoms of light deficiency in Holly Olive?

Holly Olive can exhibit several symptoms when subjected to suboptimal lighting conditions, indicative of light deficiency or overexposure. Common symptoms include smaller new leaves, leggy or sparse growth, faster leaf drop, slower or no new growth, and lighter-colored or yellowing leaves (chlorosis). Excessive sunlight exposure can lead to sunscald, leaf curling, wilting, and leaf scorching, indicating damage or stress from too much light. These symptoms highlight the importance of providing the Holly Olive with an appropriate balance of sunlight to maintain its health and vigor.

How can I improve the growth of my Holly Olive with insufficient natural light?

To support the growth of Holly Olive in conditions of insufficient natural light, consider gradually moving the plant to a sunnier location, ensuring it receives at least 6 hours of direct sunlight daily. For indoor plants, utilizing a south-facing window while keeping curtains open during the day maximizes sunlight exposure. If the plant is large or not easily movable, supplementing with artificial lighting, such as keeping a desk lamp on for at least 8 hours daily or investing in professional plant grow lights, can be beneficial. For outdoor plants, it's crucial to move them gradually to prevent sunburn, allowing them to adapt to increased light intensities. It's also important to consider reducing obstructions like pruning trees that block sunlight or transplanting smaller plants during their dormant period to spots with ample sunlight and good drainage.

🌡️ Temperature 15–35°C

Holly olive grows best within a temperature range of 59 to 95 ℉ (15 to 35 ℃). It originates from regions with mild winters, such as Japan and China. In colder areas, providing some winter protection can help prevent frost damage.

Ideal temperature: 15–35°C
FAQ
What temperature range is ideal for Holly Olive?

Holly Olive, also known as Osmanthus heterophyllus, thrives in a temperature range of 59 to 95°F (15 to 35°C). Originating from regions like Japan and China, which have mild winter climates, it showcases strong cold resistance. While it usually doesn't require special frost protection, in areas where winter temperatures dip below -15°C, steps should be taken to wrap the plant's trunk and branches with insulating materials. Additionally, ensuring the soil is moist before the onset of the first freeze can help the plant through winter and early spring by preventing drought and water scarcity.

How does Holly Olive react to low temperatures?

Holly Olive is cold-tolerant, performing best in temperatures above 15°C and should ideally not be exposed to conditions colder than -10°C. Exposure to temperatures below -15°C might not show immediate damage during winter, but it could lead to brittle and dry branches by spring, with an absence of new shoots. To mitigate these effects, it is advisable to prune away any dead branches in the spring that haven't produced new leaves, allowing for healthier growth.

What should be done if Holly Olive experiences high temperatures?

In the summer months, it's important to ensure that Holly Olive isn't exposed to temperatures above 35°C. Temperatures exceeding 38°C can cause the leaves to lighten in color and the tips to become dry and withered, increasing the plant's risk of sunburn. To protect the plant in such conditions, remove any sunburned or dried parts, relocate it to a shadier spot, or use a shade cloth to shield it from the midday and afternoon sun. Also, watering the plant in the morning and evening will help keep the soil adequately moist and support the health of the plant.

💨 Humidity normal (40-60%)

This plant will thrive in moderate humidity, which is probably the level in your home. However, misting it a few times a week can be very beneficial. Make sure the room has good ventilation.

Humidity: normal (40-60%)
🪴 Soil 6-6
Soil pH: 6-6
🌱 Fertilizer

To encourage healthy growth, apply fertilizer to your Holly olive in early spring. Routine feeding boosts the plant’s overall health, leading to robust growth, greater tolerance of harsh conditions, and increased resistance to diseases and pests. Keep a consistent fertilization routine for your Holly olive to maintain foliage that is vibrant, richly colored, and lush in appearance.

FAQ
Why should I add fertilizer to my Holly olive plant?

No matter what type of Holly olive you have, regularly fertilizing it will promote overall plant health. Adequate nutrients lead to stronger growth and increased resilience to difficult growing conditions, as well as improved ability to combat diseases and pests. The foliage of your Holly olive is an attractive characteristic, so it's important to maintain it. To do this, establish and follow a consistent fertilizer schedule tailored to your specific Holly olive. This will encourage the development of lush, deeply-colored leaves.

When should I fertilize my Holly olive tree?

To ensure healthy growth of your Holly olive, the first time to fertilize is in late winter or early spring. This provides the necessary nutrients for the plant to thrive once the weather gets warmer. In warm climate regions, it is also beneficial to provide another round of fertilization in early fall. This helps the Holly olive absorb nutrients for the upcoming growing season and increases its ability to withstand the cold of winter without foliage damage. Fertilizing earlier will promote strong branch growth to withstand the winter conditions.

When is it not a good idea to add fertilizer to my Holly olive plant?

There are specific times of the year when you should avoid fertilizing your Holly olive plant. One such time is during the early and mid-winter months, when the plant is dormant and doesn't require any nutrients. Similarly, it is not advisable to fertilize the plant in late spring and throughout the summer. During this period, the weather tends to be hotter and drier, which can negatively impact the plant's response to fertilization. To prevent any potential problems, it's best to stick to a fertilization schedule that involves feeding the plant only in early spring and early fall.

What kind of fertilizer should I use for my Holly olive?

The most important nutrient for a Holly olive is usually nitrogen, but phosphorus and potassium are also important. So, a balanced fertilizer like 10-10-10 can be helpful as it provides all three nutrients. However, for optimal growth, it's often better to use a fertilizer with a higher nitrogen content, like 10-6-4. When fertilizing, you can choose between granular or liquid-based fertilizers.

How can I make my Holly olive plant grow better?

To fertilize your Holly olive using granular fertilizer, simply sprinkle it on the soil at the right time. The slow-release nature of this type of fertilizer releases nutrients gradually over time. It's a good idea to lightly water your Holly olive before applying the fertilizer. Another option is using liquid fertilizer, although this is less common. To do this, mix the fertilizer with water and pour it onto the soil around the base of your Holly olive. Sometimes, it's helpful to perform a soil test beforehand to determine if any pH adjustments are necessary.

🪴 Pot & Repot 2-3 years

When repotting Holly olive, select a pot 1-2 inches (2.5–5.1 cm) larger that provides ample drainage. Use a well-draining potting mix. Repot in spring or fall, ensuring the root ball sits slightly lower than the rim of the flower pot. Water thoroughly after repotting and place the plant in a warm spot with indirect sunlight.

Suggested frequency: 2-3 years
✂️ Pruning

The holly olive is an evergreen shrub known for its spiny, glossy leaves and fragrant flowers. To maintain its shape and health, prune it in early spring. Start by removing any dead or damaged branches. This will encourage dense growth and more abundant blooms. Be careful to avoid heavy pruning in late fall, as this could lead to frost damage.

🌿 Propagating
🐛 Diseases & pets
☠️ Toxicity

Characteristics

Plant Type
Shrub, Tree
Life Cycle
Perennial
Genus
Osmanthus
Family
Oleaceae
Hardiness Zone
7-9
Mature Height
2.13 m to 7.92 m
Mature Spread
2.13 m to 2.74 m
Leaf Color
Green, Yellow
Leaf Type
Evergreen
Flower Color
White
Flower Size
2.54 cm
Bloom Time
Mid summer, Late summer
Planting Time
Spring, Autumn
Harvest Time
Early spring, Fall, Winter
Native Area
South Korea, Japan, China

Tags (8)

Common Names (5)

en Chinese-holly
en False holly
en Holly Osmanthus
en Holly-olive
en Conocarpus erected L.