Sweet autumn clematis (Clematis terniflora)

Also known as: Sweet autumn virginsbower, Yam-leaved clematis, Japanese clematis

Sweet Autumn Clematis, a vine in the buttercup family, was initially brought to the United States for ornamental purposes. Over time, it has naturalized and become invasive in certain regions. This plant is notable for its white blooms that appear in the fall.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting Toxicity

Attributes of Sweet autumn clematis

Lifespan

Perennial

Plant Type

Vine

Plant Height

4.5 m to 9 m

Spread

4.5 m to 9 m

Leaf Color

Green

Flower Size

2.5 cm to 8 cm

Flower Color

White

Images of Sweet autumn clematis

Quickly Identify Sweet autumn clematis

Vigorous climbing habit, reaching 15-30 feet (4.5-9 meters) in height and width.

Abundance of showy, fragrant white flowers with 1-inch (2.5 cm) diameter.

Fruit with plume-like seed heads, each fruit having a long white tail.

Compound leaves with 3-5 leaflets, apically rounded and basally cordate.

Stems with longitudinally shredded bark, transitioning from green to light brown.

Scientific Classification of Sweet autumn clematis

Phylum

Vascular plants

Class

Dicotyledons

Order

Buttercups, poppies and allies

Family

Buttercup

Genus

Clematis

Species

Sweet autumn clematis

Planting and Growing of Sweet autumn clematis

Care Difficulty

Easy

Watering Schedule

Every 4 days

Sunlight Requirements

Full sun

Sunshine Duration

4-8 hours

Ideal Temperature

68-77℉

Soil Type

Potting Mix, Peat Mix

Soil pH

6.5-7.5

Fertilizer Type

Balanced

Pruning Season

Spring, Summer

Pruning Area

Branches, Leaves

Pruning Frequency

2 times a year

Repotting Season

Spring

Pot Type

Terracotta, Plastic

How to Water Sweet autumn clematis?

When watering Clematis terniflora, ensure the soil is moistened deeply, reaching down to about 6-8 inches. This typically requires approximately 500 ml of water per session. The goal is to maintain consistently moist but not waterlogged soil.

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What Are the Sunlight Requirements for Sweet autumn clematis?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 6 to 8 hours daily

The ideal light range for Clematis terniflora is full to partial sun. Proper lighting promotes lush, dense foliage and maximizes blooming potential, making it a centerpiece in ornamental gardens.

How much sun does it need? ›

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What Is the Ideal Temperature Range for Sweet autumn clematis?

Ideal Temperature: 68 ~ 77℉

The ideal temperature range for Clematis terniflora is between 68°F and 77°F. Maintaining this range ensures optimal growth and blooming. These temperatures provide a balanced environment that supports metabolic processes and helps in disease resistance. It is essential to manage both daytime and nighttime temperatures within this range for best results.

What Soil is Best for Sweet autumn clematis?

Soil type: Loam, Sandy loam

Soil PH: 6.5 ~ 7.5

Clematis terniflora thrives in soil that offers excellent drainage. Proper drainage prevents waterlogging which can lead to root rot, ensuring the plant maintains healthy growth and vibrant blooms. This plant prefers nutrient-rich soil that provides necessary minerals for optimal growth. The presence of essential nutrients in the soil supports strong stem development and lush foliage. While the soil should be well-draining, it also needs to retain sufficient moisture. Balanced moisture levels help support continuous hydration needs, preventing wilting and promoting resilience during dry spells. More About Soil→

How to Fertilize Sweet autumn clematis?

Fertilizer type: Balanced

For Clematis terniflora, a balanced approach to fertilizer can boost its growth, but it is essential not to overdo it. When using a liquid fertilizer, mix in a ratio of 1/2 teaspoon per gallon of water, ensuring the solution isn't too strong. For slow-release fertilizers, apply about 1 ounce per square foot around the plant base once a year. These amounts cater to its growth without overwhelming its root system. More About Fertilizing Techniques→

How to Prune Sweet autumn clematis?

Pruning Time: Spring, Summer, Autumn

Start by assessing your Clematis terniflora for dead or damaged stems. This can usually be identified by a lack of foliage or an unhealthy color. Removing these helps the plant focus its energy on healthy growth. Trim back the overgrown vines to your desired size. Ensure you're making cuts just above a set of leaves to encourage lateral growth. This helps the plant maintain a neater appearance and fuller growth. Since this clematis blooms on new wood, prioritize trimming during early spring before new growth spurts. This allows the plant ample time to develop fresh stems that will carry blossoms throughout the season. More About Pruning Techniques→

How to Propagate Sweet autumn clematis plant?

Propagate Time: Spring, Early spring, Late autumn

Clematis seeds often need stratification, a cold treatment, to break dormancy. Place the seeds in a moist medium in a refrigerator for a period of 2 to 3 months before planting in a seed tray.

Select healthy stems and cut sections about 4-6 inches long. Ensure each cutting has at least one node, as this is crucial for rooting and future growth.

Select a low-growing stem and make a small wound on it. Bury this section under soil while ensuring that the growing tip is exposed. Keep the soil moist until roots establish.

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How to Repot Sweet autumn clematis plant?

Repotting frequency: Every couple of years

Clematis terniflora shows signs of needing repotting when you notice roots protruding through the drainage holes or the growth rate slows considerably. These signs suggest that the plant has outgrown its current pot and needs more space to flourish. Performing this task during spring or summer can minimize the stress on the plant and promote healthy new growth.

Select a pot that is 1-2 inches larger in diameter than the current one, ensuring it has ample drainage holes. The added space allows room for root expansion, enhancing the plant's vigor and ensuring that the roots have adequate space to breathe. Good drainage prevents waterlogging, which is crucial for the plant’s health.

Opt for a well-draining fertile mix for repotting Clematis terniflora. The ideal soil should retain moisture yet drain excess water efficiently to prevent root rot. A nutrient-rich medium supports robust growth and prolific blooming, ensuring that the plant has ample essential elements for its development.

Toxicity of Sweet autumn clematis

Is Sweet autumn clematis toxic to humans?

The sweet autumn clematis presents a moderate level of toxicity risk to humans. Any interaction with any part of the plant may result in poisoning, as every part contains toxic compounds. Poisoning may occur through skin contact or accidental consumption. The toxic agent implicated is protoanemonin, which can cause significant irritation upon contact. If ingested, sweet autumn clematis can produce a variety of symptoms such as oral discomfort, digestive disturbances, vomiting, and diarrhea. The intensity of symptoms can vary depending on the level of exposure and personal sensitivity. Caution is highly recommended to avoid accidental poisoning from sweet autumn clematis, particularly in regions where this plant is commonly found.

Is Sweet autumn clematis toxic to cat?

Sweet autumn clematis presents a moderate danger to cats, as the entire plant is toxic. Cats may experience poisoning either through skin contact or unintentional ingestion, potentially resulting in signs of physical distress or illness. The toxic compound found in sweet autumn clematis is known as protoanemonin. After exposure or ingestion of sweet autumn clematis, it is crucial for cat owners to swiftly pursue veterinary assistance to alleviate the poisoning effects and safeguard the health of their feline friend.

Is Sweet autumn clematis toxic to dog?

Sweet autumn clematis presents a moderate toxicity threat to dogs. Canines can experience poisoning from this plant via skin contact or unintentional ingestion. The entire plant is toxic, and exposure may result in a variety of symptoms including gastrointestinal distress, excessive salivation, vomiting, diarrhea, and, in some instances, dermatitis from skin exposure. The harmful compound that triggers these reactions is protoanemonin. If you suspect that your dog has encountered or ingested sweet autumn clematis, it is crucial to seek prompt veterinary assistance to secure the best possible outcome for your pet.

WARNING

The judgment on toxicity and danger is for reference only. We DO NOT GUARANTEE any accuracy of such judgment. Therefore, you SHALL NOT rely on such judgment. It is IMPORTANT TO SEEK PROFESSIONAL ADVICE in advance when necessary.

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