Wavyleaf mullein (Verbascum sinuatum)
Also known as: Candela regia
Wavyleaf mullein (Verbascum sinuatum) is named for its wavy-edged leaves, as indicated by the term "sinuatum." The plant itself has a somewhat rugged, bearded appearance, aligning with its Latin root "barbascum" in the genus name. A unique characteristic of its flowers is that they swiftly shed their petals—within about 30 seconds—if touched or damaged.
In This Article
Attributes of Wavyleaf mullein
Lifespan
Biennial
Plant Type
Herb
Plant Height
1.2 m to 1.5 m
Spread
Up to 60 cm (24 inches)
Leaf Color
Green Blue
Flower Size
Approximately 2 to 3 cm (0.8 to 1.2 inches)
Flower Color
Yellow
Images of Wavyleaf mullein
Quickly Identify Wavyleaf mullein
1
Look for its wavy-edged leaves and tall, slender spikes with dense clusters of small, bright yellow flowers.
Scientific Classification of Wavyleaf mullein
Phylum
Vascular plants
Class
Dicotyledons
Order
Lamiales
Family
Figwort
Genus
Mullein
Species
Wavyleaf mullein
Planting and Growing of Wavyleaf mullein
Care Difficulty
Easy
Watering Schedule
Every 2 days
Sunlight Requirements
Full sun
Sunshine Duration
6-10 hours
Ideal Temperature
60-75℉
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
Plastic, Ceramic
How to Water Wavyleaf mullein?
Verbascum sinuatum prefers well-drained soil and moderate watering. Ensure the top inch of soil is dry before watering. When watering, apply enough water to moisten the root zone, approximately 500 ml, ensuring the water reaches deep rather than just wetting the surface.
What are the symptoms of an underwatered Wavyleaf mullein?
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What should I do if my Wavyleaf mullein is not getting enough water?
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What are the symptoms of an overwatered Wavyleaf mullein?
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How to save an overwatered Wavyleaf mullein?
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What Are the Sunlight Requirements for Wavyleaf mullein?
Verbascum sinuatum prefers full to partial sun. Adequate sunlight ensures vibrant blooms and healthy growth, contributing to its striking aesthetic appeal.
More About Sunlight Requirements Techniques→
How much light does it need?
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What if full sun is unavailable?
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How can I ensure optimal light conditions?
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What Is the Ideal Temperature Range for Wavyleaf mullein?
The ideal temperature range for Verbascum sinuatum lies between 60°F and 75°F. Maintaining this temperature range is crucial for the optimal growth and development of the plant as it ensures that the plant can photosynthesize efficiently, uptake nutrients effectively, and ward off common pests and diseases. If the temperature is consistently held in this optimal range, the plant is more likely to exhibit healthy foliage, vibrant blooms, and robust root systems.
What Soil is Best for Wavyleaf mullein?
Verbascum sinuatum thrives in well-drained soils as it helps prevent root rot, ensuring that the roots have access to necessary oxygen and nutrients. Such conditions mimic its natural environment, promoting sturdy growth and abundant flowering. While Verbascum sinuatum can adapt to nutrient-poor soils, providing a nutrient-rich base promotes healthier growth and more vibrant blooms. Supplemental compost or organic matter can enhance soil fertility, giving the plant a strong start. This plant prefers moderate moisture levels in the soil without prolonged wetness. Maintaining such moisture helps sustain its growth cycle, prevents stress, and aids in proper nutrient uptake, ultimately leading to a robust plant structure.
How to Fertilize Wavyleaf mullein?
Verbascum sinuatum, also known as the waved-leaved mullein, benefits from moderate fertilization. Use a balanced fertilizer diluted to half-strength for optimal results. For liquid fertilizers, apply approximately 250 ml per plant per session, ensuring the soil is evenly moist but not waterlogged.
How to Prune Wavyleaf mullein?
When pruning Verbascum sinuatum, start by removing any dead, damaged, or diseased foliage and stems. Use sharp, clean pruners to make clean cuts at an angle. Focus on removing older and less productive stems at the base to promote new growth, and maintain the plant's natural shape. If your Verbascum sinuatum looks overgrown or less vigorous, consider rejuvenation pruning. In early spring, cut back a third of the oldest stems to just above the ground. This encourages the plant to produce new, vigorous shoots. Remember not to remove more than a third of the plant's overall growth in a single season to avoid shock.
More About Pruning Techniques→
How to Propagate Wavyleaf mullein plant?
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Collect the seeds from mature Verbascum sinuatum plants. Before sowing, it is beneficial to stratify the seeds by placing them in a cold environment for a few weeks to break dormancy.
2
Fill a seed tray with potting soil, and lightly press the seeds onto the surface. Do not bury them too deep as they require light for germination. Gently water the soil and place the tray in a bright location.
3
Once the seedlings have developed a set of true leaves, they can be carefully transplanted into individual pots or directly into the garden. Ensure the new location has similar growing conditions to their initial environment.
How to Repot Wavyleaf mullein plant?
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You should consider repotting Verbascum sinuatum when you notice roots poking through the drainage holes or if the plant's growth seems sluggish. These are key indicators that the plant has outgrown its pot and needs more room to thrive.
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Select a pot that is one size larger than the current one, ensuring it has adequate drainage holes. This helps prevent waterlogging, which can lead to root rot. A slightly larger pot encourages healthy root expansion without overwhelming the plant.
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Opt for a well-draining sandy soil mix. Such a mix prevents water from sitting in the pot, reducing the risk of root rot while providing a stable structure that supports robust root growth and aeration.
