Noble yarrow (Achillea nobilis)

Also known as: Graceful yarrow

The perennial herb known as noble yarrow, scientifically named Achillea nobilis, derives its name from the legendary Greek hero Achilles. He famously used this plant to heal his soldiers' wounds. While its yellow and creamy white flowers might look similar to common yarrow, noble yarrow can be distinguished by its smaller flower heads. Its leaves are finely divided into needle-like segments, giving them a feathery appearance.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting

Attributes of Noble yarrow

Lifespan

Perennial

Plant Type

Herb

Plant Height

50 cm

Spread

25 cm to 38 cm

Leaf Color

Green Blue

Flower Size

2 cm to 10 cm

Flower Color

White

Images of Noble yarrow

Quickly Identify Noble yarrow

Noble yarrow can be identified by its finely divided, fern-like leaves and clusters of small, white to yellowish flowers. The flowers are arranged in flat-topped corymbs, and the plant typically has a strong aromatic scent.

Scientific Classification of Noble yarrow

Phylum

Vascular plants

Class

Dicotyledons

Order

Asterales

Family

Daisy

Genus

Yarrows

Species

Noble yarrow

Planting and Growing of Noble yarrow

Care Difficulty

Easy

Watering Schedule

Every 2 days

Sunlight Requirements

Full sun

Sunshine Duration

4-6 hours

Ideal Temperature

65-75℉

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 Noble yarrow?

Achillea nobilis requires a careful balance of water. The amount should be just enough to moisten the soil without making it soggy. Typically, you should use about 250 ml of water per session. The goal is to allow the soil to be slightly damp, which supports the plant's root system without drowning it.

What are the symptoms of an underwatered Noble yarrow? ›

What should I do if my Noble yarrow is not getting enough water? ›

What are the symptoms of an overwatered Noble yarrow? ›

How to save an overwatered Noble yarrow? ›

What Are the Sunlight Requirements for Noble yarrow?

Sunlight Requirements: Full sun

Duration of light: 6-8 hours daily

Achillea nobilis ideally grows in full sun, receiving adequate light for dense foliage and vibrant blooms. This enhances photosynthesis efficiency, crucial for its growth and flower production.

Optimal Sunlight Exposure ›

Avoiding Excessive Shade ›

Balancing Sunlight with Soil Conditions ›

More About Sunlight Requirements Techniques→

What Is the Ideal Temperature Range for Noble yarrow?

Ideal Temperature: 65 ~ 75℉

The ideal temperature range for Achillea nobilis should be between 65°F and 75°F. This range ensures optimal growth and flowering potential, given the plant's natural adaptation to temperate climates. Maintaining this temperature fosters strong development and enhances resistance to pests and diseases.

What Soil is Best for Noble yarrow?

Soil type: Loam, Sandy loam, Calcareous soil

Soil PH: 6.5 ~ 7.5

Achillea nobilis thrives in well-draining soil that prevents waterlogging. This condition is crucial as it mimics the plant's natural habitat and supports healthy root development, leading to vibrant growth. This plant does not demand overly rich soil; moderate nutrient levels suffice. Excessive fertilizer can lead to leggy growth, whereas moderate levels encourage compact, robust plants that can better resist pests. Achillea nobilis prefers soil that is slightly alkaline. Maintaining this pH range enhances nutrient uptake and ensures that the plant grows optimally without nutrient deficiencies that would otherwise stifle its progress.

How to Fertilize Noble yarrow?

Fertilizer type: Balanced

For Achillea nobilis, use a balanced liquid fertilizer at a rate of 1 teaspoon per gallon of water. This ensures the plant receives an adequate supply without overwhelming its root system.

How to Prune Noble yarrow?

Pruning Time: Autumn, Spring

Begin by inspecting the plant for any dead or diseased stems. These can often be identified by their brown, brittle appearance or any soft, mushy sections. Carefully snip them away at the base to help prevent disease from spreading and to open up the plant for better airflow. Focus on improving the plant’s structure by cutting back overgrown branches. Trim back the longest stems by about half their length to encourage the plant to produce lateral shoots. Achillea nobilis responds well to this, resulting in a fuller, bushier plant with increased blooms. More About Pruning Techniques→

How to Propagate Noble yarrow plant?

Propagate Time: Spring, Early summer

Use well-draining soil mixed with compost for optimal seed germination and root development. Ensure the soil is moist but not waterlogged before sowing seeds or planting cuttings.

Scatter seeds on the surface of the soil and lightly cover them with a thin layer of soil. Maintain constant humidity and light exposure until seeds germinate, which may take up to 2-3 weeks.

Select a healthy parent plant and cut a stem of about 10 cm just below a node. Remove the lower leaves and dip the cut end into rooting hormone to promote root growth.

More About Propagating Techniques→

How to Repot Noble yarrow plant?

Repotting frequency: every 2-3 years

Achillea nobilis should be repotted when you notice roots emerging from the drainage holes or when the growth rate diminishes noticeably. These are signals that the plant has outgrown its current pot and needs new space to thrive. Repotting during the warmer months ensures optimum recovery and growth.

Opt for a pot that is one size larger than the current one. Ideally, the pot should have drainage holes to prevent root rot. A clay or terracotta pot can be advantageous as it allows air to circulate through the soil, fostering a healthier root system.

Select a well-draining loam mix that retains some moisture yet prevents waterlogging. This soil will provide a balanced environment, supply essential nutrients, and encourage strong root development which are crucial for the plant's health.