Greater masterwort (Astrantia major)

Also known as: Mountain sanicle

Greater masterwort (Astrantia major) boasts distinctive clusters of small white flowers surrounded by larger bracts, creating a striking visual effect. This perennial is not only easy to cultivate but also deer-resistant and largely free from pests. It pairs beautifully with large ornamental grasses and works well in perennial borders.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting

Attributes of Greater masterwort

Lifespan

Perennial, Annual

Plant Type

Herb

Plant Height

90 cm

Spread

45 cm

Leaf Color

Green

Flower Size

2 cm to 3 cm

Flower Color

White Pink Green Red

Images of Greater masterwort

Quickly Identify Greater masterwort

Astrantia major can be identified by its deeply lobed, dark green leaves and its distinctive, umbel-shaped flower heads. The flower heads consist of many small flowers surrounded by prominent bracts that are often white, pink, or purple. The plant typically grows to a height of 45-60 cm.

Scientific Classification of Greater masterwort

Phylum

Vascular plants

Class

Dicotyledons

Order

Apiales

Family

Umbellifers

Genus

Masterworts

Species

Greater masterwort

Planting and Growing of Greater masterwort

Care Difficulty

Easy

Watering Schedule

Every 8 days

Sunlight Requirements

Partial sun

Sunshine Duration

6-10 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

Once a year

Repotting Season

Spring

Pot Type

Plastic, Ceramic

How to Water Greater masterwort?

Ensure that the soil is thoroughly moist but not waterlogged. You should aim to pour about 500 ml of water each time you water your Astrantia major, enough to let the water penetrate deep into the soil without causing excess run-off.

What are the symptoms of an underwatered Greater masterwort? ›

What should I do if my Greater masterwort is not getting enough water? ›

What are the symptoms of an overwatered Greater masterwort? ›

How to save an overwatered Greater masterwort? ›

What Are the Sunlight Requirements for Greater masterwort?

Sunlight Requirements: Partial sun, Full shade

Duration of light: 4-6 hours daily

Astrantia major flourishes in partial sun conditions. Ideal lighting promotes healthy leaf development and vibrant flower production, enhancing its ornamental beauty in shaded or partially sunny garden spots.

What type of light does Astrantia major prefer? ›

How can you achieve the ideal lighting for Astrantia major? ›

What are the benefits of optimal lighting for Astrantia major? ›

More About Sunlight Requirements Techniques→

What Is the Ideal Temperature Range for Greater masterwort?

Ideal Temperature: 65 ~ 75℉

Astrantia major thrives best in moderate temperature ranges between 65°F to 75°F, where it can maintain healthy growth. These temperatures support optimal photosynthesis and respiration rates, crucial for its development. Maintaining this range ensures the plant exhibits vibrant colors and strong structural integrity, key indicators of its health and vigor during the growing season.

What Soil is Best for Greater masterwort?

Soil type: Loam, Sandy loam, Peat soil

Soil PH: 6.5 ~ 7.5

Astrantia major thrives in soils that have good moisture retention capabilities. The ability of loam and peat soils to hold moisture ensures that the plant remains hydrated, promoting lush growth and vibrant blooms. Rich, organic soil is pivotal for Astrantia major, as it supports robust development. High nutrient content provided by organic matter in loam or peat soils boosts the plant’s vigor and flower production. While moisture is crucial, Astrantia major also requires well-draining soil to prevent root rot. Sandy loam offers an ideal balance, ensuring that excess water is efficiently drained, preventing damaging waterlogging.

How to Fertilize Greater masterwort?

Fertilizer type: Balanced

Astrantia major requires a balanced approach to fertilization. During the growing season, apply a balanced liquid fertilizer at half strength every two weeks. For slow-release granular fertilizers, use them sparingly, about three times a year, ensuring not to overwhelm the plant with nutrients.

How to Prune Greater masterwort?

Pruning Time: Spring, Summer

Astrantia major benefits from regular pruning to maintain its shape and ensure healthy growth. Trim back the spent flower heads and foliage during the summer months to encourage a second bloom and refresh the plant's appearance. Regularly remove dead or faded flowers to promote a longer blooming period. Deadheading not only keeps the plant looking tidy but also directs the plant's energy to produce more vibrant and fresh blooms. At the end of the growing season, late autumn pruning ensures the plant is clean and ready for winter dormancy. Cut back to ground level after the first frost to prepare Astrantia major for rebirth come spring. More About Pruning Techniques→

How to Propagate Greater masterwort plant?

Propagate Time: Late spring, Early summer

Use well-draining soil and ensure it is lightly moist before planting seeds or divisions. This is crucial to prevent over-watering and promote healthy root growth.

Sow seeds in a seed tray, covering them lightly with soil. Keep the soil consistently moist but not soggy, and place in a warm, sunny spot to promote germination.

Carefully dig up an established plant in late spring or early summer, and use a sharp knife to divide the root clump into smaller sections. Replant immediately for best results.

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How to Repot Greater masterwort plant?

Repotting frequency: Every 2-3 years

You should consider repotting your Astrantia major when you notice its growth has slowed significantly or when roots start growing out of the pot's drainage holes. This indicates the plant has outgrown its current pot, and it's time for a new, larger home. Repotting is best done in the spring or autumn to minimize stress.

Choose a pot that is just slightly larger than the current one, with good drainage holes. This size prevents waterlogging and root rot, promoting healthy growth. A pot that fits snugly will encourage stronger root development rather than excessive top growth.

Opt for a soil mix that retains moisture but drains well, such as a mixture of garden soil, compost, and sand. This provides a balance of nutrients and aeration, ensuring that the Astrantia major remains hydrated but not waterlogged, which can lead to root rot.

More About Repotting Techniques→