Astrantia Midnight Owl

Masterwort

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Violet-red sprays of branching flowers with pincushion centers nestled in papery bracts.

Intricate upright violet-red sprays of branching flowers captivate passersby. The pincushion-like centers are nestled in papery bracts. Nearly leafless flower stems rise above the lobed foliage. Whoo cant get enough of Astrantia? We cant!

Astrantia Midnight Owl is prized for fresh or dried floral arrangements. Picking flowers results in even more blooms. For added interest, bracts remain attractive even after the flowers fade. Masterwort have been cultivated in Britain since the 16th century.

Note: This is an archive page preserved for informational use.
Cultural and Growing Info is provided below.


Violet-red sprays of branching flowers with pincushion centers nestled in papery bracts.

Intricate upright violet-red sprays of branching flowers captivate passersby. The pincushion-like centers are nestled in papery bracts. Nearly leafless flower stems rise above the lobed foliage. Whoo cant get enough of Astrantia? We cant!

Astrantia Midnight Owl is prized for fresh or dried floral arrangements. Picking flowers results in even more blooms. For added interest, bracts remain attractive even after the flowers fade. Masterwort have been cultivated in Britain since the 16th century.

Code ASMI

Patent Pending

Plant Type Perennials

Species major

Height Medium 18-24"

Spacing Plant 18-20" apart

Bloom Time Early Summer to Early Fall

Sun / Shade Full Sun to Half Sun / Half Shade

Zones 4-7

Soil Type Normal

Water Needs Medium

Sold In Plantable Pots (3.5x3.5x4")

Special Features

  • Beneficial for Pollinators
  • Attracts Butterflies
  • Good for Cut Flowers

Planting Sites

  • Wet Site Tolerant

Astrantia General Information

Flowerheads remain attractive for a long time. Astrantia is an old cottage-garden favorite, but works well in contemporary-style gardens, too. Perfectly suited towards the front of a mostly sunny site or at a woodland edge. Excellent filler plant and cut flower. Idaho has restricted all potted plant material from being shipped into Idaho at this time.

Astrantia Plant Care

Astrantia are happiest in a moist soil that drains well and would not be happy in a hot dry site. Remove spent flowers to prevent self-seeding. Can be cut back to new growth at base of plant if foliage declines in hot summers. Leave new basal growth for winter. Divide in spring or fall every 4-5 years.

Plantable Pots

Our plants are grown in 3.5x3.5x4” plantable pots. Made from 100% biodegradable coconut husk fibers (coir), these pots have tremendous advantages over plastic pots. With better air exchange, this "breathable" pot fosters robust root growth and reduces transplant shock since you can plant the pots directly in the ground. The pot naturally becomes part of the soil on its own over time—no composting required—and since they're made from a renewable resource that requires very little energy, they're earth-friendly too!

100% Guarantee

We offer a 100% unconditional guarantee for all our perennials to reach you in good condition and to grow. If you're not satisfied, we'll reship or refund immediately. Please don't hesitate to contact us if you have questions or concerns—we share your passion for gardening and want your new plants to thrive in your border!

Shipping Details

We use custom, earth-friendly packaging to make sure your order arrives in great condition, and we ship based on the best planting time for your growing zone (see the approximate dates below), unless otherwise indicated at checkout. If you wish, you can indicate a specific ship date during checkout.

Spring

  • Zone 3, 4: Early to Mid May
  • Zone 5: Late April to Early May
  • Zone 6: Mid to Late April
  • Zone 7: Early to Mid April
  • Zone 8: Late March to Early April
  • Zone 9, 10: Late March

Fall

  • Zone 2, 3, 4: Early September
  • Zone 5: Early to Mid September
  • Zone 6: Mid September
  • Zone 7: Mid to Late September
  • Zone 8, 9, 10: Late September to Early October