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Astrantia Planting Guide

Plant a garden that's out of this world with the bright, twinkling blooms of Astrantia! Native to mountain meadows, woodlands, and along the stream banks of Europe, these brilliant, dome-shaped flowers arrive on long, wiry stems atop rosettes of lush, maple-like leaves. As one of the most eye-catching of all summer species, Astrantia are fantastic for cutting and ideal for partially shaded garden spaces where the soil remains moist. Plus, they're exceptionally pollen-rich, making them very attractive to pollinators. Learn more about how to grow and care for these sparkling plants below!

Success Snapshot

PLANTING
DEPTH

1"

WATER
QUANTITY

Moderate

SUNLIGHT
QUANTITY

Partial Sun

PLANTING
PROXIMITY

18-24" Apart

BLOOM
SEASON

Early Summer through Fall

HARDINESS
ZONES

Zones 4-7

Where to Plant

Astrantia is a very adaptable plant that will grow well in full sun, given plenty of water, or in full shade, where the foliage is lush and the blooms are sparse. Ideally, these bountiful blooms should be planted where they will receive a few hours of morning light, with dappled shade the rest of the day. While Astrantia easily withstands the harsh winters of the north and midwest and a wide range of growing conditions throughout the country, it does not fare well with the south's combined heat and humidity. Additionally, they tolerate heavy clay soils but prefer slightly acidic, rich, loamy soils that retain moisture but drain off standing water. They're perfect for mass plantings and remarkably easy to grow in containers as well!


When to Plant

Bare root Astrantias are best planted in the early spring or early fall. They typically bloom profusely from early to mid-summer right through to early fall, dying back naturally in the winter.


How to Plant

  • Find a location where your Astrantia will receive a few hours of morning light, with dappled shade the rest of the day. For the best growth and performance, Astrantia should be planted in partial sun or dappled shade. Make sure there is a little extra room as Astrantia clumps will slowly spread out as they mature.
  • Dig a hole and plant your bare root Astrantia in slightly acidic, rich, loamy soil that retains moisture but drains off standing water with the crown 1/2 to 1" below the surface and the roots spread out.
  • Fill in the hole with loose soil and avoid packing it down too tightly.
  • Water well after planting to gently soak the soil and settle it around the roots.

How to Grow

  • Water regularly and thoroughly to support a reasonably even soil moisture. Astrantia will not survive sustained periods of dry soil.
  • Apply a layer of mulch to your newly planted roots to help maintain even moisture.
  • Deadhead or remove spent blooms to encourage continued bloom production throughout the season.

Astrantia Tips & Tricks

  • Incorporate compost, dried leaves, even used coffee grounds into your soil for more organic nutrients. Coffee grounds will also add enough acidity to the soil for your Astrantia to be perfectly happy.
  • Feel free to snip the flowers when in bloom for long-lasting bouquets.
  • Expect your Astrantia to shrug off the winter blues and be ready to grow and bloom the following year.
  • Dry the clusters of colorful, intricate blossoms for beautiful winter interest.
  • Dig up and divide Astrantia clusters every 4–5 years.