Astilbe arendsii Sister Theresa

Perennial Spirea

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Plant Code: ASST

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‘Nun’ can compare with the sturdy compact salmon-pink triangular plumes rising over dark green lacy foliage. We ‘confess’ dense foliage remains attractive throughout the season. Attractive planted in ‘mass’. We promise we won’t make these puns a ‘habit’!

Astilbe arendsii are a group of hybrids developed by famed German nurseryman George Arends. They combine well with other moisture loving plants – Brunnera, Ligularia, Hosta and Ferns.


Type: Perennials
Height: Medium 24"
Spacing: Plant 16-20" apart
Bloom Time: Early Summer to Mid-Summer
Sun-Shade: Half Sun/ Half Shade to Full Shade
Zones: 4-8   Find Your Zone
Soil Condition: Normal, Clay, Acidic
Flower: Pink
Accent: Pink
Pot Size: 3.5" square x 4" deep

Features to Note

  • Attracts Butterflies
  • Deer Resistant
  • Attracts Hummingbirds
  • Rabbit Resistant
  • Shade Tolerant
  • Wet Site Tolerant

Astilbe General Information

Astilbe lend a refined grace to perennial borders. Perfect for the shade garden along with Hostas and Ferns. Lush deeply cut foliage is attractive for the entire season and is colored from green to bronze. Effective anywhere with rich moist soil and partial shade.

Astilbe Plant Care

Low care. Needs moisture during dry spells. Dried heads can be left standing if desired or cut down at anytime. Can be divided every 3-5 years in early spring. Cut through woody crowns to separate eyes to form additional plants. Add fertilizer or compost if desired when planting or moving and in late fall to winter.