Astilbe Flower Bulbs

Astilbe Flower Bulbs

4 varieties

4 products

Learn how to plant

How to Plant Astilbe Flower Bulbs

Fast Facts

Planting season
Spring
Life cycle
Perennial
Light
Partial Shade
Water needs
Average
Planting depth
Top of the root should be 1 inch below the soil line
Spacing
18 to 24 inches
Mature height
12 to 24 inches, 24 to 36 inches, 32 to 40 inches
Hardiness zones
3 to 8
Bloom season
Summer through Late Summer

Ranges cover every variety in this group. Check the product page for the exact figures.

About Astilbe Flower Bulbs

Astilbe Flower Bulbs grow in partial shade positions. Flowering runs summer through late summer. The figures below are the ones on the packets in this group; each product page carries the exact numbers for that variety.

When to plant

Plant in spring. Bulbs go in while the soil is still workable, and want to be in the ground long enough to settle before it freezes. Hardy in zones 3 to 8 — your local frost dates decide the exact week.

Where to plant

Choose a site in partial shade. Water needs are average once the plants are established. Drainage matters more than anything else: bulbs sitting in wet winter soil rot. Allow 18 to 24 inches between plants so air can move between them.

How to plant

Set the bulb top of the root should be 1 inch below the soil line deep, pointed end up, spaced 18 to 24 inches apart. Water gently to settle the soil, then keep the surface evenly moist until seedlings or shoots appear.

How to care

Keep watering average, at the base of the plant rather than over the leaves. In zones 3 to 8 these come back each year: let the foliage die down naturally after flowering, since that is what feeds next season's growth. Flowers appear summer through late summer; cutting or deadheading regularly keeps more coming.

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