Growth Habit: Astilbe is a clump-forming perennial with fern-like leaves and tall flower stalks with plume-like flowers. Plants range in size from 1 to 4 feet tall. Astilbe looks best planted in groups and some low growing types make excellent ground covers.

How quickly does Astilbe grow?

Expect root growth to begin almost immediately after planting. In warm climates, top sprouts will form within a few weeks; in cool climates sprouts will emerge in the spring. Plant your roots in the fall 8 weeks before hard frosts typically occur in areas with winter temperatures that drop below freezing.

Do astilbe bloom more than once?

Astilbes bloom between late spring and late summer. They flower over a fairly long season since each flower plume consists of hundreds of densely packed tiny flowers, opening in succession. However, they do not all flower at the same time and are classified with a blooming time, ranging from Early to Late season.

What is the tallest Astilbe?

Astilbe chinensis var. tarquetii 'Superba' is one of the tallest varieties of Astilbes and always creates a dramatic statement in the garden, with its stunning, purple-rose, lance shaped flower plumes rising up to 4-5 ft high (120-150 cm).

Do astilbe plants come back every year?

Astilbes are reliable perennials, but they do benefit from being divided every few years. This will regenerate your plant and increase your stock. Divide astilbes in the autumn after flowering or in early spring. Pot up your divisions before planting out.

Growing Perennials: Astilbe

How far apart should astilbe be planted?

Planting: Plant astilbe 18 to 24 inches apart, and water in well.

Is astilbe an invasive plant?

Astilbe spreads via underground rhizomes and can eventually develop into a large patch, though it is not considered invasive. It dies to the ground completely in winter, but the roots are very cold hardy. In general, astilbe excels in cold, moist climates and is more challenging to grow in hot, dry places.

How many astilbe Can I plant together?

Like most perennials, astilbes look their best in groups of three or more plants of the same color.

Is astilbe a sun or shade?

When & Where to Plant Astilbe

Light: Astible grows best in part shade. It can thrive in full sun, but will need shade in the afternoon in hot summer climates. In full shade, flowering will be reduced. Soil: Astilbe thrives in moist, well-drained soil that has a slightly acidic pH (6.0).

What can I plant next to astilbe?

There are quite a few plants that meet these astilbe companion planting qualifications. Rhododendrons, azaleas, and hostas all prefer shade and grow in a very wide range of hardiness zones.
...
Ideas for Astilbe Companion Plants

• Ferns.
• Japanese and Siberian iris.
• Trilliums.
• Impatiens.
• Ligularia.
• Cimicifuga.

Should I deadhead my astilbe?

Deadheading astilbe won't encourage new flowers, so you should leave them in place through the fall. Eventually, the flowers will dry on the stalks but should stay in place. ... It makes astilbe winter care a little easier, and all new growth will come back to replace it in the spring.

How long does it take astilbe to flower?

Early blooming varieties begin to flower in late May or June while late bloomers begin in late July or early August. By selecting several varieties with different bloom times, the floral display can be extended over 2 or 3 months. Astilbes also vary greatly in height.

Should you cut back Astilbe?

Astilbe do fine as cutting flowers if you wish to clip some blooms to bring inside. Removing the flower heads will not promote continued flowering. After blooming has finished for the season, feel free to clip off any spent flower stems. Your astilbes will continue to provide attractive foliage until fall.

Do astilbes dieback in winter?

Astilbe are a herbaceous perennial which means they die back to bare earth over winter and re grow each spring.

Does astilbe like wet soil?

Astilbe (Astilbe simplicifolia) – One of my favorite astilbes is 'Sprite' because of its unique airy, shell-pink flowers and dark, bronze-green foliage. Prefers moist, humus-rich roil.

Does astilbe like shade?

Lovers of rich, moist soil, astilbes surprise you with their sheer vibrancy and range of flower and foliage combinations. These hardy perennials are happy in sun or shade, adding drama to bog gardens, damp borders and even containers.

Will astilbe grow under trees?

Astilbe can also be grown under tall deciduous trees such as maple and oak. However, because of their need for soil moisture, they may not thrive in these locations as they try to compete with the trees' root systems for water. They make a better transition plant.

Does astilbe multiply?

Astilbe are shade-tolerant plants with average moisture needs. ... They grow up to 5 feet (1.5 m) tall and they can multiply quickly, so it is important to divide your astilbe regularly.

Are astilbe poisonous to dogs?

Bright Blooms

As long as the astilbe plants get limited sunlight and have moist soil, they can bloom throughout the summer months. ... Both astilbe and yellow corydalis are non-toxic to dogs.

What does astilbe attract?

Yes, astilbe attracts bees, butterflies and moths.

Why are my astilbe dying?

Astilbes begin to wilt, sometimes quickly, when they're exposed to too much sun. The hot summer sun can also heat up and dry out the soil. Another symptom of too much sun is leaf scorching; the edges of the leaves may appear burnt or begin to shrivel.

What does astilbe symbolize?

Astilbe flowers are a symbol of patience and dedication to a beloved one. If you give this flower away, you give the promise that you will be waiting for this person. The flower is long blooming, this symbolize the dedication to the loved one. Not for nothing, is this flower popular at weddings.

How do I get rid of Sorbaria?

If you decide to leave the bush in place but want to control its spread, prune it hard in the early spring, just before the buds start to come out (as it blooms on new growth) and watch for (then dig out) those suckers!

Do astilbes spread?

Most astilbes spread easily, so divide your plants every 3 to 5 years to prevent overcrowding and to keep them vigorous and healthy. Cover the root zone with a layer of bark chips or other mulch to help retain moisture in the soil and hold down any competing weeds.

How much does astilbe spread?

A flowering perennial that reaches heights ranging from one to six feet, astilbe spreads via underground rhizomes. It's a relatively slow-growing perennial that will fill in a space that you've chosen for it nicely, when given enough time.