Pruning. Extremely little maintenance is required of astilbe plants. The flower heads will dry on the plant and remain attractive for many months. The flowers can be cut whenever they start to look ragged, or left up for winter interest and cut back in the spring.

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 do you keep astilbe blooming?

Provide a slow-release fertilizer with a ratio of 3-1-2 in spring, and then feed the plant a high-nitrogen fertilizer when the plant is setting buds in late summer or early autumn. If possible, amend the soil regularly with compost or well-rotted manure.

How do you maintain astilbe?

All astilbes, even the more drought-tolerant varieties, prefer cool, moist soil rich in organic matter. Keep the soil evenly damp but not soggy, especially during the winter when plants are dormant. Avoid planting in heavy clay soils and sites with poor drainage.

Should you cut astilbe flowers turning brown?

Astilbe foliage generally holds up well through the growing season, as long as the plants are adequately watered during dry spells. If individual leaves turn yellow, brown or wither, they should be pruned. Following this pruning, you should get fresh growth in the spring.

How to Deadhead Astilbe

What do I do with astilbe after flowering?

Astilbes are easy to care for, provided they're growing in the right growing conditions. They don't need deadheading. Simply cut back plants after flowering and divide every three or four years.

Why are my astilbe turning brown?

The most common cause of browning astilbe is poor conditions. Astilbe thrive in moist conditions with soil that drains well and partial shade. Make sure you water astilbe plants regularly and don't let them get too much direct sunlight. Use mulch to keep water in the soil but avoid soggy soil.

Does astilbe need fertilizer?

Astilbe is a perennial and it really only needs a yearly application of a basic slow release flowering perennial fertilizer. Flowering plants need phosphorus to bloom, so look for a fertilizer for astilbe plants with a middle number that's at least as high as the other two numbers, like 5-10-5 or 10-10-10.

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.

Should astilbe be cut back after blooming?

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. After the first frost, the leaves may yellow; trim leaves if you wish and fresh growth will come next spring.

How do you keep astilbe blooming all summer?

Take good care of your new astilbe plants. Do not plant them in full sun. After a few years, you will need to divide them in the fall when they start to get crowded. Treat them right and you will have astilbe plant blooms all summer long.

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).

How do you divide an astilbe plant?

Remove the astilbe plant from the soil, keeping the root ball attached to the plant. Slice through the roots with a sharp shovel blade, cutting from the top. Create at least four transplants from each plant. Replant each in a prepared hole, then repack the soil around it.

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.

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.

What compost is best for astilbe?

We recommend using a John Innes compost which is soil-based and will retain moisture better which astilbes like.

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 do you winterize astilbe?

To winterize astilbes and other herbaceous perennials, a gardener removes all stems and foliage down to the soil level in the autumn and tucks the roots in for the winter under a blanket of mulch. Use the garden shears to cut the astilbe stems and foliage back to approximately 3 to 4 inches above the soil level.

Will my astilbe come back?

Astilbe are perennials. They bloom in the spring until late autumn and then they'll naturally turn color and drop all their leaves. When cared for over the winter, they'll come back in the spring and bloom again. Cut back for the best blooms next season.

Why is my astilbe yellow?

Powdery mildew and cercospora leaf spot are two astilbe plant diseases that are fungal in origin. ... If you don't treat the powdery mildew, the plant's leaves may yellow and die back. Powdery mildew is one of the astilbe diseases that can eventually kill the plants.

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.

Do slugs eat Astilbe?

Slugs and snails love tender, succulent leaves so choosing plants with leathery, stiff or aromatic leaves can really lessen the trouble you will have. ... Most woody plants and ornamental grasses are quite resistant. Astilbe Light and airy flower clusters, 1-3 ft.

Can you take cuttings from astilbe?

You can successfully propagate by division which is the best way and this can be done in either Autumn or our prefered time, the beginning of Spring.