perennial · design plant record

Astilbe japonica

Japanese astilbe

Flower plumes bring an early-summer vertical accent to a shaded bed.

Height at maturity

0.46–0.77 m (1.5–2.5 ft)

Spread at maturity

0.46–0.77 m (1.5–2.5 ft)

Light

Part shade / Shade

Moisture

Moist, draining soil

Source-reported USDA zones

4–9 · verify subzone and cultivar

Principal seasonal role

Spring, Summer

Fit it to the site

Rich, moist, draining soil in partial to full shade.

Reject a dry root zone. A range of astilbe flowering seasons does not mean this species flowers continuously until autumn.

Keep the care in the decision

Keep moisture reliable and inspect crowns as clumps expand. Division can renew crowded groups. Confirm the flowering period of the named cultivar.

Origin & safety checks

Japan. Garden cultivars vary.

Toxicity not assessed; no edible-use or pet-safety certification.

Check current invasive restrictions with your local plant-health or extension authority. For pets, use the exact botanical name in a veterinary toxicity reference; for potential ingestion or exposure, get appropriate professional advice rather than relying on a design guide.