
Source: Wikimedia Commons
Popular grass-style bonsai. Large purple or white flowers capture waterside scenery in a small pot. Beautiful with moss, creating a seasonal display for early summer.
Iris ensata (Hanashōbu) and Iris laevigata (Kakitsubata), collectively known as Japanese water iris, are rhizomatous perennial plants in the family Iridaceae, native to Japan, China, and the Korean Peninsula. In the context of 'kusa-mono bonsai' (grass-style bonsai), these irises are planted in shallow water trays or on moss-covered slabs to evoke the atmosphere of a waterside landscape. The large, elegant flowers — in purple, violet, white, pink, and their combinations — appear in May to June and are among the most spectacular blooms in the bonsai calendar. Japanese water iris cultivation has a rich history; Hanashōbu alone has over 5,000 named cultivars developed across the Edo, Higo, and Ise regional traditions.
Origin
Japan, China, and the Korean Peninsula
Lifespan
5-10 years (renew by division)
Size
20-40cm
Temperature
-5〜35℃
Fertilizer (regular)
Full sun outdoors. Can keep in water tray during growing season
Loves water greatly. Never let dry out
Remove flower stems after blooming. Divide every 3 years
Prefers acidic soil. Watch soil composition when repotting
Beginner. This is a beginner-friendly species. No special equipment or experience is required, and it can be kept successfully with basic care setup.
The ideal temperature for Japanese Iris Bonsai is -5〜35℃. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Japanese Iris Bonsai is 5-10 years (renew by division). With proper care and nutrition, they can live a long and healthy life.
Japanese Iris Bonsai typically reaches 20-40cm as an adult. Size may vary depending on care conditions and individual genetics.
Japanese Iris Bonsai feeds on: Fertilizer (regular). Aim for a balanced diet with appropriate feeding frequency.
The price of Japanese Iris Bonsai varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Find listings for this species
Browse Bonsai ListingsComplete Beginner's Guide to Bonsai
Everything beginners need to start bonsai: choosing trees, soil and pots, watering, fertilizing, pruning, wiring, and recommended starter species.
Bonsai Species Encyclopedia — Popular Trees & Care Guide
An encyclopedia of popular bonsai tree species with styling, care difficulty, and seasonal changes for each.
How Much Does Bonsai Keeping Cost? Monthly Running Costs Explained
Monthly bonsai care costs: soil, fertilizer, wire, tools, and pots, with starter budget estimates for beginners.
Bonsai Growth Timeline — How Long Does It Take by Species?
Bonsai growth timelines by species: seed and cutting development, growth rates for popular species, and styling acceleration techniques.