Source: Wikimedia Commons
Japanese Iris Bonsai
BeginnerIris ensata
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.
About
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.
Basic Info
Origin
Japan, China, and the Korean Peninsula
Lifespan
5-10 years (renew by division)
Size
20-40cm
Temperature
-5〜35℃
Watering & Fertilizer
Fertilizer (regular)
Growing Tips
Placement
Full sun outdoors. Can keep in water tray during growing season
Watering
Loves water greatly. Never let dry out
Styling
Remove flower stems after blooming. Divide every 3 years
Notes
Prefers acidic soil. Watch soil composition when repotting
Japanese Iris Bonsai FAQ
QWhat is the growing difficulty level for Japanese Iris Bonsai?
Beginner. A variety suitable for beginners. No special equipment or experience is required—you can grow it without problems by setting up a basic cultivation environment.
QWhat is the ideal temperature for Japanese Iris Bonsai?
The ideal temperature for Japanese Iris Bonsai is -5〜35℃. Avoid sudden temperature changes and maintain a stable environment.
QWhat is the lifespan of Japanese Iris Bonsai?
The average lifespan of Japanese Iris Bonsai is 5-10 years (renew by division). With proper cultivation environment and nutrient management, you can keep it healthy for a long time.
QHow large does Japanese Iris Bonsai get?
The mature size of Japanese Iris Bonsai is 20-40cm. This may vary slightly depending on cultivation environment and individual differences.
QHow should I water and fertilize Japanese Iris Bonsai?
Japanese Iris Bonsai: watering & fertilizer — Fertilizer (regular). Aim for appropriate frequency and amount.
QWhat is the typical price for Japanese Iris Bonsai?
The price of Japanese Iris Bonsai varies significantly by variety, characteristics, size, and lineage. Please check ボタちょく's price guide for the latest market information.
Last updated: June 24, 2026
Growing Specifications
- USDA Zone
- 4–9
Sources: NC State Extension: Iris ensata
References & Sources
Edited & verified by: BoTachoku Editorial Team
The classifications, regulations, and growing data on this page are created and verified based on the primary information database below.
Taxonomy & Authority
Regulations & Conservation Status
Sources: CITES Checklist of CITES Species
Regulations may change. Always verify the latest information with the relevant authorities.
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