Iris no Oka (Iris Hill)

Overview & Charm

Iris no Oka is a renowned flower park in Annaka City, Gunma Prefecture, often called a 'Flower Paradise.' Spanning a vast area of approximately 3 hectares, this elevated hill is home to a diverse collection of plants, including German Iris, Daylilies, and Dahlias. The park features a unique collection of rare plants, including seeds imported from around the world and original varieties developed in-house. The landscape is designed to utilize the natural terrain, creating a beautiful gradient of colors that changes with every season.

History & Cultural Background

The park is dedicated to exploring botanical diversity through the cultivation of high-quality plants. It is particularly famous for its German Iris, often called the 'Rainbow Flower,' boasting a scale of 1,000 varieties and 100,000 plants. To preserve the natural essence of the landscape, the park avoids artificial elements like asphalt paving or man-made fences, ensuring a harmonious environment where visitors can feel truly connected to nature.

Main Highlights

The park is divided into several areas, each featuring distinct botanical characteristics:

• *German Iris Garden**: From early May to early June, enjoy a pastel-colored landscape of 1,000 varieties and 100,000 plants.
• *Daylily Garden**: From late June to mid-July, witness 1,500 varieties and 200,000 Daylilies. The flowers look particularly magical in the morning after a rain.
• *Dahlia Garden**: From September to early November, the park is adorned with 500 varieties and 4,000 charming, rounded Dahlias.
• *Rainbow Garden**: A space featuring over 500 varieties of seasonal flowers, allowing visitors to experience the changing seasons even outside the main bloom periods.
• *Specialty & Wildflower Areas**: Includes areas for Dahlias, Bellflowers, Peonies, Phlox, and Poppies, as well as a wildflower area where seeds are scattered naturally.

Seasonal Recommendations

The best time to visit depends on the flowers you wish to see:

• *Early May to Early June**: Peak season for German Iris, painting the hill in vibrant colors.
• *Late June to Mid-July**: Peak season for Daylilies, especially beautiful in the morning dew.
• *September to Early November**: Peak season for Dahlias, bringing a sense of elegant autumn color.

Experiences & Activities

Visitors can explore the park at their own pace along various paths. The natural slopes of the hill provide unique vantage points for viewing the flowers from different angles. You can also purchase fresh-cut German Irises or potted plants at the onsite shop. Whether you are visiting for a family outing, professional photography, or a peaceful solo retreat, the park caters to all needs.

Surrounding Area

Iris no Oka is conveniently located near famous hot spring destinations like Ikaho Onsen and Isobe Onsen, as well as the historical Tomioka Silk Mill and Karuizawa area. It is a perfect stop to include in a broader Gunma sightseeing itinerary.

Essentials & Etiquette

As the park utilizes natural terrain, some areas are unpaved. We highly recommend wearing comfortable walking shoes.

• *Payment**: Please note that cash is the primary method of payment.
• *English Support**: Availability of English-speaking staff and signage may vary by season.
• *Reservations**: No advanced reservation is required, but we recommend checking the blooming status before visiting.
• *Pets**: Pets are welcome to join your stroll.
• *Parking**: Free parking is available, including space for large tour buses.