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Iris Bulbs & Rhizomes

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Gardeners are drawn to Irises for their beauty and are available in almost every color of the rainbow. K. van Bourgondien is the best place to buy Iris bulbs and rhizomes online, and we offer a wide selection of iris flowers for sale that will transform your early summer landscapes. This late-spring blooming flower comes in many shapes and sizes and will not disappoint. Check out our irises today!

Iris Rhizomes & Iris Flower Bulbs for Sale

At K. van Bourgondien, we believe gardening success starts with healthy, high-quality bulbs and the best flower varieties. For over 175 years, we've supplied gardeners and horticulture professionals with top-quality products from Holland and, in later years, the United States. We offer high-quality Iris bulbs for sale that will brighten up your garden. We guarantee that when you buy iris bulbs online from us, you can count on high-quality products.

Which Irises Should I Buy?

When choosing which iris bulbs to buy, consider their size, color, bloom times and where you'd like to plant them. Purple iris are the most popular color, but iris flowers are available in a wide range of colors. Japanese, Siberian and Louisiana iris are top choices for planting near streams and ponds. Siberian iris are the most cold hardy, and Louisiana iris are the best for warmer climates.

Selecting Iris by Flowering Season

You can extend the iris season by planting a variety of iris. When do irises bloom? Dwarf iris start the iris season when they bloom in early spring. They're followed by German iris (late spring), Dutch iris (late spring/early summer), Japanese iris (early summer), Siberian iris (early summer) and Louisiana iris (early to midsummer).

Getting Started with Iris Bulbs

Iris bulbs are low-maintenance and easy-care perennials. Most iris like full sun, though most can handle partial shade. Like most plants, they prefer well-drained soil. Japanese, Siberian and Louisiana iris are favorites for planting near water features, while German Iris are best for handling drier conditions and like good air circulation. Knowing when to plant iris bulbs and the best time to plant iris are keys to successfully growing iris.

When to Plant Iris Bulbs

Dutch and Dwarf Iris bulbs are planted in the fall. German (bearded) iris can be planted in the fall and spring. Japanese, Siberian and Louisiana iris plants are planted in the spring.

Where to Plant Iris Bulbs

Iris are standouts in mixed perennial flowerbeds, naturalized areas, mass plantings and along streams or ponds. Most prefer full sun and well-drained soil.

How to Plant Iris Bulbs

For Dutch iris bulbs, dig a hole about 4 inches deep and space bulbs about 3-6 inches apart. For Dwarf iris bulbs, plant 2 inches deep, 3-4 inches apart in clumps of 4-6. A general rule of thumb for how deep you plant iris bulbs is that the depth should be three times the diameter of the bulb.

How to Plant Irises in Other Forms

When planting iris rhizomes, plant horizontally with the roots going down and with the eye just below the soil surface. Do not mulch over the rhizomes.

When planting other iris types, dig a hole that will accommodate the roots and position the plant so that where the roots meet the stem is about 1 inch below the soil surface.

How to Grow and Care For Irises

Our iris bulbs and rhizomes for sale can last for years and years. Gardeners should use perennial fertilizer or bulb fertilizer, depending on the type of iris, to lightly fertilize irises annually. For irises grown from bulbs, use K. van Bourgondien 100% Natural Bulb Food and for irises grown from rhizomes and plants, use K. van Bourdondien 100% Natural Perennial Food. Many irises are divided every 3-5 years. For more details on iris, visit our Iris Care Guide.
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