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Flower Bulbs & Perennials at Wholesale Prices
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German Iris Coal Seams

German Iris Coal Seams

Aptly named iris has very large, dark and velvety flowers that have just a few slight white rays.

Paint your client's gardens with incredible color that towers high and will surely catch their eyes! We have 4 brand new varieties in a cornucopia of colors, flower forms and foliage that flourish in full sun.
  • Hardiness Zones 4-9
  • Mature Height 41 inches
  • Bloom Time Mid to late spring
  • Light Requirements Full Sun, Half Sun / Half Shade

We ship this item in Fall

Botanical Name: Iris germanica Coal Seams


#70968

Availability: Out of Stock

Plant Spacing Calculator Packed 5 per bag
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Product Details

  • Restricted States US:

    AE AK GU HI PR
  • Botanical Name :

    Iris germanica Coal Seams
  • Ship As :

    Bare Root
  • Size :

    NO.1
  • Suggested Uses:

    Borders, Bouquets, Cut Flowers, Perennializing, Showy Flowers
  • Flower Color :

    black
  • Flower Form :

    5.5" flowers which are well balanced and proportioned
  • Foliage Type :

    Blue-green sword-shaped leaves
  • Mature Spread :

    18 - 24 inches
  • Spacing:

    24 inches

Growing Tips

  • Planting Instructions :

    Plant with top half of the rhizom exposed
  • Soil Moisture :

    Well drained soil. Vigorous grower which requires generous feeding if soil is not fertile. At least 5 hours of sunlight each day. Water during dry periods. Avoid water-logged soils.
  • Will Tolerate :

    Acidic Soil, Clay Soil, Loamy Soil, Sandy Soil
  • Pruning Instructions :

    Cut off dead blooms. Cut back foliage to fan size in late fall. Clean up plant debris before winter to prevent borers from overwintering.
  • Winter Care :

    Mulch in colder climates and remove in early spring before growth starts.
  • Planting Depth :

    Plant with top half of the rhizom exposed
  • Watering Requirements :

    Average. Do not let the soil dry out completely during spring and summer. Plants are quite drought-tolerant
  • Fertilization Requirements :

    Once a year
  • Special Care :

    Not needed

Plant Calculator

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Shipping Information

K. Van Bourgondien & Sons, Inc. times its shipments from Holland so that bulbs arrive at the proper planting time (depending on climatic conditions) for each area of North America.

We take advance reservations, and then just as soon as the crops are harvested, our staff of K. Van Bourgondien & Sons, Inc. experts makes an on-the-spot selection of the finest bulbs available to fill those reservations.

We will pack and ship your order based on the following schedules.



Fall Shipping Schedule
Zones Product First Ship Date Last Order Date
All Zones Bulbs, Perennials September 18, 2017 December 11, 2017
All Zones Amaryllis and Paperwhites October 9, 2017 December 26, 2017
3-7A German Iris, Fall Crocus, Colchicum August 14, 2017 October 27, 2017
7B-10B German Iris, Fall Crocus, Colchicum August 21, 2017 October 27, 2017


In all cases, we choose the fastest, most efficient way to send your orders via USPS or FedEx.

Shipping Note:

Orders for gift certificates will be shipped immediately.

Due to hot weather conditions, we are unable to ship any plant items from late June through August. General merchandise will be shipped with your plant order.

The type of product you order or the weather in our area or yours may affect the anticipated shipping schedule.

Large orders may be shipped in more than one package.

Your order confirmation will have an estimated delivery time.

When your order is actually shipped you will be sent an updated delivery estimate.

You may check your order status at any time on this website using your email or account number provided on your order confirmation.

Please note that we cannot ship outside of the 48 contiguous states.


Click here for zone map.


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