Dutch Irises

Dutch irises have been and still are an inspiration for artists and painters around the world.

There are around 260 species of irises that are available, one being the true bulbs we call Dutch irises. These stunning blooms are amongst some of our favourite bulbs and it is now time to order and get them growing in the garden or pots. In the Southern Hemisphere, plant from mid-April to mid-June for flowering in spring (September and October). They will reach 40-90cm tall when in full bloom.

What they need

• Full sun or partial shade. In very hot areas rather go for partial shade.
• Soil that is well-draining with plenty of added compost.
• Mulch after planting with more compost.
• Plant at a depth of 5cm with a 7cm space between each bulb. The pointed end must face upwards.
• They will be fine throughout the winter and will tolerate temperatures not lower than 0°C.
• When the foliage emerges in spring increase watering to once a week until they start to die back, then stop watering. Water bulbs in pots more frequently.
• Feed regularly when you see the plants are shooting with a liquid plant food, or use a bulb food.
• Once the foliage starts to yellow in November, they can be lifted and stored for the following season. Extra bulblets that form on the side of the main bulbs can be divided and planted the following season.
• Watch out for snails, slugs, thrips and aphids.

Why is it called a Dutch iris?

Originating from the place that is known as the flower bulb capital of the world, The Netherlands, the Dutch iris (Iris hollandica) is a cross between a Spanish iris, Iris xiphium and a North African iris, Iris tingitana.

By doing this, the Dutch bulb firm, Van Tubergen was able to produce bigger flowers with an earlier blooming time. This original true blue variety has since been crossed with other varieties to produce other colours including white and yellow.

READ MORE: Learn about other types of irises in this article.