How to plant Bulbous Iris

Bulbous Iris are among the earliest of the spring blooming bulbs, often emerging through the snows of late winter.

Their striking colors are a sure sign spring is on its way. Bulbous iris includes Iris hollandica or Dutch iris, Iris histrioides or Dwarf iris, as well as Iris reticulata, often called miniature iris. Of these, Iris histrioides will bloom first in the spring, followed by Iris reticulata, then the Dutch irises. 

Dutch Iris are available in shades of white, purple, yellow and blue.

‘Katherine Hodgkin’ is a popular Dwarf Iris.

‘Harmony’ is the choice for Iris reticulata.  Late September into October is the time to plant bulbous iris.

Unlike bearded iris which are planted from rhizomes, bulbous iris are planted from teardrop shaped bulbs.

Bulbous iris displays best when planted in bunches, rather than single bulbs. Select a site in the garden that will receive full sun.

Once you’ve selected a sunny site, plan to add 2 inches to 3 inches of compost or peat moss to your existing soil, then mix it in thoroughly.  While you're at it, work in some Dutch Bulb Food.

Used at planting time, Dutch Bulb Food provides the nutrients necessary to promote good root development.

Plant your bulbous iris point end up about 4 inches deep, then cover with soil. After planting, water the bed thoroughly.  Your bulbs will start rooting right away. As the temperatures cool down, the bulbs will go dormant. When the soil warms up in the spring, your bulbous iris will wake up and begin to grow and bloom. After flowering, the foliage will fade away and the bulb will remain dormant until the following spring. Once in place, your bulbous iris should bloom for many seasons.