How to Plant Dwarf Iris Bulbs

When to plant:

Dwarf iris are fully hardy bulbs that happily withstand winter outdoors without
the need for frost protection. For the best results, plant them between
September and mid-November. If you can’t plant them immediately after receiving
them, store the bulbs in a cool, dry place for a short time. Be sure to plant
before late November, as dwarf iris bulbs do not store well into the following
year.

Where to plant:

These petite irises are perfect for borders, rock gardens, stone planters, and
patio containers. They also look striking in gravel gardens, where their
delicate blooms stand out beautifully. Choose a sunny spot for the strongest
flowers, though they will also tolerate partial or dappled shade.

Soil requirements:

Dwarf iris bulbs prefer well-drained soil. If your garden soil is heavy or
clay-rich, improve it before planting by mixing in compost and adding grit or
sand to encourage better drainage. For containers, use a good-quality peat-free
multipurpose compost.

How to plant dwarf iris bulbs:

Plant bulbs 5–10 cm deep with the pointed side facing upwards. Space them
around 5–10 cm apart. In beds and borders, planting in clusters or groups will
create a stronger visual impact than single bulbs scattered apart.

After planting:

Cover the bulbs back over with soil or compost and gently firm them in. If the
ground is dry, water lightly to help them settle. Through winter, dwarf iris
require little to no watering unless conditions are unusually mild and dry. In
spring, provide water only during warm, dry spells.

Aftercare:

Once flowering is over, allow the foliage to naturally yellow and die back, as
this process feeds the bulb for the following year’s display. Since dwarf iris
leaves are fine and grassy, they often fade discreetly into the garden and may
not need trimming unless they appear untidy. Bulbs can safely remain in the
ground year after year, where they will return each spring with their
jewel-like blooms.