Dutch iris are fully hardy perennial bulbs, tolerating temperatures down to -15C. This means that they can be planted directly outside in the spring in most areas.
— Plant directly into a clear, well-dug space in a border between March and May. You can also plant them straight into patio containers.
— Dutch iris like a free-draining soil but can also tolerate soils those with clay content. Choose a position which is in full sun or partial shade.
— Plant the bulbs with pointed side facing upwards, around 10-15cm deep in borders or patio containers.
— Space the bulbs around 5-10cm apart from each other.
— If planting in patio containers, it’s best to use soil-based compost or multipurpose with added loam.
— Water-in after planting and continue to water regularly when in growth in the first year. Once established, they will not usually require additional watering unless it is very dry.
— Remove the flower stems after flowering and cut back foliage to ground level in autumn. They bulbs can stay outdoors in their planted positions without any frost protection.