Iris reticulata 'Blue Planet' is a beautiful dwarf spring iris producing elegant pastel-blue flowers with deeper blue detailing and a contrasting yellow flash on the falls. Compact and early flowering, it is an excellent bulb for rock gardens, gravel planting, the front of sunny borders and spring containers.

Growing to just 10-15cm tall, 'Blue Planet' provides colour close to ground level when relatively few other garden plants are in flower. Its delicate blooms emerge alongside narrow, upright foliage, creating a neat display that works particularly well when the bulbs are planted together in groups or informal drifts.

• Botanical name: Iris reticulata 'Blue Planet'
• Common name: Reticulated Iris / Dwarf Iris
• Plant type: Bulbous perennial
• Flower colour: Pastel blue with yellow markings
• Flowering time: February-March
• Height: Approximately 10-15cm
• Spread: Approximately 5-10cm
• Position: Full sun
• Soil: Fertile, very well-drained soil
• Ideal for: Rock gardens, gravel gardens, borders and containers

About Iris reticulata 'Blue Planet'

Iris reticulata is one of the earliest groups of Iris to flower, often appearing while the garden is only beginning to emerge from winter. 'Blue Planet' is particularly attractive for its softer colouring, with flowers in delicate shades of powdery or pastel blue rather than the deeper violet-blue commonly associated with dwarf irises.

The broad falls carry a vivid yellow signal surrounded by deeper blue markings, helping to emphasise the intricate structure of each flower. Upright standards rise above them, giving the blooms the unmistakable architectural form of an Iris despite their diminutive size.

Early Spring Colour

'Blue Planet' usually flowers during February and March, depending on weather and local conditions. This early season makes it particularly valuable alongside crocuses, snowdrops, dwarf narcissi and other bulbs that provide colour before the main spring display begins.

Although each plant is compact, a group of bulbs creates an impressive patch of blue. Planting ten or more together can produce a particularly effective display in a border or container.

Where to Plant Iris 'Blue Planet'

Choose a position in full sun with excellent drainage. Reticulated irises naturally prefer conditions where the soil is moist during active spring growth but becomes relatively dry during summer dormancy.

Rock gardens, raised beds and gravel gardens are particularly suitable. They can also be planted towards the front of sunny borders where their small flowers will not be hidden by taller plants.

How to Plant Iris reticulata Bulbs

Plant the bulbs in autumn approximately 8-10cm deep and around 5-10cm apart. Position each bulb with the pointed growing tip facing upwards.

For the strongest visual impact, plant them in groups rather than individually. If your soil is heavy or prone to holding water, mix in horticultural grit before planting to improve drainage around the bulbs.

Growing 'Blue Planet' in Containers

The compact dimensions of 'Blue Planet' make it an excellent bulb for pots, troughs and alpine containers. Use a free-draining compost and ensure containers have unrestricted drainage holes.

Several bulbs can be planted relatively closely together to create a concentrated spring display. They combine particularly well with small crocuses, dwarf narcissi and other miniature spring bulbs.

Height and Spread

Iris reticulata 'Blue Planet' reaches approximately 10-15cm tall when flowering, with individual plants spreading around 5-10cm. Established bulbs may gradually increase to form small clumps when grown in suitable conditions.

After Flowering

After flowering, leave the narrow foliage in place and allow it to yellow and die back naturally. The leaves continue to feed the bulb and build up energy for the following year's flowers.

Once the foliage has completely died back, the bulbs enter summer dormancy. A relatively dry resting period is beneficial and helps reduce the risk of the bulbs rotting.

Why Grow Iris reticulata 'Blue Planet'?

• Delicate pastel-blue flowers
• Contrasting yellow markings on the falls
• Flowers very early in spring
• Compact height of only 10-15cm
• Spread of approximately 5-10cm
• Excellent for rock and gravel gardens
• Ideal for pots and alpine containers
• Looks particularly attractive planted in groups
• Useful for extending garden colour into late winter

Frequently Asked Questions

When does Iris 'Blue Planet' flower?
It typically flowers during February and March, although timing will vary depending on winter temperatures and local conditions.

How tall does Iris reticulata 'Blue Planet' grow?
It is a dwarf Iris reaching approximately 10-15cm tall.

What is its spread?
Individual plants occupy around 5-10cm, with established bulbs potentially forming small clumps over time.

Where should I plant 'Blue Planet'?
Choose a sunny position with very good drainage. Rock gardens, raised beds, gravel gardens and containers are all excellent choices.

Can Iris 'Blue Planet' be grown in pots?
Yes. Its compact habit makes it particularly well suited to pots and troughs. Use free-draining compost and avoid allowing the container to remain waterlogged.

How deep should I plant Iris reticulata bulbs?
Plant the bulbs approximately 8-10cm deep with the pointed end facing upwards.

Should I remove the leaves after flowering?
No. Allow the foliage to die back naturally so that it can replenish the bulbs for the following season.

With its soft pastel-blue flowers, bright yellow detailing and compact early-flowering habit, Iris reticulata 'Blue Planet' is a charming choice for bringing fresh colour to containers, rock gardens and sunny borders at the very beginning of spring.