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Bulb · Iridaceae family

Netted iris

Iris reticulata

Full sun to part shade 0.1–0.15 m × 0.08–0.1 m Flowers March–April to −29 °C
Flower colours Click a colour

In short a 10-second read

SunFull sun to part shade
Size0.1–0.15 m
spacing 10 cm
FlowersMarch–April
PlantingSeptember–November
WinterNo winter protection

Where to plant and how much to water

Sun, soil and water.

It grows best in full sun to part shade, in dry to average soil.

Sun

Sun6 hours or more
Part shade3–6 hours
Shadeunder 3 h

Soil

acidic to neutral soil
acidicneutralalkaline
dry to averagesandygravellyloamy

Watering

drought tolerant once establisheddo not waterlogless when it rains

Frost

−29 °C
no winter protectiondies back in winter, regrows in spring

How much space it takes

Mature size.

The mature plant next to a person (175 cm).

50 cm1 m1.5 m0.1–0.15 mspread 0.08–0.1 m
0.1–0.15 m× spread 0.08–0.1 m

Plant 10 cm apart.

Reaches maturity in about 2–5 years. The final size depends on the cultivar and the spot — we give the range from smallest to largest.

Calendar

Through the year.

Months for Central Europe. The line shows the current month.

The year at a glance

Flowers: JanuaryFlowers: FebruaryFlowers: MarchFlowers: AprilFlowers: MayFlowers: JuneFlowers: JulyFlowers: AugustFlowers: SeptemberFlowers: OctoberFlowers: NovemberFlowers: DecemberPlanting: JanuaryPlanting: FebruaryPlanting: MarchPlanting: AprilPlanting: MayPlanting: JunePlanting: JulyPlanting: AugustPlanting: SeptemberPlanting: OctoberPlanting: NovemberPlanting: DecemberJanFebMarAprMayJunJulAugSepOctNovDec
FlowersPlanting
Now, in October: a good time for planting (bulb).
JanFebMarAprMayJunJulAugSepOctNovDec

Flowers

JanFebMarAprMayJunJulAugSepOctNovDec

March–April · purple or blue

Planting

JanFebMarAprMayJunJulAugSepOctNovDec

bulb: September–November

What to plant now (October) full list in October (244) →

Feeding

Nutrition.

Light
high-potash fertiliser

Pests and diseases

Common problems and what to do.

The most common problems in Central Europe. Protection is listed from the gentlest option.

High riskMedium riskLow riskRisk for this plant according to the source · no label = no documented level

Ink disease

Bipolaris iridis
Medium riskdiseasesource covers the whole genus

What you will see

Black spots on leaves, bulb with ink-like spots.

The source says: it is seen most commonly on this bulbous iris.

When to look

Mainly in spring and summer

How to protect

  1. Prevention
    • Check bulbs before planting and throw away any with ink-like spots.
  2. By hand early springDispose of affected plants; rest the soil for several years.
Ink diseasedisease · mainly in spring and summerMedium risk

What you will see

Black spots on leaves, bulb with ink-like spots.

The source says: it is seen most commonly on this bulbous iris.

When to look

Mainly in spring and summer

How to protect

  1. Prevention
    • Check bulbs before planting and throw away any with ink-like spots.
  2. By hand early springDispose of affected plants; rest the soil for several years.
Slugs and snails

Slugs and snails

pestsource covers the whole genus
More about this problem

What you will see

Eaten holes in leaves and young shoots, at night and in damp weather.

How to protect

  1. Prevention
    • Water in the morning, not in the evening.
    • In winter turn over the soil and remove fallen leaves — birds will pick out the eggs.
    • Encourage natural enemies (birds, toads, hedgehogs, ground beetles).
  2. By hand evening, spring to autumnCollect slugs and snails in the evening by torchlight on a warm, damp night; traps made of hollowed-out citrus peel or small containers of beer sunk into the soil — empty them in the morning.
  3. Biological spring to early autumnPhasmarhabditis hermaphrodita nematodes (they work on slugs, hardly on snails); apply to moist soil at 5–20 °C.
Slugs and snailspest

What you will see

Eaten holes in leaves and young shoots, at night and in damp weather.

How to protect

  1. Prevention
    • Water in the morning, not in the evening.
    • In winter turn over the soil and remove fallen leaves — birds will pick out the eggs.
    • Encourage natural enemies (birds, toads, hedgehogs, ground beetles).
  2. By hand evening, spring to autumnCollect slugs and snails in the evening by torchlight on a warm, damp night; traps made of hollowed-out citrus peel or small containers of beer sunk into the soil — empty them in the morning.
  3. Biological spring to early autumnPhasmarhabditis hermaphrodita nematodes (they work on slugs, hardly on snails); apply to moist soil at 5–20 °C.
More about this problem
Sources (3)

Frequently asked

Quick answers.

When does netted iris flower?

In March–April; the flowers are purple or blue.

Does netted iris tolerate shade?

It tolerates part shade (3–6 hours of sun), but not full shade.

How much space does netted iris need?

At maturity 0.08–0.1 m wide and 0.1–0.15 m tall; recommended spacing 10 cm.

Ink disease — what can you do?

Check bulbs before planting and throw away any with ink-like spots. Dispose of affected plants; rest the soil for several years.

Slugs and snails — what can you do?

Water in the morning, not in the evening. Collect slugs and snails in the evening by torchlight on a warm, damp night; traps made of hollowed-out citrus peel or small containers of beer sunk into the soil — empty them in the morning.

Sources (15) Checked 20 October 2026

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