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Repotting guide

When & how to repot Netted Iris (Iris reticulata)

Also called Netted Iris, Dwarf Iris, Reticulate Iris.

More about netted iris

About Netted Iris

Iris reticulata · also called Netted Iris, Dwarf Iris · flowering

Netted Iris is a tiny, bulbous gem that erupts into fragrant violet-purple flowers with orange-marked falls in late winter to early spring, often pushing through snow. Growing just 10–15 cm tall, it thrives in full sun and sharply drained, neutral to alkaline soil. Hardy to USDA zone 5 and RHS H7.

Mature size: 10–15 cm tall (4–6 in), spread 5–10 cm (2–4 in)

Watch for — Failure to rebloom: Bulbs often dwindle after 1–2 seasons in heavy or wet soils, or where summers are cool and damp. Lift after foliage dies back, dry in a warm spot, and replant in autumn in improved drainage or treat as annuals.

How to tell netted iris needs repotting

Repotting on a calendar is less reliable than reading the plant. For netted iris, watch for these signs:

For the underlying biology of a pot-bound root system and why it stalls a plant, see our guide to spotting and fixing a root-bound plant.

How often to repot netted iris

Lift and divide every 3–4 years once clumps congest. Rather than a true repot, netted iris is lifted and divided once the clump congests and flowering drops off. Dwarf bulbous perennial producing narrow, four-angled leaves and single flowers per stem; bulb tunic has a distinctive netted (reticulate) pattern.

What size pot to step netted iris up to

Pot size matters less than depth and spacing here. When you replant netted iris, set the bulbs or tubers at the correct depth (a rough guide: two to three times their own height of soil over the top) and space them so they are not touching. A wide, shallow pot suits a clump better than a tall narrow one.

Not sure of the exact diameter? Our pot size calculator takes the current pot and root spread and tells you the right next size — it deliberately recommends a single step up, never a big jump.

The best time of year to repot netted iris

The only safe window is dormancy: wait until the foliage has yellowed and died back naturally, lift and divide then, and replant before or at the start of the next growing season. Disturbing netted iris in full growth or flower sets it back badly.

Step-by-step: repotting netted iris

  1. Wait for dormancy. Let netted iris foliage yellow and die back completely. Lifting while it is in growth wastes the energy it is storing for next year.
  2. Lift carefully. Loosen the soil well away from the bulbs/tubers with a fork and ease the whole clump out without spearing them.
  3. Separate the offsets. Gently pull the clump apart into individual bulbs or tubers. Keep only firm, healthy, blemish-free ones.
  4. Replant at the right depth. Reset them in fresh sharply drained, neutral to slightly alkaline sandy loam or gritty soil at the correct depth and spacing — not touching — so each has room to bulk up.
  5. Water in and rest. Water once to settle them, then keep on the dry side until growth resumes. Do not feed until leaves are actively growing.

Aftercare

After replanting netted iris, keep the soil barely moist — not wet — until shoots appear; bulbs and tubers rot in cold, saturated soil. Once leaves are growing strongly, resume normal watering. Hold off feeding until the plant is in active growth again.

The right soil mix for netted iris

Netted Iris wants sharply drained, neutral to slightly alkaline sandy loam or gritty soil. Excellent drainage is essential. Plant in a raised bed, rock garden, or border with added grit. Tolerates chalk, clay, loam, and sand provided water drains freely away from the bulb. Boggy or heavy clay soils cause rot. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting netted iris — frequently asked questions

How often should you repot netted iris?

Lift and divide every 3–4 years once clumps congest for netted iris. Netted Iris is lifted and divided, not "repotted". Every 3–4 years, once the foliage has died back and it is dormant, lift the clump, separate the offsets, and replant at the correct depth in sharply drained, neutral to slightly alkaline sandy loam or gritty soil. Crowding, not pot size, is what reduces flowering over time.

What size pot does netted iris need?

Pot size matters less than depth and spacing here. When you replant netted iris, set the bulbs or tubers at the correct depth (a rough guide: two to three times their own height of soil over the top) and space them so they are not touching. A wide, shallow pot suits a clump better than a tall narrow one. Use our pot size calculator to size it from the plant's current pot and root spread.

When is the best time of year to repot netted iris?

The only safe window is dormancy: wait until the foliage has yellowed and died back naturally, lift and divide then, and replant before or at the start of the next growing season. Disturbing netted iris in full growth or flower sets it back badly.

Do you "repot" netted iris, or lift and divide it?

You lift and divide it. Netted Iris grows from bulbs or tubers, so instead of repotting you wait for dormancy, lift the congested clump, separate the healthy offsets, and replant them at the right depth and spacing. Doing this every 3–4 years restores flowering.

Should you fertilise netted iris after repotting?

Hold off feeding netted iris until it is in active growth again. Fresh soil already carries enough nutrients to get it re-established, and feeding disturbed roots too soon does more harm than good.

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