Seed Swaps

Yellow flag iris        

Iris pseudacorus

  • 16 plantings
  • 1 for swap
  • 0 wanted
  • 4 stashed

Yellow flag iris is part of the Iris genus and its scientific name is Iris pseudacorus.

Yellow flowering species of Iris, grows best in wet conditions (such as wetlands). Can become invasive in some areas.
Strap like long bright green leaves.

This variety typically blooms in the following colours:   Canary yellow and   Banana yellow and   Process yellow. When mature, blooms are roughly 8.0 cm (that's 3.12 inches in imperial) in diameter. The blooms display an average of 5 petals. This variety typically produces fruit in the following colours:   Apple green and   Ruddy brown. The leaves of this particular variety normally show as   Ao green and   Forest green (traditional)

It is a non-edible flower / ornamental that typically grows as a perennial, which is defined as a plant that matures and completes its lifecycle over the course of three years or more.

Yellow flag iris is known for its clump-forming habit and growing to a height of approximately 1.50 metres (4.88 feet). This plant tends to bloom in late spring, followed by first harvests in late summer.

This plant is a great attractor for butterflies and bees, so if you are looking to attract wildlife Yellow flag iris is a great choice.

Yellow flag iris is great for inexperienced gardeners and those that like low maintainance gardens.

This plant info is provided by the myfolia gardener's wiki. All details about Yellow flag iris have been kindly provided by our members.

How to grow Yellow flag iris

  • Full Sun

  • Partial Sun

  • Medium

Remove the old flower heads to conserve the plants energy when seeds are not required
Divide established clumps every four years or so to keep the plants growing strongly

Try to plant in a location that enjoys full sun / partial sun and remember to water moderately. Keep in mind when planting that Yellow flag iris is thought of as very hardy, so this plant will tend to survive through freezing conditions.

See our list of companion Plants for Yellow flag iris to see which plants you should plant in close proximity to encourage growth.

Growing Yellow flag iris from seed

Can be grown from seed but easier and quicker to divide an established clump in the late summer or autumn after flowering

Transplanting Yellow flag iris

Transplant in early spring after last frost, or after dividing an established clump in early autumn

Ensure that temperatures are mild and all chance of frost has passed before planting out, as Yellow flag iris is a very hardy plant.

Seed Saving Yellow flag iris

Wait until seed pod turns brown, then cut the stem and collect the heads into a paper bag. Continue to dry the seed pods on a warm windowsill, until they split to release the seeds.

How long does Yellow flag iris take to grow?

These estimates for how long Yellow flag iris takes to sprout, grow and harvest are from real observations from real gardeners, right around the world.

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Yellow flag iris Etymology

Its specific epithet, meaning “false acorus,” refers to the similarity of its leaves to those of Acorus calamus, as they have a prominently veined mid-rib and sword-like shape. 1

Yellow flag iris Folklore & Trivia

Used to decontaminate heavy metals from drinking water

Other names for Yellow flag iris

Yellow water iris, Yellow iris

Iris pseudacorus L.

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