Iris pseudacorus (Yellow Flag)


Iris pseudacorus, or Yellow Flag, is a very effective plant for the phyto-purification of ponds, natural pools and phyto-purification systems

SKU: IRIS-PS Categories: , Tags: , , ,
Don't forget to buy a basket and fertilizer for this plant
This article has a special discount
Single price for 2+ plants -12,5% € 7,00
Single price for 5+ plants -25% € 6,00
Single price for 10+ plants -31,3% € 5,50
Single price for 25+ plants -37,5% € 5,00
Single price for 50+ plants -43,8% € 4,50
Single price for 75+ plants -50% € 4,00
Single price for 100+ plants -56,3% € 3,50

Additional information

Main characteristics

Iris pseudacorus has long greyish-green leaves that start at the base forming a kind of narrow fan. The leaves have a protruding median rib

Vegetative cycle

Marsh irises end their vegetative cycle in summer, turning more yellow, but regain vigour in autumn, remaining green throughout the winter until spring


The flowers have a diameter of 10 cm and they are of an intense yellow colour. After flowering, fruits develop that open in autumn, dropping numerous seeds into the water

Flowering period

Flowering lasts 2 weeks between April and May

Planting depth

Marsh iris to be grown in a water depth of 0/-10 cm

Plant height

It can exceed one meters in height

Soil to use

Field soil with 2/3 tablets of Osmocote fertilizer near the rhizome


Full direct sun for at least 6 hours in the middle hours of the day

PH tolerated

Very acidic to slightly basic (alkaline): 3.6 to 7.7

Frost Resistance

Yes, it withstands very cold temperatures


Native plant of Europe, widespread from sea level up to 1000 m altitude

Shipped plant

In temporary 9×9 basket

With a purchase of at least 100€ you gain access to Aquatic Plants Gold Exclusive and enjoy the following benefits:

  • free shipping (in major European countries, or discounted in other countries);
  • assistance services for 12 months;
  • opportunity to activate the 100% Growth Guarantee (on water lilies, lotus flowers and marsh plants, recommended by us through the Easy Pond Kits or Pond Consultation, or chosen by carefully reading the plant data sheets on the website and planted according to the printed manuals included in the shipment);
  • detailed videos on how to grow aquatic plants;
  • practical printed manuals on how to plant aquatic plants correctly in order to sort all your doubts out.

Do you have questions about order management and shipping?

Discover all the answers to frequently asked questions about plant shipping, order management, and shopping tips.