Iris pseudacorus
yellow flag iris
- 9cm pot
- £12.99
- available to order from summer
- 3 × 9cm pots
- £34.00 £11.33 each
- available to order from summer
Delivery options
- Standard £5.99
- Position: full sun or partial shade
- Depth of water: 5-25cm (2-10in)
- Soil: reliably moist or boggy soil, or aquatic compost
- Rate of growth: fast
- Flowering period: July to August
- Hardiness: fully hardy
Sulphur yellow flowers, often with brown markings, appear from midsummer amongst the upright grey-green leaves of this vigorous water marginal. This native, evergreen yellow flag iris was once commonly found on marshy land and riversides and is ideal for planting at the margins of a large lake or pool. Iris pseudacorus also flourishes in deep, reliably moist soil that has been enriched with well-rotted organic matter. Great for wildlife and bog gardens, too.
These plants are potted up (using a suitable aquatic compost) into aquatic pots. These pots are made of a fine mesh, which allows water to circulate through the compost, providing the plants with both oxygen and nutrients.
If you are using them as a aquatic plant, they can be planted into neutral to acidic soil (for best results) up to a water covering of of 25cm (10in) deep. To enhance flowering divide congested clumps every three to five years.
If you are using them as a aquatic plant, they can be planted into neutral to acidic soil (for best results) up to a water covering of of 25cm (10in) deep. To enhance flowering divide congested clumps every three to five years.
- Humans/Pets: Harmful if eaten
