Yellow Flag Iris Commonly known as the yellow flag Iris, Iris pseudacorus is often seen in boggy areas or growing in shallow water at the edge of a pond. Planted out in boggy ground, this plant colonises rapidly to form large clumps with long, erect strap shaped leaves and bright yellow flowers in summer. As with all Iris, the tubers are harmful if eaten. This plant is a great attractor for butterflies and bees. Position: Full sun to part shadePlanting depth: Grow in the damp margin to 20cm (8’’) below water level.Growth rate: FastFlowering Period: May to JulyHardiness: HardySize: Height: 100cm (26"). Spread: 60cm (24") Sometimes taller in open ground Aquatic pot and compost variations Aquatic plants come in a variety of pot and compost variations that have different benefits for planting and growing. Mesh Pot (Aquatic Compost)Pot can be removed and plant can be planted directly into soil or margins above or below the water line. Pot and plant can also be placed directly into water to be container grown, but will still need repotting in time. Pot (Aquatic Compost)Pot must be removed and plant should be planted directly into soil or margins above or below the water line. Pot (Regular Compost)Pot must be removed and plant should be planted directly into soil or margins above the water line. Cannot be planted directly into soil below the water line.