— Iris sibirica is fully hardy and can be planted directly outside in the spring. They don’t require winter protection in most areas.
— Plant the rhizomes directly into clear, well-dug borders or start them off in temporary pots in spring and grow-on outdoors, then transplant later in the season as potted plants.
— Plant the rhizomes so that they are fully submerged in the soil, around 5cm deep with any shoots or emerging leaves exposed above soil level.
— Iris sibirica enjoys a position in full sun. Iris siberica likes a reliably moist soil, but not boggy.
— Space the bulbs 15-20cm apart
— Water-in after planting and keep hydrated when in growth.
— Cut the stems down to 3cm above soil level in autumn.
— Read further general instructions about planting bare-root perennials