Canberra gardeners are also planting small, hardy lettuces like red mignonette or buttercrunch, hoping they will grow big enough before the soil cools down. They are also opting for celery, which may not produce large stems but will yield delicious tender leaves in winter. Potatoes are being planted for an early spring harvest. Additionally, pansies, primulas, Iceland poppies, and other winter flowers are being added to gardens. Heartsease, wintercress, and Warrigal spinach, a native green that requires boiling twice to remove oxalic acid, are also popular choices for winter gardening.