How to grow Iris 'Obsidian'
Try to plant in a location that enjoys full sun and remember to water moderately. Obsidian is generally regarded as a very hardy plant, so this plant will tend to survive through freezing conditions. Obsidian needs a soil ph of 6.1 to 7.8 (weakly acidic soil - weakly alkaline soil).
Growing Obsidian from seed
Try to aim for a seed spacing of at least 1.19 inches (3.05 cm) and sow at a depth of around 0.99 inches (2.55 cm).
Transplanting Obsidian
Obsidian is very hardy, so ensure you wait until all danger of frost has passed in your area before considering planting outside.
Harvesting Obsidian