Red Lane Gardens 2008
Design and photos
© Nancy Oakes
© Nancy Oakes
Japanese iris will grow well in the perennial border. They are heavy feeders and so require well amended soil that is moisture retentive. The pH should be on the acid side - 5.0-6.5. They require ample moisture, especially up to bloom time, but mulching will go a long way towards helping with water retention. A good inch of water per week, if there is no rain, is essential. Good culture will increase height, branching, flower size and quantity of bloom. They will grow and bloom better if planted in full sun.
The rhizome should be planted 1 to 3 inches deep, depending on the type of the soil. (Deeper in sandier soil) Planting in a depression of 3 to 4 inches will help to catch and hold more moisture. New roots form above the old roots, planting in a depression will permit the gradual filling in of more soil and compost, which will help to maintain the plant's vigor for a longer period of time.
Once the plants are established they can be fertilized with a balanced fertilizer in Spring and just before bloom. When dividing, do not replant in the same area, unless it is liberally amended with peat, compost and/or manure.
The rhizome should be planted 1 to 3 inches deep, depending on the type of the soil. (Deeper in sandier soil) Planting in a depression of 3 to 4 inches will help to catch and hold more moisture. New roots form above the old roots, planting in a depression will permit the gradual filling in of more soil and compost, which will help to maintain the plant's vigor for a longer period of time.
Once the plants are established they can be fertilized with a balanced fertilizer in Spring and just before bloom. When dividing, do not replant in the same area, unless it is liberally amended with peat, compost and/or manure.
Japanese Iris Culture
