What not to plant near irises?
Because Irises will grow so easily in a wide range of soil and sun conditions, very few plants are considered bad companion choices. However, shade lovers are some of the few plants that don’t combine well with Irises. Keep the pot outdoors during the winter. When bloom buds begin to appear in the fans, bring the pot inside and place in a bright sunny window. After bloom, be sure to divide your Iris and replant outside or into more pots.For Iris to bloom consistently, they need full sun, good drainage, lots of space, and quality soil. To improve your chances of bloom, add fertilizer and divide large clumps. Only 60-75% of Iris bloom the first year after planting. Sometimes they need an extra year to become established.
Where is the best place to plant irises?
Iris will thrive in most well-drained garden soils. Planting on a slope or in raised beds helps ensure good drainage. If your soil is heavy, coarse sand or humus may be added to improve drainage. Gypsum is an excellent soil conditioner that can improve most clay soils. Irises do well in most regions of North America and are hardy from zones 5 – 9; they bloom best in full sun but can also be planted in partial shade.Trim Iris foliage to a height of about 6 inches. A clean garden will help prevent the spread of various fungal diseases and can discourage overwintering pests from building nests. Evergreen boughs or straw make a good winter protection for Iris, particularly in areas with especially harsh winters.The bearded iris will grow on relatively poor soil. On poor soil, however, plants will benefit from the use of a good garden fertilizer, such as a 5-10-5 formula, dug into the soil around the plants in early spring or just after they have bloomed.