If you're looking to add the elegant beauty of iris flowers to your garden in Minnesota, there are a few things you need to know about how to ensure your planted bulbs get enough water. To start, it's important to soak Siberian iris rhizomes in water overnight before planting them. Place them 1 inch deep (2 inches, if the soil is sandy) and 2 feet apart. When watering potted iris, do it from the bottom and don't give them more than an inch of water per week.
Potted lilies in terracotta pots may need a little more water, however. The upper part of the rhizomes should be visible when planted, and planting them too deep can result in slow growth and fewer blooms.When it comes to resistant bulbs or bulbs that bloom in spring, they require a cold period to break their dormancy and begin the development of spring flowers. Rhizome-type iris produces larger flowers and includes bearded and beardless varieties, while bulb-type iris produces smaller flowers and is often used in rock gardens or in the front row of borders. If you're ready to bring lilies to your garden, you can order many types of iris flowers online.To prevent future problems with iris borers, properly trim and clean your iris plants in the fall.
To extend the flowering season, plant more than one cultivar. During periods of drought (longer than three or four weeks), water your irises deeply every 3 or 4 weeks, depending on the temperature. At your local garden store, you'll likely find some iris bulbs or rhizomes for sale, depending on the season.When it comes to feeding your hungry Iris, add some low-nitrogen fertilizer when planting new lilies in summer or dividing older clumps. If preparing a large area for planting lilies, add ½ pound of a low-nitrogen fertilizer, such as 6-10-10 per 50 ft2 (or 1 ½ ounce by 10 feet) to your garden bed.
You can also use a food for irises specially formulated to help provide balanced nutrition in the flower garden. Fertilize your irises in early spring about 6 to 8 weeks before flowering and again after the flowers have disappeared.