Iris flowers are among the most beautiful cultivated flowers, adding a touch of elegance to any garden. Bearded lilies, the most commonly available in Minnesota, come in hundreds of varieties and colors ranging from dark purple to cream. To ensure successful growth and blooming of these majestic flowers, it is important to understand the ideal temperature range for growing them in Minnesota.The best time to plant bearded lilies in Minnesota is late summer and early fall, when nighttime temperatures remain between 40° and 50°F (4° and 10°C). This is when the bulbs are most likely to break their dormancy and begin the development of spring flowers.
In terms of soil requirements, irises prefer full sun, except in hot, arid regions. They can tolerate some shade, but less than half a day of sun will reduce flowering and vigour. They tolerate a wide pH range, but prefer neutral or slightly acidic conditions; a pH of 5.5 to 6.5 is best. Rich soils with plenty of organic matter are ideal for irises, as they like abundant moisture and can withstand flooding for short periods of time.
However, they are not water irises and a site must have adequate soil drainage.When it comes to curing the bulbs, they should be placed in a dark, dry, warm place with good air circulation; the ideal temperature for curing is between 65 and 70°F. In conclusion, the ideal temperature range for growing iris flowers in Minnesota is between 40° and 50°F (4° and 10°C) during late summer and early fall. The bulbs should be planted in full sun or partial shade, depending on the region's climate. The soil should be rich with plenty of organic matter and have a neutral or slightly acidic pH level between 5.5 and 6.5.When curing the bulbs, they should be placed in a dark, dry, warm place with good air circulation; the ideal temperature for curing is between 65 and 70°F.