Gardening Questions And Answers
Flopping iris indicate it’s time to divide the clump, especially if this has not been done within the past three years. Iris also will fall over if they are growing in too much shade or if they have been over-fertilized with a high-nitrogen mix that will spur foliar growth at the expense of flower development.
Iris plants are best cut back in the fall. Spent flower stalks can be removed in spring after the plants finish blooming, but the foliage should be left standing through summertime. In mid-autumn, cut the leaves back to about 3″ long above the soil line. Read on to learn all about how and when to […]
There are more than 200 species of iris and related plants. The entire plant is toxic. Iris toxicity is generally mild in humans, but in pets and cattle, it can cause serious illness and death. Symptoms of iris poisoning in pets vary in severity depending on amount of exposure and which part of the plant […]
Iris flowers are the main group of flowering plants in and around the pond in June. Iris versicolor, Iris louisiana and Iris pseudacorus all grow with their roots and crowns covered by water in the pond. Pond Iris flowers can be white, yellow, orange, blue, purple or black giving a bright show from late May […]
Bare root rhizomes should be soaked briefly before planting. Iris reticulata and Iris histrioides bulbs can be planted much more closely together at 10cm (4in) apart and 7cm (3in) deep. You can add a mulch of organic matter each spring (but avoid contact with the exposed rhizomes as it could lead to rot).
The blue variety “Wedgewood” (Iris xiphium “Wedgewood”) is the familiar florist’s iris, forced for year-round availability. Plant bulbs 3 to 4 inches deep and 6 inches apart in USDA zones 6 through 9. Bulbs increase by division and can be dug up and separated every few years. Plants go dormant in summer.
Bearded Irises Grow from Rhizomes Such plants also spread by rhizomes, and irises are no exception. While some rhizomatous plants, like bamboo, spread rapidly and even invasively, the iris spreads fairly gradually—one of its main virtues for gardeners. But, as iris rhizomes spread, they become crowded.
Iris bulbs are hardy enough to plant outdoors, but you can also plant them in pots that are kept indoors. When iris bulbs are grown indoors, they experience a longer blooming season because you can regulate the temperature. In addition, indoor irises will not be eaten by pests such as deer, squirrels and gophers.