Gardening Questions And Answers
Fortunately, for cat lovers, impatiens are non-toxic to cats. They make lovable companions, but cats can drive their owners batty by eating houseplants. It is good for cat owners to know that impatiens are nontoxic to cats, according to the American Society for the Prevention of Cruelty to Animals (ASPCA).
Impatiens downy mildew is caused by the fungus-like water mold Plasmopara obducens. This organism is commonly first introduced into a garden on infected impatiens transplants. It can also be introduced by windborne spore-like structures called sporangia. These spores can be found in soil and in infested plant debris.
Usually a sticky substance on the leaves is a sign that sucking insects are present on the plant. Spider mites leave a tell-tale webbing on the undersides of leaves, especially where the leaf meets the stem. Carefully inspect your plants for the webbing. Most likely the culprits are aphids or whiteflies.
These plants are extremely sensitive to improper watering. They wilt quickly but usually revive if watered soon after wilting. Fertilize: New Guinea impatiens will benefit from an application of slow-release fertilizer when planted or a light feeding every two weeks with a balanced water soluble fertilizer.
Impatiens rooting can also be achieved with water. In fact, impatiens cuttings root easily using this method. Simply remove any lower leaves and place the cuttings in a glass or vase of water, up to the first couple of nodes. Place it in a bright location out of direct sunlight, such as a well-lit windowsill.
Impatiens generally don’t require deadheading as they are a self-cleaning plant that naturally sheds spent blooms, according to North Carolina State University Extension. However, even impatiens can benefit from deadheading if the plant has become stressed and has lost the majority of its blooms at the same time.
Second, New Guinea impatiens tolerate more sun than traditional bedding impatiens. New Guineas grow in full or part shade. They thrive in a spot that receives morning sunlight and afternoon shade. In warmest zones where summers are hot and humid, New Guinea impatiens definitely benefit from light shade.
Do not plant outside until all danger of frost has passed, preferably with night temperatures above 45 degrees Fahrenheit. They prefer day temperatures of 70 to 85 degrees and night temperatures of 55 to 65 degrees Fahrenheit. New Guinea impatiens thrive in the high-humidity zones of 10, 11, and 12.