Impatiens flowers have much to offer, including shade-tolerance, long-lasting blooms, and brightly colored blossoms that come in a variety of colors.
Water
Although with sufficient water they can be grown in partial sun in northerly regions, their great virtue is that they thrive in the shade. In fact, they're among the relatively few readily available, inexpensive flowering plants that will put on a great floral display even when grown in full shade. Once in the ground, the impatiens will need at least 2 inches of water a week.
Temperature and Humidity
Impatiens are quite sensitive to heat. If your temperatures rise above 85 degrees Fahrenheit, they will require at least 4 inches of water per week. Container impatiens will need daily watering and twice daily if temperatures are above 85 degrees Fahrenheit. They are quite sensitive to water. If there has been a long, dry spell, your plants will likely look wilted. Thankfully, they bounce back quickly. Give them some water and they will perk back up.
Impatiens are tropical plants. Once the first frost comes, they will turn to mush. Bring them indoors if you plan to winter them indoors during the colder months. They are fine in humid weather.
Fertilizer
The impatiens flowers will look best if regularly fertilized. A water-soluble fertilizer can be used every two weeks throughout the spring and summer. Another option is a slow-release fertilizer used at the beginning of the spring and again, halfway through the summer. If your impatiens plants start looking leggy late in the summer, use scissors to trim off the top third of their vegetation. This will promote the emergence of new blooms and improve the overall appearance of the plants. One possible cause of legginess is over-fertilization.