You don't have to be patient to grow impatiens.
I planted these (from greenhouse plants NOT from seed) in early May and it is almost the middle of October and they are still growing strong - and this is lower Michigan that I'm talking about. They have been in constant bloom for the entire time that they have been planted in the ground, which is basically 6 months. The beautiful dark green foliage really makes the color of each flower just pop - they are stunning.
Impatiens also attract Humming Birds
Each plant starts out small and sparse but by July they fill in and make a wonderful border for a walkway (as seen in the picture above).
No matter what your gardening expertise level - Impatiens are a fantastic addition to any garden.