Q.Is it safe to plant impatiens this year
Concerned about Downy mildew disease. Is it still a problem this year?
Downy mildew is always a potential problem so I would not let the threat of downy mildew prevent you from enjoying impatiens. You can minimize the threat of downy mildew by engaging in good gardening practices (specifically watering techniques), which are discussed in the following article:
https://www.gardeningknowhow.com/plant-problems/disease/downy-mildew.htm
Another thing you may want to consider is New Guinea impatiens - they are said to be downy mildew resistant. More information on new guinea impatiens can be found here:
https://www.gardeningknowhow.com/ornamental/flowers/impatiens/new-guinea-impatiens.htm
For additional information on impatiens and downy mildew, visit the following link:
https://www.gardeningknowhow.com/ornamental/flowers/impatiens/impatiens-downy-mildew.htm