Question
I HAVE A NEW GUINEA IMPATIENT MY SON GAVE TO ME FOR MOTHERS DAY. IT HAS GROWN WELL UNTIL NOW. I HAVE TRANSPLANTED IT TWICE DUE TO THE SIZE. THE STEMS ARE NOW LOOKING LIKE THEY ARE DYING (YELLOW AND LEAVES TURNING BROWN AND CURLING UP). THE SOIL IS STILL MOIST AND I DO NOT WANT TO OVER WATER. THE STEMS TO THE PLANT ARE AT LEAST 12" TALL. HOW CAN I SAVE THIS PLANT FROM DYING? I HAVE IT INDOORS IN A POT IN FRONT OF WINDOW. I HAVE TRIED MIRACLE GROW ON IT WITH NO LUCK. REALLY DONT WANT TO LET IT DIE. SOMEONE SUGGESTED PLANTING OUTDOORS BUT THIS IS FIRST TIME I HAVE HAD THIS KIND OF PLANT.
THANK YOU

Answer
It is very hard to i.d. disease without the plant right there in person. Even a photo is not really reliable. But I can tell you what I THINK may be wrong.

Around this time of year, in certain regions and under growing conditions -- you did not mention where on the planet you are growing your Impatiens and that would help -- Spidermites are a major problem. They thrive under very low humidity, as you find in desert regions and under central heating in the middle of winter, and subside once humidity increases.  In between, a humidifier helps, washing the leaves 2x a day helps, and a plastic bag to retain humidity around leaves helps.  Watering does not help.

The other possibility is the most common mistake pretty much everyone makes when they are growing a new plant, and that's watering.

Plant roots need air to breathe.  Take away the air -- which is what happens after they use it up -- and you have a problem.  You also have anaerobic bacteria, which attack root tissue.  Lack of air is a problem for roots.

This is where overwatering comes in.  When too much moisture sits too long around the soil where roots are trying to breathe, they run out of air.  Then the bacteria come along and make it even more of a problem.

Best way to water: Flood, let drain, let sit until almost dry (2 or 3 days for average humidity and temps).  Then flood again.  Impatiens wilt badly when you don't water.  But they lose leaves as they fight for life while losing precious root tissue.

Miracle Gro makes it even worse.  Here you have a chemical assault on the roots, wiping out any remaining "good" bacteria that might at least displace anaerobes.

Since I don't know where you are, which could be anywhere from the North Pole to the Equator, on land or sea, I can't tell yuou if putting it outside to grow will be good or bad.  If you would like to volunteer this we can discuss it further!

Water right, i.e., stop.  Wash and cover w/ a plastic bag (but do not place in full sun) and keep leaves moist.  Watch what happens.  rsvp,

THE LONG ISLAND GARDENER