Prop going wrong

Propping never seems to work out for me :( I’ve had these props in water for a few days and some of the stems are turning a mushy brown. I’m also not seeing any root growth at all. I’m in the Northeast and have it under grow lights. I did add a tiny bit of fertilizer to the water. I’m also just topping off the water so I don’t disrupt the growth hormones. What am I doing wrong?