I have propagated some blueberry cuttings that are new growth. I mist around 6 or 7 a day, at least every two hrs. It has worked well prior to it getting in the high 80's here in Missouri. I know that the ideal misting time is 10 secs every hr until dark. I just cant afford a setup like that. My misting timer only allows me to mist hrly as it doesnt record secs. MOst of the cuttings still look good, some look great and some had to be replaced with drying leaf edges. Im guessing some work root and some will not. I also heat the bottom to around 75 degrees. I keep the cuttings in my greenhouse. Its also been around 100 on the hot days in the house. I have provided much better air circulation and may have improved that somewhat.