Three things drive the timeline: temperature, humidity, and the health of the mother plant. Keep your dome at 72 to 77 degrees Fahrenheit and humidity between 70 and 80 percent. A weak or stressed mother produces weak clones that root slowly, if at all.

If you tug the cutting gently after day 7 and feel resistance, roots are forming. New leaf growth at the top is another tell. If nothing has happened by day 14, the cutting probably failed.