Thanks Tunkers. I think the timer I ordered will do any sequence I want. I'm guessing I want as little spraying as possible to keep the stems wet. I'll start short and add time to see how long I can go. Gonna be a fascinating afternoon .Not a pump, using an atomizer to create fog. Fastest I've had roots is 5 days. Just saying if you have a 15min timer around, it is doable...