It appears that there is an upper limit of 3 hours duration for any zone. I had understood that long deep watering was desirable for trees, so with emitters I have been doing about 10 hours about every 2-3 weeks. A 3 hour limit seems like it would encourage shallow root structure. What am I missing?
Hi @garmanmd, thanks for reaching out.
Great question. Yes, the mobile app has a 3 hour watering duration limit as we had some user pocket watering their lawns. 
However, on the web app, we do allow for durations up to 10 hours. Perfect for your trees!
To access, please visit our website > select log in (upper right hand corner):
Enter your credentials:
From the schedule screen (calendar), click on the schedule you’d like to edit:
Summary appears, select edit:
From the drop menu, select durations > override up to 10 hours.
Hope this helps.
Best, Emil