Hi @ChrisC, good evening. I appreciate your feedback. I'm reviewing your support ticket in detail, but wanted to address your concerns related to start times, seasonal adjustments, and scheduling here.
This is default start time we use for all watering schedules. As @plainsane mentioned...
...watering at different times of the day is never can have negative impacts to the health of the vegetation. Nevertheless, watering during the day isn't a goal of ours either and we're working on a solution to fix this.
The Iro creates a watering time based upon the ET on the day the schedule was created. Using the current Water Budgeting feature, we will increase/decrease the seasonal adjustment on a weekly basis. Hunter's model uses the max ET schedule for your area (usually calculated using ET in July) as it's reference point for 100%. It will then assign a monthly seasonal adjustment for each month based upon historical ET data. This is a great model and valid reference point, but it doesn't account for real time weather changes.
Our v2.0 software release will enhance the current water budgeting feature by taking a new "checkbook" approach. In short, each zone will have it's own "bank account" that will increase with "deposits" (watering events, rainfall, etc) and decrease with "withdrawals" (evaporation, wind, etc). A minimum and maximum budget for each zone will be set and the water level will automatically be kept within this budget given watering rules you set. Think of it as automated watering times with real time water budgeting on a daily basis.
I hope I addressed this concern in my last comment. I wish I could show you a preview of v2.0, but it will address many of your concerns. In case you weren't aware, v2.0 will be released at the end of this month.
I know we're currently reviewing your precip rates in support, but rotors can and do commonly water for 45 minutes. I know this sounds like a long time, but you have to remember that rotor heads will typically apply approximately 0.5 - 1.0 inches of water per hour. Fixed spray heads will apply approximately 1.5 – 2 inches of water per hour. This is why your rotor zones will usually need to water 2 - 4 times longer than your fixed spray zones to provide equal precipitation rates.
It's also important to remember that to water an entire area evenly with rotor heads, you should not use the same gallon per minute (GPM) nozzles in every rotor head. You can save between 10 and 40 percent of the water used in a rotor irrigation zone by proportionally matching the precipitation/application rate of the rotor nozzles. For example, a rotor only covering a 1/3 circle should have a nozzle installed in it that is roughly applying 1/3 of the GPM that the nozzle in a full circle rotor in the same zone is applying.
We share your concern, and appreciate your feedback on this subject. We are working to address this issue in regards to schedule creation and zone grouping.
Could you tell me more about this? Did you purchase your Iro from the Rachio Store or one of our retailers? I don't see any support tickets related to this issue under your account nor have I heard of this issue occurring before.
As promised, I will review your account in detail and be in touch via email. Feel free to reply here or email going forward.