I don't know what language that GUI is but you could add a few data points.
Pseudo example for entering "Time in Flower" as difference between starting and ending dates, obviously translate the code as you wish.
Code:
StartingDate = <Starting Date>;
HarvestDate = <Ending Date>;
DaysFlowered=DateDiff(StartingDate, HarvestDate, "d");
I'd add parameters for EC/PPM, Watering Interval, Nutrients Used etc..
As
@Merlin1147 stated it would be smart to get a digital meter that can sit in the room and give you long-term data points on your environment. Then you can go back to
a picture of a nice plant look in your environment history and see exactly what made it happy, if that makes sense. lol