Problem in DT Watch
Do you like to own plants but never remember to water them?
Also tell me if you have seen similar ideas and refer me to them. Thanks
However just because something has been done before doesn't immediately rule the idea out, it may be the case that existing products don't work in the way the consumer would like and they have frustrations with it. Have a look at reviews on websites to gauge how users felt about the product they brought.
Personally I would advise making a survey, ask what frustrations people have with plant keeping, what products they already use and what their ideal product would be.
You have identified a problem of forgetting to water which could be a viable area however there could be an even bigger problem and you won't know this until you have asked.
Sign up to a gardening forum and post your questionare there, you could also (with the permission of the garden centre) set up a stall at a garden centre and ask questions to shoppers
RAPID electronics do a moisture sensor - basic electronics - kit