Posted: 18/03/2014 at 18:08
The RHS Encyclopedia; 2 volumes, keeps my biceps in trim as I consult them often. The only prob; new plants are being developed all the time. So when I go mad and buy something; the actual plant is not in the book, only it's relatives.
I'm sure some enterprising 14 year old will develop an 'app' that constantly updates the RHS plant books
For veg; 'The vegetable and plant expert'
For lawns; get a husband and let him deal with it! Otherwise have a tiny lawn.