I just use a spreadsheet. Have several pages of info. One is my wish list with priority numbers (by groups 1-4) and a description including size, colour, etc.
One page lists the acquisitions from each year BY year.
Name, Size, Description, Price, Comments - arranged alphabetically, but within the year.
Another page is alphabetical listing:
Name, Year Acquired, Location in the garden
And I add more pages as needed for specific reasons - such as a check list of all the hostas to help make sure I photograph all of them each week, etc.
Ann