I'm a big advocate of 'grow your own' cat grass since I felt suspicious about my cat's funny tummy after eating the generic garden store stuff.Hmmmm, I tried the cat grass, apart from being rather suspicious that Mouse's gums seemed to get red every time we had it in the house (maybe chemicals in the growing meium or something?) he made such an evil mess draggin the bits of grass around the house roots and all I decided he wouldn't get any more. I did feel mean though..... You could also grow cat grass and catnip (mint) :-)
I have a huge garden and just love doing things in it. I have feature pots at the two doors, and I'll put flowers appropriate to the season in them, but the rest of the garden just gets planted and looked after whenever I have the time.