Hi Vida,
Yes, there are excellent gardens around the country too. I'm not sure if you know the name Myrtle Allen of Ballymaloe House in Co. Cork, but she was pushing the good
local food agenda before
Permaculture was ever written down. She's also my grandmother. Well, the Ballymaloe Cookery School (2km from Ballymaloe House) now carries the main educational flag - selling the message of Slow Food, Organic, Fresh and Local, Rare Breeds etc. If you're looking for gardens, theirs is excellent.
http://www.cookingisfun.ie/gardens/our-gardens
Say "hi" to my cousins when you get there.