I go this article directorie: http://www.healthypark.com/ My niche is some kind of healthy fruit. Wher should I put my article's then?!
Yes. select exact or related category and submit your article. there is also lots of healthy article directories, search on Google.
For my point of view you may have "Nutrition & Supplements" category as Healthy fruits could be part of nutrition.
I made an article directory, I'm trying to get people to register and submit articles, check it out, it's free http://listmylink.com