Where Can I Find The Best Articles On Home And Garden That I Can Post On My Website?

There are many resources you can look through on homes and gardens. You do not say what you website is about, however there is a lot of information  in the lifestyle portions of the Sunday newspapers They often suggest resources,books and sites on home improvement and gardening.
Your  local library can help you with finding these books and  then you could write on your site in your own words making reference to the articles.
Having links on your site to those with the right content    helps both sites attract more traffic.
You could also commission a writer to write articles on the subjects you want if you cannot do it yourself,Google can help you find them. Put in key words like gardening,home,lifestyle, writing and you will be able to find writers advertising.
These are popular subjects and many people have an interest in them so gardening clubs may be able to find people  for you who will write articles too.