What's the best site to use for starting a blog where many people can read/comment on it?

I'm going to build a garden soon and I want to keep a blog about it. I'd like a site that lets me post pictures and keep everything organized. Cost isn't an issue but free is always better. I'd really like a site where other people can search 'gardens' for example and find my blog. A site with a strong social networking aspect and community is

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