More than a blog
Writing on a blog has been the dominant force for people to distribute their personal ideas over the last decade or two. Digital gardens is a spiritual successor to what blogging has done.
The big difference is that digital gardening recognizes the time it takes for ideas to grow. You can publish your thoughts in article format but coming back to your thoughts and refining or tuning them is the big idea here.
Theres no big "publish date". And once your thought is out there, it doesnt mean you can't update it.
As a metaphor
Gardening can be used as a rich metaphor for cultivating your thoughts.
You're thoughts grow as you do. Sometimes you have thoughts that turn out to be incorrect and you have to prune them. Other times you've noted something deeply true and it becomes an Evergreen Note. Something that says true through the test of time.
More than a website
Digital gardening extends to anywhere you place your thoughts. This can be the notes app on your phone to any number of tools people are using these days: Obsidian, Roam Research, Dendron, Notion.
If you are using your computer in some way to cultivate your thoughts, then you are tending a digital garden.
Joel Hook's has a digital gardening post that I like to point to as a good further reading on digital gardening.
I've written about 5 No Code Digital Gardens for those that want to publish their thoughts online but dont have the technical ability to code their own website yet. I've also written about how I use Org Mode and Org Roam to keep track of my digital garden in this post.