I learned about Digital Gardens through a passing reference to Maggie Appleton. She gives a thorough history of the phenomenon on her site so I'll comment on it summarily here.
Discussions of digital gardens I've seen all describe then them like pottager gardens, whimsically untidy; a place where soft green buds of new ideas can gently emerge from fertile ground. Where these ideas can sway in the warm breezes of their keepers' minds and grow to form a leafy canopy of cross-connected ideas, allowing dappled sunlight to fall on the originator as they take sprouts, saplings, mosses, and mature timber from their digital garden and refine them into polished, finished pieces to publish elsewhere on the 'net, like market gardeners taking fresh, wholesome content to sell in the town square.
I liked the idea, but in the form I found it it wasn't the tool I needed. Hence the digital scrapyard
https://maggieappleton.com/garden-history
https://joelhooks.com/digital-garden
https://www.swyx.io/learn-in-public
James Ravenscroft on digital gardening
Scratch paper for this page
“A garden is a collection of evolving ideas that aren’t strictly organised by their publication date. They’re inherently exploratory – notes are linked through contextual associations. They aren’t refined or complete - notes are published as half-finished thoughts that will grow and evolve over time. They’re less rigid, less performative, and less perfect than the personal websites we’re used to seeing.” Maggie Appleton
Fair enough. Personal records aren't organized or complete and they're not at all rigid.
Some compare them to Zettelkasten.
Some call them personal wikis or second brains.
Some refer to them as systems for Personal Knowledge Management, though that sounds to me like a FranklinCovey product line.