What do these 🪨,🫛,🌱,🪴,🌳 mean? (aka a digital garden legend of sorts)

I think we've already established that I'm a millennial and you can pry my emojis from my cold, dead hands.

🪨 - rocks, facts or concepts that are already set (for me), unlikely to change but may get eroded over a long period of time
🫛 - seeds, tiny germs of ideas that I haven't cultivated enough
🌱 - seedlings, ideas or notions that are starting to develop and grow
🪴 - plants, more developed than seedlings, could live or die depending
🌳 - trees, even more developed ideas or ideas that I've been considering/growing/using for a while