Had a chat with Masked_Koopa on Discord and decided I'd pitch my alternative to his idea for making Berry Bushes renewable.
Berries will, naturally, contain seeds. We also have access to potent fertilizers in Glommer Goop, Tree Jam, Compost, etc. as well as proper Farm Plots, able to raise much less hardy plants with ease.
At least for Berry Bushes, it'd be as simple as making some kind of Bush Starter Kit out of some Berries and fertilizers and either just planting it in the ground or on a Farm Plot. The Farm Plot idea is more interesting but maybe not in a welcome way. Maybe bushes need a lot of Fertilizer, or are super touchy about there not being too much fertilizer on the plot while still needing Nutrients. It also presents the opportunity for creating Juicy Berry Bushes in a world that doesn't have them; either a change in the recipe (Lunar Moth Wing?) or growing a Bush in a certain way gets you the Bush variant you didn't start with. Either nutrient balance or how well/poorly you tended the bush.
It also ties into the Tumbleweed renewability path. They can already drop fresh Berries, but there's nothing to do with those but eat them.
Grass Tufts are harder to justify but have decent options. I'm thinking that Grass Gators already produce Grass and aren't easy to trip over, so maybe giving them a chance to drop Grass Tufts isn't a bad idea.
Saplings I am completely lost with. Maybe revisit the Farm Plot idea, and if you plant a Twiggy Tree Cone on a plot with no nutrients or weeds, it fails to grow into a Tree and instead becomes a Sapling. Twiggy Trees naturally generate on all gamemodes so you don't really need a way to get more.
I understand that there is a reason why these items have not been made renewable yet, but I'm really lost as to what that reason is. These items generally exist in ridiculous excess and can actually be replaced, but having no option for getting more is a little strange.
tl;dr grow Berry Bushes from Berries, hunt Grass Gators for Tufts, and raise a very sad Twiggy Tree for saplings.