A smaller, single garden patch for 1 item, to use as decoration like a houseplant.
I've noticed when you plant something in the garden patch and fill it up with 5 spoiled meat, you get a special version of what you've planted, ie. 3-leaf clover, 4-stem sprig alongside the 3 normal versions that grow. It'd be cool to have the same rule of spoiled meat apply to a single plant so you could have a sprig bunch or a 3-leaf clover as living decor or anything else that has a special variant.
Even though they're not considered a resource, it'd be cool to be able to chop a piece off the succulents in the sandbox as well and grow them as decor - be a nice way to turn them into something rather then background fill and another reason to risk the sandbox.