There's an issue where gardens are not frequently updated. I don't know how many people have this issue, but I've heard a couple of other people mention their gardens don't get updated, and I expect that if you do core inspect on the chests in Yolanda's garden you'll find they were updated fewer than ten times in the last three ooc years. Despite checking them, mentioning it to staff, and emoting tending them. That might be an exaggeration, but I wouldn't be surprised!
I'd like to suggest a system similar to tree harvesting. A moderator or above could answer a helpop, look through the garden, see when it was last updated, and dispense the appropriate amount of plants. It would just need creative mode and a chart on what plants to give and when. They could sign a book and quill with the last time it was updated in an underground chest like with the fruit trees, and if someone on staff needs to ask a question about the garden they can check who signed the book. Having the date would help keep track of what to give the garden.
Helpops would be less consistent by far so that's a definite no. We actually already perform most of the rest of this as well so it is just most likely fatigue for the gardens. We're seeking out some solutions now to help keep those updating the gardens on the task.