My sims' garden isn't even all that sizable and I was finding it absolutely ridiculous for them to
completely bottom out in Hygiene like that.
Don't get me wrong, the hack is perfectly good and dandy for anyone who wants it, but it's not all
that unbelievable for hygiene to take a massive hit from gardening. Mucking around in the dirt and the hot sun is a fast way to accrue some funk, and it's not like they're only out there for a minute or two - especially with multiple plants to tend. Maybe I'm a clean freak, but I find myself wanting a shower after any serious yard work, and crawling in the dirt to dig up weeds definitely qualifies.