Looking on the internet deeply has found these results:

to work in the garden is the most popular phrase on the web.

to work at the garden 11,600,000 results on the web	to work in the garden 12,680,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Works at the garden centre where I used to. You sent Mehmet to work on the garden. I love you. There's plenty of other guys that work at garden supply stores. My cousin works at the Garden of Allah. Abby and I are going to work on the garden. You can work in the garden in exchange for food. Me and Naoko still have to work in the garden. She works at Garden Springs Spa, if you call jerking off random dudes working.	Abby and I are going to work on the garden. So if you're not sure how to use your free periods, we need people to work in the vegetable garden. He used to work in her garden or something. One time back in Naples I work in the garden as a landscaper for a very rich man. You can work in the garden in exchange for food. I would like to work in your garden. I think I'll go out and work in the garden a bit. Me and Naoko still have to work in the garden.

to work at the garden

11,600,000 results on the web

to work in the garden

12,680,000 results on the web

More popular!

Works at the garden centre where I used to.
You sent Mehmet to work on the garden. I love you.
There's plenty of other guys that work at garden supply stores.
My cousin works at the Garden of Allah.
Abby and I are going to work on the garden.
You can work in the garden in exchange for food.
Me and Naoko still have to work in the garden.
She works at Garden Springs Spa, if you call jerking off random dudes working.

Abby and I are going to work on the garden.
So if you're not sure how to use your free periods, we need people to work in the vegetable garden.
He used to work in her garden or something.
One time back in Naples I work in the garden as a landscaper for a very rich man.
You can work in the garden in exchange for food.
I would like to work in your garden.
I think I'll go out and work in the garden a bit.
Me and Naoko still have to work in the garden.