The name of Cleo's grandfather, as shown in the name of his grocery store, is Matteo. It is listed as Mateo in the end credits.
When Cleo is planting in her garden, Gabe help dig a hole. When they pick up the tree and move it towards the hole it is in a pot, but a second later as they lower it into the ground, the pot is gone and you see the roots are now surrounded by dirt.
The movie is supposedly set in the Spring, but a recurring bit revolves around, fresh, in season persimmons. Persimmons are in season in Fall and early Winter, not the Spring.
The movie takes place in early May. There is a date on food truck competition winner check - May 8th, 2020. However, it was clearly shot in the late autumn: 1) you could literally see the frost coming out of the breath in a lot of scenes when cast spoke/talked; 2) in every scene with trees (forest, around Morelli's house, and etc) they didn't have leaves. To mask it, they used a lot of artificial flowers in close shots because obviously there are no flowers in the late autumn, and even some artificial trees.