Gather round, ladies and gents, “boys and gourds,” for a Scots-flavored tale of a little girl who communes with plants.

“Grow” is a cute-aiming-for-cutesie comedy about Halloween, a pumpkin growing contest and learning to “go organic” because that’s what the plants tell you they prefer.

High stakes competitive pumpkining can lead to all sorts of chicanery, and since director John McPhail gave us “Anna and the Apocalypse,” keep an eye peeled for a pumpkin “Psycho” murder and a “Godfather” touch in where one dead gourd winds up.

But most of the giggles here are from a Brit Comic Who’s Who supporting cast of Jane Horrocks, Tim McInnerny, Jeremy Swift and Alan Carr. And there’s Nick Frost, nipping at your nose for good measure.

Priya Rose-Brookwell is Charlie, an impish orphan determined to get to L.A. because she’s sure that’s where her Mum ran off to, “to be the new Wonder Woman.” The System has just about given up on her when they finally turn up her one blood relative.

Aunt Dina (Golda Rosheuvel of “Bridgerton”) is a struggling farmer up Mugford way, where her Little Farm is the only holdout not growing cucurbitaceae in “The Pumpkin Capital of the World.”

No, it’s not the “real” pumpkin capital. But it’s quaint and Scottish and the locals say “Oy!” a lot, especially to anybody who wants to know their personal jumbo-growth pumpkin growing secrets.

Charlie has this special connection to plants, and she figures the £100,000 prize could get her to LA to search for the mother who ran out on her. So why not swipe some seeds, ask around for “tips,” memorize the English measuring system from pounds to stone to tonnes, and have a go?

Aunt Dina is no help, and her lazy hired hand (Joe Wilkinson) would rather teach her his dangerous chores (herbiciding the weeds) than answer her questions about pumpkins.

A classmate’s (Dominic McLaughlin) ag-chemical dad (Jeremy Swift) figures pumpkin growing in the lab is best for weight if one wants to break the “one tonne” barrier.

But the idle rich neighbors, the Smythe-Gerkins (Horrocks and McInnerny) have their own methods, and have been winning the contest for generations.

There’s nothing for it but for Dina to introduce Charlie to organic woodlands weirdo Arlo (Frost) who lives in an ancient caravan (camper) in the forest. The kid who communes with and finesses the flora convinces him to pitch in.

A “descended from greatness” seed is selected and planted, a vine sprouts and “Peter” the pumpkin is named and nurtured towards annual Big Contest at the Mugford’s fall fair.

The script isn’t a laugh a minute, but it has its charms. The messaging about how pumpkins are like people, “It’s not how they look that matters, it’s what’s inside” is obvious but soft-sold.

The kid has a great grasp of the acting craft and holds her own with her esteemed co-stars.

And the pumpkin sabotage scenes are funny, punny and worthy of “Wallace & Gromit.”

Live-action kid-friendly fare like “Grow” is a rare thing, these days, especially at the height of Horror Season. Better grab the tykes and dash off to this before the last “pumpkin spice” lattes are served.

Rating: PG

Cast: Priya Rose-Brookwell, Golda Rosheuvel, Jane Horrocks, Tim McInnerney, Jeremy Swift, Dominic McLaughlin, Alan Carr and Nick Frost.

Credits: Directed by John McPhail, scripted by Nick Guthe, Ruth Fletcher and Christos N. Gage. A Sky production, a Fathom release.

Running time: 1:47