“Peace, Love  & Misunderstanding” is a forgiving little trifle, an open air feast of Woodstock Generation cliches. How much you forgive this easygoing romantic comedy depends on your tolerance for tie-dye, Jane Fonda, senior citizens who never outgrew their ’60s idealism and The Grateful Dead.

Fonda lends a little ’60s sass to a timeworn tale of daughters testing and judging their mothers, and apples eventually returning to the tree they once fell quite far from

She’s the mother — or grandmother — to that “patron saint of the uptight,” New York attorney Diane (Catherine Keener). Whatever their differences, Diane flees to Grace’s farm with her college age daughter (Elizabeth Olsen) and teenage son (Nat Wolff) when Diane’s husband (Kyle MacLachlan) demands a divorce.

Mother and daughter have been estranged for twenty years. They have issues, and not just wildly divergent lifestyles and politics.

Granny Grace lives in Woodstock, New York. She tells the story that Diane — whom she named Diana — was born during the Jimi Hendrix set at the famous concert there, 43 years ago. Grace, in every way you can imagine, never left Woodstock.

Granny still smokes pot. She still grows it. Heck, she’ll teach the kids all about cannabis.

“It’s OK to toke a little hay,” she lectures. “But nothing in needles! Nothing up the nose!”

There’s the weekly Saturday morning protest, the Full Moon celebration of fertility that all the local women come to (Rosanna Arquette among them). And the painting — Granny likes sleeping with the guy who models for the nude portraits she paints

Diane is still embarrassed by her mom’s refusal to grow up. But her daughter, Zoe, is just as ashamed that Mom is all onboard the divorce train, and that she slips into an easy flirtation with local singer/furniture maker, Jude (Jeffrey Dean Morgan).

Idealistic Zoe tests her anti-violence/vegan beliefs when she’s attracted to the town’s hunky butcher (Chace Crawford). Socially inept Jake (Wolff), who videotapes everything, gets seduction advice from Granny when he takes a shine to a local hippy teen.

Director Bruce Beresford (“Tender Mercies,” “Driving Miss Daisy”) follows his artist-escapes-from-communist-China biopic, “Mao’s Last Dancer,” with a romance that rarely aspires to be more than cute. Keener, cast against her Earth Child vibe, struggles to suggest a woman who would be in the least bit conflicted by being drawn to hipster Jeffrey Dean Morgan and the skinny dipping/free love lifestyle her mother espoused. Morgan, taking his second shot at a Woodstock movie (“Taking Woodstock”) has an easygoing charm, here. And he and Keener share one magical moment — a duet on a song that he plays in concert, that she knows from her childhood.

The kids are likable, with Olsen meeting her beguiling match in hunk-du-jour Chace Crawford.

But it is Fonda, serving up the ’60s, who is reason enough to check this one out. “I’m positively oracular,” she bubbles. Her Grace is an open invitation to “Peace, Love & Misunderstanding.” Everybody’s welcome, even those Fonda peers who never got over their lifelong Fonda hate.

“Exclusion is an unnecessary violence, don’t you think?”

MPAA Rating:R for drug content and some sexual references

Cast: Jane Fonda, Catherine Keener, Elizabeth Olsen, Jeffrey Dean Morgan, Chace Crawford, Kyle MacLachlan

Credits: Directed by Bruce Beresford, written by Joseph Muszynski and Christina Mengert, an IFC release.

Running time: 1:34