Laura and Rosemary are called in to investigate when gardens entered for a village contest are attacked by a disease. Further sinister undercurrents are exposed when reigning champion Donald Westward is found dead and recriminations start to fly as buried rivalries come to the surface.

An archaeologist posing as Rosemary dies mysteriously during a dig for Anglo-Saxon artefacts in the grounds of Lord Engleton's stately home, presenting the duo with a fresh mystery to solve. The gardens are unaccountably blighted by yellowing, forcing the estate to close its gates to the public, and a second death suggests somebody will go to any lengths for a piece of British history.

Laura and Rosemary are hired to create a restaurant garden on Italy's Ligurian coast, but it is not long before their working holiday is disrupted by a murder. Determined to solve the crime before returning home, they find themselves with no shortage of suspects - and matters are complicated further by a second death.

The green-fingered sleuths are hired to work behind the scenes of a garden makeover TV show, but Rosemary has an accident while standing in for the programme's star and ends up in hospital. Realising someone is trying to sabotage the series, Laura teams up with no-nonsense presenter Quinnie Dorell to catch the culprit.

The duo are hired to investigate why newly planted roses at an upmarket preparatory school keep dying. After witnessing the arcane ritual of the Night of the Stag, they detect tensions between modernising headmaster Quentin Marshall and established members of his staff who are harbouring secrets someone is prepared to kill for.

Rosemary's old school friend Dorothy invites the duo to restore the gardens of her beautiful villa on the French Riviera so the property can be opened to the public. The plan arouses bitter hostility among the neighbours and long-held family secrets start to surface, leading to murder.

The duo are enlisted to design a memorial garden based on the myth of Orpheus and Eurydice, but someone begins vandalising their work on a nightly basis. Matters are complicated still further by the death of a recovering alcoholic, whose body is found at the site.

The amateur sleuths continue their investigation after Martin Frazer's cousin, who supposedly drowned, is spotted alive and well a few days later.

The green-fingered amateur sleuths are drawn into another mystery when a barrister employing them to spruce up his garden discovers his cousin has been drowned, only for the man to be spotted alive and well a few days later.