Christmas Special: Laura and Rosemary are called in to tackle a stubborn species of weed threatening an entire year's vintage at the Crickle Valley vineyard. As ever, they find themselves in the right place at the right time when the body of a wine critic is discovered on the premises.
In preparation for the millennium celebrations at Wellminster Cathedral, Rosemary and Laura are asked to restore the old monastery "physik" garden. But when a young woman is found murdered, they realise someone is not happy about their work and that they could be in serious danger.
The granddaughter of a famous botanist is selling her house and has asked Rosemary and Laura to tidy up the garden and reorganize the seed museum. But when a mysterious South American man is found dead in the back garden, it seem sthere is more to the seed collection than meets the eye.
A former boyfriend of Rosemary's invites her and Laura, to help create an Arabic garden at his home in southern Spain. But one of the local residents is found dead, and a mysterious landowner, Luis Mendes, is the chief suspect.
As Rosemary and Laura help re-create an original Victorian planting in Regent's Park, Pavel Volkar, a Harley Street psychiatrist is found murdered. Holly, Volkar's bereaved three-legged dog, may be key in solving the murder.
While working on a memorial garden meant as a wedding present, Rosemary and Laura find an abandoned baby under a gooseberry bush. As they try to find out who the mother is and why she would abandon him, another mystery lands in their lap.
Laura's son, Matthew, and his friends are on holiday at a beautiful tennis camp in southern Spain. When one of the players is found dead after a night out, everyone assumes it was a drunken accident, but Laura and Rosemary suspect foul play.
Rosemary and Laura prepare the garden of the Open Air Theatre for opening night as one of the actors accidentally shoots himself during rehearsal. The police discover the gun was loaded with live ammunition.