Murder in Cold Mud — Emily Organ

The Compton Poppleford Horticultural Society Annual Show is just around the corner but there's a problem: someone is murdering the competitors. Stories of vegetable rivalry abound as the local constabulary, Inspector Mappin, investigates.
When the death toll increases, Mappin drafts in assistance but refuses to allow Churchill and Pemberley to help. The two ladies decide to solve the case themselves, however their efforts are hampered by the inspector's accusations of meddling.
Can Churchill and Pemberley battle the odds to find the culprit before another gardener dies? Compton Poppleford's long-buried secrets are unearthed as the duo close in on the killer in their midst.

For fans of light-hearted mysteries and sharp-witted elderly sleuths.
Murder in Cold Mud is the second book in the Churchill & Pemberley cozy mystery series.
Book 1: Tragedy at Piddleton Hotel
Book 2: Murder in Cold Mud
Book 3: Puzzle in Poppleford Wood - available on pre-order