Poisoned Petals — Joyce Lavene; Jim Lavene

Meet Peggy Lee: botanist, detective's widow, and owner of The Potting Shed, an urban gardener's paradise in downtown Charlotte. With the beautiful spring weather, business is booming--and death is in full bloom...

Peggy Lee is just about to deliver some endangered sunflowers to Darmus Appleby when a gas explosion blows out his door-- and Peggy finds her fellow botanist dead on the kitchen floor. And only two weeks later Darmus's brother dies, after being found unconscious in a community garden with his brother's wedding ring in one hand and--in his pocket--a lovely purple hyacinth with an overpowering scent.

Now Peggy must follow her nose--and some cryptic clues from an Internet informant--to root out a killer before he strikes again...