The frogs have been noisy night after night — and for Bob Gray, that means maple syrup season is over. Maple syrup producers have no precise way of knowing exactly when their season is up and the sap's not good — something known as off-flavour buddy syrup. Jugs of maple syrup line Gray's home, where he runs Kemble Mountain Maple Products. Miller started working with Ontario maple syrup producers in 2012, when he came to them with the problem of mould in maple syrup. After 34 years of making maple syrup, he's gotten good at knowing when to halt production come spring.

Source: CBC News April 25, 2019 09:56 UTC