Stale bread will not make you sick. Chefs use it in recipes for croutons, breadcrumbs, etc. as long as there is no mold. Stale just means it's lost it's moisture. If it tastes OK to you, then eat up! = ) twofunnyboxers Â· 10 years ago.
Color. While knowing when to harvest Concord grapes is more about taste than color, Concord grapes will turn a telltale darker shade two to three weeks before peak harvest. The color can vary depending on where it is grown, with the standard deep blue-purple color slightly lighter in colder areas and darker in warmer climates.
Other Indicators of Ripeness. The most reliable way to tell if grapes are ripe is to taste them for sweetness. Size and appearance also indicate maturity. As grapes ripen, their color changes from green to red, blue, white or purple. The grapes may develop a characteristic white bloom, which looks like a light powdery coating. They become large and slightly less firm. The seeds of table grapes turn from green to brown.