As for essential oils that have long shelf lives usually, they are the thicker ones, such as Cedarwood, Sandalwood, Patchouli, Vetiver and a few others. Exception to this thick oil quality will be the essential oil of Rose Otto.
The season for them is generally a short one. Begins in early July and last for 2 to 3 weeks. Black raspberries tend to ripen before most red raspberries varieties expect for the early ripening summer ones.
Cranberries are grown in boggy fields in the northern and north eastern states and Canada and are harvested in the fall. If you want whole cranberries, October November is the time to buy them fresh. Frozen they will last several months.