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.
1 Tie remaining canes to your fencing. 2  To force your everbearing raspberries to produce only one crop in the fall, prune back the entire raspberry bush in early spring. 3  As the canes grow back in the summer, remove outside suckers and thin the canes to about 6 inches apart.