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.
PRUNING SUMMER-BEARING RED RASPBERRIES. In the spring when pruning raspberries, remove all the weak, diseased, and damaged canes at ground level. Leave the healthiest and strongest canes. Remaining canes should be spaced about 6 inches apart. Also, prune out the tips of the canes that have died due to winter injury.