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.
After harvest, remove the canes that bore fruit.Prune purple raspberries the same as black raspberries, buttip the primocanes when they are 30 to 36 inches tall, and,when plants are dormant, head lateral shoots to between10 and 18 inches (fig. 5). Blackberries.