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1 If you decide to plant seeds, they should be planted in late spring (in a bed or in a container) about 1/8 inch deep and 24 to 30 inches apart. They will take 10 to 21 days to germinate.  However, ff you already have an established sage plant, you can use cuttings or layering techniques to grow a new plant.
It depends on which seed you have. Generally seeds take between 7 and 14 days to germinate. There are of course exceptions, some varieties can germinate within 2 days if conâ¦ditions are right, where as others can take literally years to germinate - even if conditions are right. 15 people found this useful.