How to germinate blueberry seeds (fast) Use some blueberries that you bought from the store. The seeds are small and of an amber brown color. Make sure they have gone through a cold period. Now they are ready to plant. Cut the blueberries in halves and place them directly onto the soil. Cover with a top layer of soil about half inch. Water and keep soil moist and a temperature above 60 degrees F. Germination can take 14-21 days.