Gather blueberries in summer after they ripen to a solid, bluish-black color and the flesh yields to slight pressure. Collect several berries to increase the likelihood of locating viable, intact seed.
Remove the blueberries from the freezer after the cold stratification period has ended. Place the bag on the counter for one to two hours, or until the blueberries have thawed to room temperature.
Blueberry shrubs start easily from seeds gathered from berries.
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Place the nursery pots outdoors inside a lightly shaded cold frame. Cover each pot with a sheet of newspaper. Warm the pots to between 60 and 70 degrees Fahrenheit with a germination mat if daytime temperatures stay below 60 F.
Fill a blender three-quarters full with fresh water and pour in 3/4 cup of blueberries. Secure the lid. Run the blender for 10 to 15 minutes to macerate the berries.
Place the blueberries in a sealable plastic bag. Store them in the freezer for three months to cold stratify the seeds, which will help fulfill their dormancy requirement and help prompt germination.
Thin the blueberry seedlings to two per pot once they grow to 2 inches. Keep the strongest, most vigorous of the seedlings and remove the weaker ones. Snip off the unwanted seedlings at soil-level with small scissors.
Pour the contents of the bowl through a fine sieve or wire mesh colander. Collect the tiny, reddish brown seeds from the sieve. Spread them out to dry on a sheet of newspaper.
Blueberry species such as the highbush blueberry (Vaccinium corymbosum) and lowbush blueberry (V. angustifolium) serve a dual purpose in landscaping as both an ornamental ground cover and edible crop. They grow best within U.S. Department of Agricultural plant hardiness zones 8 and below, where they will start …