Highbush Blueberry Germination:
1) Soak seeds in water for 24 hours.
2) Place seeds in a moist paper towel placed inside a zip lock bag & keep in the fridge for 90 days to cold stratify them. This will break the seed's dormancy. Periodically check to ensure they do not dry out, while being very careful not to keep them overly wet. Just slightly moist.
3) Fill treys or containers with Moist Sphagnum Peat Moss. Place seeds on top of the peat moss, and cover them with a very thin layer of well draining seed starting mix. No more than 1/4"
4) Use a spray bottle to mist them as needed to keep them from drying out. Misting will also help with keeping the seeds getting dislodged, and buried too deep while germinating.
5) Use a heated propagator to ensure the daytime temperature stay at 70-75 degrees F. Turn off the heated mat at night to create alternating temperatures. This mimics their natural conditions, and will greatly improve germination rates.
6) Use a grow light as Blueberry seeds need light in order to germinate. Or place in a window that gets filtered light, but never full sun while germinating.
7) Patience is needed as germination of Highbush Blueberry seeds is erratic. Some will germinate withing 6-8 weeks, but don't toss any out that don't sprout quickly as some can take up to 12 weeks.