Selected from 100 percent immune to black knot plants our sloe plum seeds represent the highest immunity of black knot on a population level. Ioffer our 3rd generation seeds from the original variety 'Plena'. 'Plena' was fully hardy and fruitful in Michigan however the black knot is so severe it wiped out my planting after 15 years. When I ran into the second generation of seedlings I found numerous seedlings completely immune to this. As a result, everything else was removed and now I have this seed strain to go forward. This is a good selection for fruit production as well as cultivar development. However the plant itself is very productive and needs really little selection to be used commercially or otherwise. Sloe plum spreads by stolons making it even easier to develop and propagate new selections of this widely popular fruit known throughout the world. It has never caught on in the U.S. only because few people had the knowledge of its both health giving properties and well as its use.
Refrigerator method is best: Here is what to do with the seeds. Soak for one full day in water. Take out and pat dry. Add a moist media to the seeds like Canadian peat moss and store the seeds for 60-120 days at 38 to 42 F. Seeds will begin to sprout within 60 days in the refrigerator. Some will take longer and others will be doubly dormant requiring a warm period and then another cold period. This will be enough to crack all the stones which will germinate quickly when put at room temperature. But don't throw out the seeds if they do not sprout the first cold dormancy. You may have to give them another chance. These seeds were floated to get rid of the blank seeds. Extras were given to accommodate for partially filled seeds in case there are some.
|Genus & Species||Prunus spinosa|
|Height (ft)||3-5 ft. with 3-10 width if let to stolon|
|Pollination Requirements||Several plants is likely preferred for fruit yield, however lone plants are fruitful.|
|Soil||Grows very well in sandy and rocky soil. Not for moist soils.|
|Climate||Prefers a cold climate. Found in mountainous regions. Not for hot or moist climates|
|Ease of Cultivation||Super easy to grow from seed. Careful about damp off. Use an appropriate soil mix to allow good drainage. Once it reaches the height of 3 ft. and the shrubs are putting on spurs, then you know you are close to fruiting. For me it took 4 to 5 years to fruit in Michigan.|