Annona muricata, Soursop, Guanabana, Guyabano, Prickly Custard Apple, Graviola, 10 viable seeds

Annona muricata (Soursop) is evergreen tree native to tropical America, specifically Colombia, it spreads through the Caribbean in the 17th century from Curacao then called Curasso or Corossol (soursop). This is one of the first fruits Christopher Columbus introduced in the Old World. It adapts to a hot and humid climate and draining soil.

The fruit is quite large, heart-shaped, green and dotted with small conical and soft spikes. The pulp of the soursop is very white and sweet, with inside black and flat seeds. Ripened it may be 15 to 35 cm (6" to 14") for a diameter of 10 to 20 cm (4" to 8") and may weigh up to 3kg (6.6 lbs). There is no season, we can find soursop all year.

Annona species flowers are complete, bisexual, i.e., with functional male and female. Pollination by insects.

Germination method
It's always the best to sow the seeds right out of the fruit. Seeds stay viable for up to six months but better success is met by planting within 30 days of harvest and seeds will germinate within 15-30 days. But it's not always possible.
So if you purchased dried seeds you need to soak them in water for 4 days, changing the water every day.
After pre-treatment get a clear plastic food container, fill it with moist vermiculate (not soggy) and push the seeds in lightly (I didn't cover them completely), keep at 25-30°C.
Seeds will germinate in about 2 weeks.
***I also tried to treat the seeds with GA3 (Gibberellic acid) but surprisingly the results were not as satisfactory. The germination started after 1 month and longer, with 750 ppm many seeds eventually rotted, with 500 ppm germination rate was close to 50%. Maybe lower concentration would work better. But seriously it is not necessary, if soaking the seeds works just fine and faster!
Plant germinated seeds in pots with well draining compost.

A rapid grower, soursop trees produce their first crop three to five years from seeding.