Here are 5 short tips for germinating Sapindus emarginata (Soapnut Tree) seeds:
 
Scarify the Seeds: Use sandpaper or a file to lightly scarify the seed coat to help water penetrate and encourage germination.
 
Soak in Warm Water: Soak the seeds in warm water (around 70-80°F / 21-27°C) for 24-48 hours to soften the tough outer shell.
 
Warm, Humid Conditions: Keep the seeds in a warm (75-85°F / 24-29°C) and humid environment to promote sprouting. A plastic bag or dome can help maintain humidity.
 
Well-Draining Soil: Plant seeds in a well-draining, slightly acidic or neutral potting mix to prevent waterlogging.
 
Consistent Moisture: Keep the soil consistently moist, but not soggy, and avoid letting it dry out during the germination period (2-4 weeks).
 
With patience and proper care, you'll be on your way to growing soapnut trees!

Also known as Sapindus emarginata Seeds, Sapindus trifoliatus Seeds, Soapnut Tree Seeds