Windmill Palm Germination:
1) Fill a bowl with warm water, add the seeds, and allow them to soak for about three days. Change the water on a daily basis. Soaking the seeds increases their chance of germinating, and may speed up the germination process.
2) Put on waterproof gloves, pick up the seeds, and quickly dip them in a solution of one part household bleach to 10 parts water. Rinse the seeds with water. This process sterilizes the seeds, and reduces the chance of a fungal growth.
3) Use a well mixed & well draining potting soil. Plant only 1/4" deep with soil firmly pressed over them. Use a spray bottle to keep it moist but not wet. Avoid overwatering, because this can cause the seeds to rot.
4) Seal the pots with a piece of plastic tightly. This promotes the soil moisture retention during the germination process.
5) Use a heated propagator to keep the soil between 64 to 70 degrees F. Expect the seeds to germinate within eight to 12 weeks.
6) Remove the glass pane or plastic bag, as soon as germination sets in. Place the pot near a sunny window, so it's indirectly exposed to sunlight.