The listing, 'Purple Tatula' Datura - 10 seeds has ended.
Scrape or nick the seeds with a knife. This is called scarification. It helps germination by penetrating the protective outer layer of seeds.
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Soak the seeds in a thermos full of warm water for 24 hours. Put the seeds on a growing tray and cover them with a thin layer of vermiculite or compost. The layer should not block the light; Datura seeds need light to germinate. Alternatively put the seeds in a clear plastic bag, and leave it unzipped to let in fresh air. The plastic bag helps keep in moisture.
Place the growing tray or plastic bag on top of a water heater or other place that is at least 80 degrees Fahrenheit. Keep the seeds moist but not soggy. Check them daily to see if they have germinated, which should take from three to eight weeks.
Remove seeds that have sprouted. Fill a pot with a commercial potting medium, poke holes in the soil and plant the seeds in the holes deep enough to cover the roots. Moisten the potting medium and place the pot in indirect light.
Plant the seedlings outdoors in well drained soil in full sun when they have developed true leaves. The first leaves to appear will be embryonic seeds called cotyledons. The second set of two leaves look like the leaves of the adult plant.