Once the spathe has died back in the fall, remove the red berry flesh from the seeds. Plant the seeds immediately (don't let them dry out). The seeds may be sown outdoors where you want the plants to grow, covering the seeds with 1/4 to 1/2 inch of soil. Seedlings should come up in early spring. You can also place freshly cleaned seeds in a plastic bag with some potting soil and refrigerate them for 6-8 weeks, then sow the seeds in pots (indoors). In spring, plant the seedlings outdoors. The new plants may take several years before they are mature enough to flower, but they can live as long as 20 years!

Jack in the Pulpit is hardy into USDA zone 3. They grow best in moist but well drained, organically rich soil. (Excessively wet soil in the winter may cause the underground parts of the plant to rot.) They should be planted about a foot apart in partial to full shade.