- 1). Find a planting site for the Chilean rhubarb. The plant can tolerate temperatures as low as 0 degrees F, making it hardy in U.S. Department of Agriculture hardiness zones 7 and higher. It prefers full sun, but it can also tolerate partial shade.
- 2). Purchase Chilean rhubarb from a commercial seed provider. This plant is rare in the U.S., and a mature plant is unlikely to be available from a nursery.
- 3). Soak the Chilean rhubarb seeds in water at room temperature for a full day. Moisten an unbleached coffee filter with water; place the seeds on the filter, spacing the seeds 1 to 2 inches apart.
- 4). Fold the coffee filter in half and place it in a plastic bag. Seal the bag and place it in a warm, sunny location, such as a southern windowsill. Allow the seeds to sprout, which should occur in two to four weeks.
- 5). Remove the seedlings from the coffee filter, and plant them in rich humus soil with good drainage. Place a clear plastic sheet over the seedlings to keep the humidity high. Water the seedlings regularly to keep the soil moist.
- 6). Cut the dead leaves with pruning shears after the first frost. Wrap the leaves around the living plant to protect it during the winter in cool climates.
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