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What you need:
  • Butcher knife
  • Spade
  • Pruning shears

Remove any vegetation still left on the plant, and dig up the root ball. Dicentra have thick fleshy roots that are easily damaged, so be sure to dig far enough away from the crown so that you get the whole root ball intact. Remove any loose soil from the root ball.
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Each division should have 3-5 eyes on it. Each eye will grow new vegetation next year, so the more, the better.
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The thickest roots on a Dicentra contain all of its stored energy. Try to leave these intact.
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Use a sharp knife to cut straight through the crown of the plant. Try to keep your divisions evenly balanced so that sufficient roots are available to support the top growth next season.
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Plant the divisions as soon as possible. The eyes on the top of the crown should be about 1/2 inch under the soil. Remember that the fewer divisions you make, the healthier each new transplant will be next season. It's also important to mulch the new divisions well to retain moisture, and if you're dividing in Fall, to protect against extremes of temperature. The mulch should not cover the actual crown of the plant, only the surrounding soil.