Answer: Rugen strawberries aren't supposed to develop runners, but sometimes they do. Cut the runners off and the plants should grow into mounds. If you leave the runners on, you'll have many small plants instead of a dozen mounding plants. Since your plants are young, you'll want the crowns to develop so the plants can produce berries. If you allow the runners to remain, energy for their development will come from the parent plants, at the expense (or delay) of maturity of the parent crowns. If the plants were in my garden, I'd cut the runners off.
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