Answer: Continue to allow the spears to grow and replenish the plants. For the rest of the growing season, be sure to keep it weeded and mulched until frost turns the foliage yellow. Once that happens, you can cut the stems down to about two inches. Remove all of the prunings, especially if you have had asparagus beetles this summer. Then layer the bed with four to six inches of compost or organic mulch to help control weeds next year and also add organic matter and nutrients to the soil. Since asparagus is somewhat heavy feeder, you may wish to fertilize early next spring or top dress with compost.
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