Answer: To encourage additional blooms all season, remove the spent flowers, preferably cutting the stem back to a five-leaflet leaf. Roses in containers need frequent watering; however, this can leach nutrients out of the soil in a hurry. So feed your roses every two weeks with a diluted liquid fertilizer. If your fertilizer is formulated for feeding at six-week intervals, cut the amount in thirds and apply it to your rose every two weeks.
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