Sea pink is an interesting flower. Growing naturally along the seaside, it does not tolerate wet or rich soils but prefers salty infertile soil. Sea pink is extraordinarily drought-resistant and requires little water, making it suitable for mountainous regions. Sea pink is also hardy through zones 3 to 9. In colder zones, you must winterize sea pink. Some winter die back is expected in the snow and cannot be avoided, but overall, sea pink's winter protection needs are minimal.
Stop watering sea pink in the fall. The soil in which it grows must be dry during the winter or sea pink will die of root rot. If you plant sea pink in a container you can continue to water lightly, once every week for a few minutes.
Dead head any remaining flowers on the sea pink. Cut the stems down about 5 inches from the base of the plant. Leave the base of the stems so they may die back in the freeze and protect the rest of the plant.
Trim off any dead leaves at the base. Leave the rest of the foliage alone. Sea pink needs all of its living foliage to get through the winter.
Remove any weeds from the area around the sea pink. If your sea pink in planted in a rock garden, be sure to move the rocks aside and look for weeds.
Allow the sea pink to die back naturally. The dead foliage can be removed if desired. If you leave the dead foliage on it will protect the sea pink from further die back. Container-planted sea pink can be moved inside if it is kept near a window with full sun. Place it back outside on sunny days.