Winterizing strawberry plants involves heaping wintering mulch over strawberry plants so they’re not exposed to cold winter air.   Apply a wintering mulch over the plants when they’re fully dormant. It’s safe to apply winterizing mulch to strawberry plants when the top one-half inch of soil has frozen and daytime temperatures stay consistently in the 20s. Mulching too early may cause the plant crowns to rot and the plants may fail to harden off.  Heap a loose mulch that will not compact over plants to a depth of 3 to 5 inches.  Good mulch choices include straw,  hay, bark chips, chopped cornstalks or cobs, evergreen branches or pine straw. Remove winterizing mulch covering the plants in spring as growth resumes. Put it between the strawberry rows.   Strawberry plant grow well in containers since they have a shallow root system. Day neutral strawberry plants can be grown as houseplants and produce fruit  if they are given enough light. The minimum amount of light required to grow berries is six hours of sunlight a day. You may need to use artificial light during our winter months.