Wilt-Pruf Plant Protector Spray 950mlWhen evergreens have been exposed to extreme drying conditions such as frozen roots in the winter or hot drying winds in drought stricken areas, they might not have enough moisture in their foliage to survive without help. Wilt Pruf gives them the added protection they need during these long severe periods of water stress. Protects plants against cold drying winds of winter and hot drying winds of summer. Protects plants when roots are frozen in the