You can protect plants on the terrace, balcony and garden from frost in winter by wrapping them in bubble wrap (blister wrap, bubble wrap). Wrap the plants individually with the film and secure the film with adhesive tape (gaffer tape) so that it is not blown away by the wind. The film should go all the way to the bottom or over the edge of the pot, this will insulate the plant and keep the plant and soil warm in winter.