Plant tissue culture is a technique used to grow new plants from small pieces of plant tissue in a controlled environment. This method allows for the rapid multiplication of plants, ensuring that they are disease-free and genetically identical to the parent plant. It involves placing the tissue in a nutrient-rich medium that provides the necessary hormones and nutrients for growth. The process typically starts with selecting a healthy plant and taking a small sample, such as a leaf or stem. This sample is then sterilized to prevent contamination and placed in a growth medium under specific conditions of light and temperature. Over time, the tissue develops into new plants, which can be transferred to soil for further growth.