Without having enough space for it to grow, it would die, since as a plant grows, it spreads its roots from the bottom and grows taller and stronger from the top, if there isn't enough space, it won't be able to perform those characteristics and thus it would die.
Mendel was interested in the offspring of two different parent plants, so he had to prevent self-pollination. He removed the anthers from the flowers of some of the plants in his experiments. ... The offspring that result from such a cross are called hybrids.
