At first it was because Hades was preventing her from returning. It is a rule that if you eat the food of the underworld you must stay there and she ate six pomegranate seeds so she then had to stay, but her mother was so upset that Zeus said she only had to spend six months a year there, one for every seed.
Persephone couldn't go back to the land of livingbecause she was trapped in the underworld and Hades would not let her escape!
Hope this helps :D
Because she was trapped and Hades wouldn't let her go.
Persephone had ate the pomegranate in the Underworld; so had to return to the Underworld a part of every year.
Queen Persephone and King Hades of the Underworld.
Persephone could not return to Earth because she had ate of the food of the Underworld: so below she is Queen, and above she is the goddess of Spring. Because she was the daughter of Demeter who could make all plants grow or die, Zeus the father of Persephone and brother of Hades allowed her return for a part of every year.
Persephone had eaten a pomegranate from the Underworld, the domain of Hades. It hints towards host and guest laws of ancient times and how they may have originally been linked to wives and husbands.
She had eaten 6 pomegranate seeds after being kidnapped by Hades and if you eat food in the Land of the Dead, you must remain there. Therefore Persephone must remain in the underworld for 6 months of the year.
In the myths, Demeter (Persephone's mother) is the goddess of agriculture. The coming and going of her daughter Persephone from the underworld changes the season. As you can guess, when Persephone came back to earth it was summer while when she was at her husbands (Hades) side up on Earth it was winter.
Persephone could not return to the land of the living because she had eaten pomegranate seeds in the underworld. This act bound her to spending a portion of each year in the realm of the dead, causing the cycle of seasons as she returned to her mother, Demeter, in the world above for the rest of the year.
Hades asked his brother Zeus if he could have Persephone for his bride, to this Zeus agreed without consulting Demeter or Persephone - Hades than took her, and Demeter showed her wrath until she got her daughter back, except Persephone had eaten of the pomegranate and had to return to Hades for half the year, this causes Demeter to make the land cold and barren (i.e. winter). Persephone return brings about spring.
She couldn't return to the land of the living for six months because she ate six pomegranate seeds in the Underworld.
Siphyus because he tricked Persephone into letting him go back to "The Land of The Living".
According to Greek Mythology, the reason for Spring is the return of the goddess Persephone. She spends the Winter with Hades, which is why the land is barren and cold.
Persephone was bound to the underworld because she had eaten pomegranate seeds while there. Eating food in the underworld meant she had to stay there for a portion of each year, leading to the cycle of her spending part of the year as queen of the underworld with Hades and the rest above ground with her mother, Demeter.