Persephone (purr-sef-un-ee) is the Greek goddess of springtime. She is wife to Hades (unwillingly) and the only daughter of Demeter, the goddess of the harvest.
Nymphs and Dryads
A minor nature goddess who is usually a young maiden is called a nymph.
nymphs were the godesses of nature
Demeter, in Greek Mythology, is the Goddess of nature, fertility of the Earth, the seasons, and harvests.
Cybele i believe
Hebe was the goddess of youth. She was also the goddess of rainbows.
Freyja was the goddess of beauty and fertility. She was known as a role model for all young girls (in spite of her tempestuous nature).Freya is the goddess of love, beauty, and fertility.
They are known as nymphs.Also, if you are looking for a singular "beautiful young goddess of nature," it might be Persephone.The Nymphs were the young beautiful goddesses of nature.The main Nymph was Pan.
Pandora was not a Greek goddess, but a mortal woman. Anyway, she was a young lady, probably about 20. She had an inquisitive nature, and physical features are unknown.
The original Goddess of earth is Hera and the Goddess of nature is Artemis.
Persephone the Greek goddess of flowers nature and spring
Athena was the goddess of wisdom and battle. She did not directly effect nature.
Nature