Hibiscus (Red): This is a favourite flower of Lord Ganesha and is called Japakusuma in Sanskrit. It is offered for overall prosperity and destruction of enemies.
Downy Jasmine: They are called nithya mullai and grow all throughout the year. It is offered for family unity.
Gokarna or Clitoria Ternatea (Blue): Gokarna is offered for blessings of early marriage.
Marigold: In India it is also called that Genda , Zendu or Chendumalli. It is a flower offered for good health.
ChrysanthemumShevanti, Chrysanthemum (Yellow): These tiny yellow flowers are offered to remove evil eyes, the bad effects of adverse forces.
Parijatha: It is also known as coral Jasmine and is a flower that blooms only at night. It sheds its petals in the day. It is offered so that the children do well in their life.
Durva: Though it is not a flower, Durva or grass is a very important offering to Lord Gaesha. The festival is incomplete without the offering of a bunch of Durva.