You will have to use the World map now to enter your Tropical farm.
You will also use the map to keep up with any needed information.
  #1 - Lets you know something on the farm is ready to be harvested.
  #2 - Lets you know that Omar or Monty are on the farm.
  #3 - Lets you know how many days are left for the farm.
  #4 - Click on this icon to see the Event Overview window and your Ranking.
  #5 - Click on this icon to see the Event Information window.
  In this overview, you can see all the stages of the event. First visit Johnny Apple on his tropical farm. Help him set up his farm and sell tropical gear to earn seashells, which you can then exchange for valuable seeds with the seashell trader. When you sow these seeds in the greenhouse, you'll grow Tropical fruits that Captain Barmacle will ship. As a thank you, he'll give you a reward you can use to train your horses. Remember that you can only reach the tropical farm event via the ice bridge, which last for 24 days. 

UPDATE MARCH 2017: The Tropical farm was shortened from 30 to 24 days.

UPDATE April 2017: You may now purchase seaweed products, tools, tokens and deco parts from the seashell trader.