Part 1 Easy Way
The flower's size and leaf size will vary depends on the container you use. Use what you prefer. (If you use food container, then it will grow small) The flower will bloom one by one until 5 (Average) (Will not bloom all at once)
Fill the container with a lot of water and put the seed.
Change the water whenever you feel it is necessary, example when it seems dry out, just be remind to keep the water level at certain range. You can also change the water if the water is dirty, it will not affect.

Part 2 Way to Lower down the failure percentage and make it up bloom again next year
Using pudding cup and fill it full with sand(not soil). Put the send in the middle of the sand. (Colorful sand is OK too)
Then, prepare the container that you want to grow the plant with a lot of water. Slowly put in the pudding cup just now down in to the container. (Means you will have cup in the container)
By using the way, you can change the water more easily and the flower will grow in the small cup instead.

Use liquid based fertiliser to Part 1 and Part 2. Apply 1-2 times montly.(You can put more than one seed in the container)

*Unused seed can be keep for 3 years time in room tempature