First of all, you should not waste the seeds of avocado whenever you make salad for your daily meals. Select the healthiest seed for growing avocado plant at your home. Then wash it properly to remove the pulp from its surface and put it anywhere you like to make it fully dry.
When you observe that the seed has become dry, hold it in your thumb and index finger and identify its bottom, because it is the area from where roots will sprout. This area is a little flattened and also contains a dimple.
Now you need to take a glass and a few toothpicks. Then you should carefully insert the toothpicks in the middle of the seed and also in the space around it. Now put these toothpicks on the open mouth or the edges of the glass for suspending the seed over it.
After that, start filling the glass with water and stop when the lower half of the seed is dipped into it. Now put this glass along with seed in a window that gets direct sunlight. Make sure you keep replacing the water in the glass after every 2 to 3 days.
The seed takes a few weeks to split open from both sides. Roots will come out from the bottom and a tiny plant will start coming out from the topside of the seed.
You should not remove the glass from the window for another month because the avocado seed becomes familiar with the climate or the ratio of sun at this place. After one month, the plant will grow bigger in size and you can place it in your yard.
Remove the plant from window when it becomes 8 to 10 inches long and transplant it into an average sized container that has potting soil in it. Now you can put it anywhere in your yard or terrace.