Get your garden started early by planting your seeds in eggshells indoors before the weather permits outdoor growth. There are several reasons why eggshells are the perfect pot for this, but the biggest is that they are cheap (free really), full of calcium to give your seedlings that extra boost, and easy to plant in the garden when ready (the shell can stay on!).
An Almost Foolproof Way to Grow an Avocado Plant from a Seed
An Almost Foolproof Way to Grow an Avocado Plant from a Seed, also very good information on pruning, so the plant does not grow into a three foot high stick with a couple of leaves. Downing I know you wanted to grow an avocado tree