Should I wait until there have grown a few leaves or just transplant it right away? On the picture you can see that the top part has turn brown. Is that normal? Should I not leave my plant in direct sunlight?
planting a seedling insures a 99% chance of inferior fruit. Quality fruit trees are all grafted to insure a clone of the mother tree. You can get a healthy/nice tree, however. Let the main shoot (trunk) develop to at least 6-10 inches tall...and slowly introduce to direct and mild sunlight.