Grafted mango trees consist of a scion and a rootstock. Using grafting tape, the rootstock and scion are pressed closely together at the point where a veneer cut, which exposes the actively growing cambium region, has been made on each section. The graft should begin to grow in 10 to 21 days.
The scion is a piece of mature tree that is transferred to a seedling to form the canopy. The rootstock is an immature seedling, which becomes the lower trunk and roots. Seedlings from polyembryonic seeds should be used as rootstock as they are more uniform.
Grafting is best done when temperatures are warm. When choosing a rootstock, it is best to choose one that has a diameter of at least a pencil's width. Trees that are in active growth are the best source of scions. To collect a scion, harvest the last two to three inches of a twig whose terminal bud is beginning to enlarge.
Veneer grafting occurs when all the leaves of the scion are removed. Alternatively, cleft grafts and some other techniques leave a few of the leaves on the plant. Scions can be stored for up to 10 days if they are kept at a temperature of 10 degrees Celsius.