Some Reasons Why a Graft Fails
*The scion and stock were incompatible; apple will not unite with plum, for example.
*The grafting was done at the wrong season.
*The understock was not healthy.
*The scions were not vigorous.
*The scions were dry or injured by cold temperatures.
*The scions were not dormant.
*The plant was drought stressed and the scion died before an adequate connection was made.
*The cambium of scion and stock were not properly connected.
*The scion was attached upside down.
*The graft was improperly covered with grafting compound.
*The scions were displaced by wind, birds, or storms.
*The graft was shaded too much after growth began.
*New growth was damaged by aphids or other insects.
*New growth was killed by fire blight.
*The union girdled because the bindings or label were not released in time.

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