ps treat a broken stem like a broken leg....

straighten it back into place and then add a touch of vasaline to keep in moisture... and to stop the tape sticking to the branch.

now wrap securly but not tightly in electrical tape. secure the branch in place with supports.
leave for 2weeks and then remove....

the break should have healed nicly....

if not remove the broken stem as it will not mend after 2weeks...imo:thumbsup: