Eirinen: Gwahaniaeth rhwng fersiynau

Mae'n bosib mai eirin oedd un o'r ffrwythau cyntaf i gael eu hamaethu gan fodau dynol.<ref>{{Cite book|title=Horticultural Reviews (Volume 23)|publisher=Wiley|year=1998|isbn=978-0471254454|editor-last=Jules Janick}}</ref> Darganfuwyd olion eirin mewn safloedd archeolegol o [[Oes Newydd y Cerrig]] ynghyd ag [[olewydd]], [[grawnwin]] a [[ffigys]].<ref>{{Cite web|url=http://www.hort.purdue.edu/NEWCROP/pdfs/origins-fruit-growing-breeding.pdf|title=The origins of fruits, fruit growing and fruit breeding|publisher=Purdue University|last=Jules Janick|year=2005|archiveurl=https://web.archive.org/web/20130521204917/http://www.hort.purdue.edu/newcrop/pdfs/origins-fruit-growing-breeding.pdf|archivedate=2013-05-21|deadurl=no}}</ref><ref>{{Cite journal|title=Chemical analyses of organic residues in archaeological pottery from Arbon Bleiche|last=Spangenberg|date=January 2006|journal=Journal of Archaeological Science|issue=1|doi=10.1016/j.jas.2005.05.013|volume=33|pages=1–13}}</ref>

 

Wrth gynhyrchu eirin yn fasnachol mae'r coed yn cael eu tyfu i faint canolig, tua 5-6 medr o uchder. Mae'r goeden o galedwch canolig.<ref>{{Cite web|url=http://www.hort.purdue.edu/newcrop/Crops/Plum_prune.html|title=Plum, prune, European type|publisher=Purdue University|year=1999|archiveurl=https://web.archive.org/web/20120412183755/http://www.hort.purdue.edu/newcrop/Crops/Plum_prune.html|archivedate=2012-04-12|deadurl=no}}</ref> Heb eu tocio, gall y coed gyrradd 12 medr o uchder ac ymestyn i 10 medr o ddiamedr. Maent yn blaguro mewn gwahanol fisoedd o'r flwyddyn mewn gwahanol rannau o'r byd: ym mis Ionawr yn Taiwan, ac ar ddechrau mis Ebrill yng Nghymru, er enghraifft.<ref>{{Cite web|url=http://www.pfaf.org/user/Plant.aspx?LatinName=Prunus+domestica|title=Prunus domestica Plum, European plum PFAF Plant Database|website=pfaf.org|archiveurl=https://web.archive.org/web/20121122110734/http://pfaf.org/user/Plant.aspx?LatinName=Prunus+domestica|archivedate=2012-11-22|deadurl=no}}</ref>