Editing Crataegus (section)

== Propagation ==
Although it is commonly stated that hawthorns can be propagated by cutting, this is difficult to achieve with rootless stem pieces. Small plants or suckers are often transplanted from the wild. Seeds require [[Stratification (botany)|stratification]] and take one or two years to germinate.<ref name="hortus">Bailey, L. H.; Bailey, E. Z.; the staff of the Liberty Hyde Bailey Hortorium. 1976. ''Hortus third: A concise dictionary of plants cultivated in the United States and Canada''. Macmillan, New York.</ref> Seed germination is improved if the [[pyrena|pyrenes]] that contain the seed are subjected to extensive drying at room temperature, before stratification.<ref>[http://www.idpan.poznan.pl/index.php/content/-vol-47-supplement.html Bujarska-Borkowska, B. (2002) Breaking of seed dormancy, germination and seedling emergence of the common hawthorn (''Crataegus monogyna'' Jacq.). ''Dendrobiology''. 47(Supplement): 61–70.] {{webarchive|url=https://web.archive.org/web/20111004040552/http://www.idpan.poznan.pl/index.php/content/-vol-47-supplement.html|date=4 October 2011}}</ref> Uncommon forms can be [[grafting|grafted]] onto seedlings of other species.<ref name="hortus" />