Editing Lilium (section)

===Propagation and growth===
Lilies can be propagated in several ways;
* by division of the bulbs
* by growing-on [[bulbil]]s which are [[adventitious]] bulbs formed on the stem
* by scaling, for which whole scales are detached from the bulb and planted to form a new bulb
* by seed; there are many [[Lily Seed Germination Types|seed germination patterns]], which can be complex
* by [[micropropagation]] techniques (which include [[Plant tissue culture|tissue culture]]);<ref>[https://web.archive.org/web/20090325212420/http://www.hcmuaf.edu.vn/ctt/softs/phtqt/biotech2006/papers/nonghoc/DTNhut4.pdf Duong Tan Nhut, Nguyen Thi Doan Tam, Vu Quoc Luan, Nguyen Tri Minh. 2006. Standardization of in vitro Lily (Lilium spp.) plantlets for propagation and bulb formation. Proceedings of International Workshop on Biotechnology in Agriculture, Nong Lam University (NLU), Ho Chi Minh City, Vietnam, page 134-137.] Retrieved January 25, 2014</ref> commercial quantities of lilies are often propagated [[in vitro]] and then planted out to grow into plants large enough to sell. A highly efficient technique for multiple shoot and propagule formation was given by Yadav et al., in 2013.<ref>{{Cite journal |last1=Yadav |first1=Rakesh |last2=Yadav |first2=Neha |last3=Pal |first3=Minakshi |last4=Goutam |first4=Umesh |date=December 2013 |title=Multiple shoot proliferation, bulblet induction and evaluation of genetic stability in Asiatic hybrid lily (Lilium sp.) |url=http://link.springer.com/10.1007/s40502-014-0060-4 |journal=Indian Journal of Plant Physiology |language=en |volume=18 |issue=4 |pages=354–359 |doi=10.1007/s40502-014-0060-4 |bibcode=2013InJPP..18..354Y |s2cid=17091557 |issn=0019-5502}}</ref>

Plant grow regulators (PGRs) are used to limit the height of lilies, especially those sold as potted plants. Commonly used [[Chemical substance|chemical]]s include ancymidol, fluprimidol, paclobutrazol, and uni-conazole, all of which are applied to the foliage to slow the biosynthesis of [[gibberellin]]s, a class of [[plant hormone]]s responsible for stem growth.<ref>{{Cite book |last1=Kamenetsky |first1=Rina |url=https://books.google.com/books?id=5B-ucdbgA3wC&pg=PA309 |title=Ornamental Geophytes: From Basic Science to Sustainable Production |last2=Okubo |first2=Hiroshi |date=2012-09-17 |publisher=CRC Press |isbn=978-1-4398-4924-8 |language=en}}</ref>