Editing Plant propagation (section)

==Sexual propagation==
[[Image:GrowingAvocadoFromSeed.JPG|thumb|One way to germinate an [[avocado]] seed]]

{{Further|Germination}}
Seeds and [[spore]]s can be used for reproduction (e.g. [[sowing]]). Seeds are typically produced from [[Plant sexuality|sexual]] reproduction within a species because [[genetic recombination]] has occurred. A plant grown from seeds may have different characteristics from its parents. Some species produce seeds that require special conditions to germinate, such as [[Stratification (botany)|cold treatment]]. The seeds of many [[Australian flora|Australian plants]] and plants from southern [[Africa]] and the [[United States|American]] west require smoke or fire to germinate. Some plant species, including many [[tree|trees]], do not produce seeds until they reach maturity, which may take many years. Seeds can be difficult to acquire, and some plants do not produce seed at all. Some plants (like certain<ref>[https://books.google.com/books?id=UOJ3UD_1jDgC&pg=PA5 Hybrids of plant species being sterile, hybrids of same species are not]</ref> plants modified using [[genetic use restriction technology]]) may produce seed, but not a fertile seed.<ref>[http://science.slashdot.org/story/13/02/19/2212256/monsantos-terminator-seeds-set-to-make-a-comeback GMO plant made to produce infertile seeds]</ref> In certain cases, this is done to prevent the accidental spreading of these plants, for example by birds and other animals.<ref name="a">{{cite book |last1=Moore |first1=Kathleen A. |last2=Bradley |first2=Lucy K. |title=North Carolina Extension Gardener Handbook: Second Edition |date=February 2022 |publisher=University of North Carolina Press |isbn=978-1-4696-6973-1 |pages=Chapter - 13 |url=https://books.google.com/books?id=ZAGwzgEACAAJ |language=en}} [https://content.ces.ncsu.edu/extension-gardener-handbook/13-propagation#section_heading_5635 '''Read online''']</ref>