A plant usually germinates, flowers, and falls in a year or that season to make it an annual plant. Those prevented from setting seed will live longer than a year and may make annuals although they do not flower. Making annuals referred to plants grown outdoors in the spring and summer thus to survive just that growing season. As are most of the food plants, or are grown as annuals, as the domesticated grains.
Typically low to the ground grow winter annuals germinating in autumn or winter when the soil temperature is cool, usually sheltered from the coldest nights by a snow cover and using warm periods in winter for growth when the snow melts to provide vegetative cover to prevent soil erosion during winter and early spring when no other cover exists and to provide fresh vegetation for those that feed on them.
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