Seeds come in many sizes and shapes. Some are soft; others are hard. Their longevity varies depending on the species. Some do not stay alive for long, while some others can live really long.
The germination of certain seeds has to take place within four or five days after their maturity. The seeds die if germination does not take place in time. However, in cooler climates, seeds have to stay alive longer because they have to wait until the climate becomes conducive for germination. Therefore, nature has designed some species in such a way that their seeds last thousands of years at a stretch. Do you know that the seeds of Arctic Lupus plants archaeologists found from a burrow were as old as 10,000 years? They were live seeds, which sprouted and grew into plants once they came in contact with water and soil!
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