Plants with dormant seeds give rise to more species. National Evolutionary Synthesis Center, April 18, 2014. Seeds that sprout as soon as they’re planted may be good news for a garden. But wild plants need to be more careful. In the wild, a plant whose seeds sprouted at the first warm spell or rainy day would risk disaster. More than just an insurance policy against late frosts or unexpected dry spells, it turns out that seed dormancy has long-term advantages too:  Plants whose seeds put off sprouting until conditions are more certain give rise to more species, finds a new study.