Ways establishing viability of seeds 

• Germination test: Place a known number of seeds in a moist cloth or paper and calculate the percentage of seeds that germinate.
• Floating test: place the given number of seeds in a container of water for 15 minute; viable seeds will sink while non-viable seeds will float.
• Embryo test: Embryos are removed from the seed and placed in a nutrient solution and then observed to see how many develop further.
• Tetrazolium Test: seeds are soaked in water and then placed in a tetrazolium solution; viable seeds will stain red, indicating active respiration

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