Some people with chest pain have normal or minimal narrowing of heart arteries; in these patients, vasospasm is a more likely cause for the pain, sometimes in the context of Prinzmetal's angina and syndrome X.
You are here. Pure Live Seed. Pure live seed (PLS) is a measure used by the seed industry to describe the percentage of a quantity of seed that will germinate. PLS is obtained by multiplying the purity percentage by the percentage of total viable seed, then dividing by 100.
2. Break open the pods and drop the seeds into a glass or cup. Fill the cup halfway with water. The seeds that float are sterile, and won't grow. Skim off the floating seeds and discard them, then drain the water from the viable seeds on the bottom of the cup.. Break open the pods and drop the seeds into a glass or cup. Fill the cup halfway with water. The seeds that float are sterile, and won't grow. Skim off the floating seeds and discard them, then drain the water from the viable seeds on the bottom of the cup.