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.
Why buy Pure Live Seed (PLS)? Buying seed by Pure Live Seed weight means you are only paying for seed you are guaranteed can germinate. You are not paying for seeds that are not viable, empty hulls, weed seeds, and stems and leaves. The seed has a certified test telling you exactly what is in the bag.