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.
1 These are the seeds that win awards, buy fresh! 2  Haze seed strains â True âHazeâ seeds are magically pure sativas, we love them; 3  White seed strains â Includes the famous White Widow and White Rhino strains; 4  Blue seed strains â Include the famous Blueberry and Blue Cheese strains and taste great.