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.
Giant Grey-Stripe Sunflower Seeds. The biggest and the best! Our Giant Grey-Stripe sunflower is the sunflower to beat all others! If you've ever eaten a sunflower seed in your life, chances are this is the cultivar that produced it.ur Giant Grey-Stripe sunflower is the sunflower to beat all others! If you've ever eaten a sunflower seed in your life, chances are this is the cultivar that produced it.