What is the difference between PLS and bulk seed?
This is an important, and often overlooked, question. The amount of wildfower seed that you actually get when you buy depends upon how that particular company sells its seed. There are three ways that seed can be sold: Bulk. Wildflower seed that is sold on a bulk basis means that if you buy 1 pound of seed, the supplier gives you exactly one pound of “seed”, without any regard to its quality. This means that you are buying impurities, weed seeds, and chaff, all under the title of “seed”. The pricing of such companies appears lower at first glance, but this is deceiving, as shown in the example below. PLS. Wildflower seed that is sold on a PLS (Pure Live Seed) basis means that only the good, germinable seed is considered in the weight of the seed. The impurities, weed seeds, and chaff are all removed from the final weight by the following formula: purity rate x germination rate = % PLS. Obviously the seed would need to be laboratory tested in order to be sold in this way. For example, i
