Shopping for a water softener: 1  Salt-based units need to have the salt replenished on a regular basis, usually at a cost of anywhere from $2-$15 a month depending on the cost of the salt ($3-$8 per 40-pound bag) and the amount of salt used by your system.
Milkweed is the common name for perennial, herbaceous plants of genus Asclepias, family Asclepiadaceae (from Greek physician Asclepius). One hundred species occur worldwide; 13 are native to Canada.
Asclepias cordifolia also has the common name of Heart-leaf milkweed. Heart-leaf milkweed is native to California, Nevada, and Oregon while Asclepias purpurascens is native to central and eastern US and Eastern Canada.