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.
Swamp Milkweed is a U.S. native that usually grows in moist areas (but it does not require a moist location in the garden). Usually blooming June thru July, this plant serves as a nectar source for several butterfly species and as a host plant for Monarchs. Deer resistant. Perennial, zones 3-8.