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.
Milkweed perennials (Asclepias spp.) bear many small star-shaped flowers and produce a milky sap; they are named for this sap. The plants grow in U.S. Department of Agriculture hardiness zones 3 to 10 and bloom in summer, bearing their flowers in broad, flattened clusters at the branch tips. All varieties produce silky seeds within inflated seed pods. Milkweed thrives in a sunny location with sandy soil and offers benefits to insects.