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.
Unfortunately, most of the milkweed purchased for this purpose is the âwrong kind.â This kind, known as tropical milkweed, is popular with gardening companies since it continues to bloom longer than the type to which monarch butterflies are accustomed.