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 is essential for the existence of Monarch butterflies. A Monarch butterfly is pictured at the top of this page. Adult Monarchs (and many other butterfly species) love nectar-rich milkweed as a food source, but there is a more important reason for the Monarch's close attachment to milkweed.ome northeasterners assume common milkweed to be the only milkweed species which exists. Actually, over 100 species of Asclepias grow in the USA, with over 200 different species growing worldwide. Common milkweed is not the only Asclepias species which can be utilized as a food source for the monarch caterpillar.