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.
Taxonomy of Milkweed Plants: Plant taxonomy classifies common milkweed plants as Asclepias syriaca. Plant Type: Milkweed plants are herbaceous perennials. Characteristics: Common milkweed plants are tall (3 feet), thin, summer-bloomers.ther Types of Milkweed Plants: Many find butterfly weed (Asclepias tuberosa), with its bright orange flowers, a more attractive type of milkweed than the common milkweed.