Asclepias species its milky, irritating sap and strong attractiveness to Monarch butterflies and a host of other insects. Very tolerant of dry conditions, it is also called Green Antelopehorn. Spider Milkweed features rose-white flowers surrounded by green that form in showy umbellated clusters, often one per plant. Its beauty and tendency to spread slightly make it a good garden choice. Germination requires moist cold stratification: Place your Milkweed seeds in a damp paper towel inside a ziplock bag. Don't forget to label the bag with the date and type of seed. Store the mixture in the refrigerator (33–38F) for 30 days. Plant them in seed trays, peat pots, small pots or any other container that allows for water drainage. Once the soil is damp, place 1-2 seeds into each container. Sow seeds lightly on the top of the soil, or barely cover with soil.