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Cold stratification simulates the natural process by subjecting seed to a cool (ideally +1 to +3 °C [34 to 37 degrees Fahrenheit]) moist environment for a period one to three months. Seeds are placed in a medium such as vermiculite , peat , or sand and refrigerated in a plastic bag or sealed container. [ 1 ]
The seeds of some milkweeds need periods of cold treatment (cold stratification) before they will germinate. [12] To protect seeds from washing away during heavy rains and from seed–eating birds, one can cover the seeds with a light fabric or with an 13 mm (0.5 in) layer of straw mulch. [13] However, mulch acts as an insulator. Thicker layers ...
The plant's seeds require a period of cold treatment (cold stratification) before they will germinate. [27] To protect seeds from washing away during heavy rains and from seed–eating birds, one can cover the seeds with a light fabric or with an 0.5 in (13 mm) layer of straw mulch. [28] However, mulch acts as an insulator. Thicker layers of ...
Growing milkweed from seed is one of the easiest ways to help declining monarch butterflies. In December 2024, the U.S. Fish and Wildlife Service proposed monarch butterflies, whose numbers in the ...
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Asclepias incarnata, the swamp milkweed, rose milkweed, rose milkflower, swamp silkweed, or white Indian hemp, is a herbaceous perennial plant species native to North America. [ 3 ] [ 4 ] It grows in damp through wet soils and also is cultivated as a garden plant for its flowers , which attract butterflies and other pollinators with nectar .
Asclepias viridis is a species of milkweed, a plant in the dogbane family known by the common names green milkweed, green antelopehorn and spider milkweed. [2] [3] [4] The Latin word viridis means green. The plant is native to the midwestern, south central and southeastern United States, as well as to the southeastern portion of the western ...
Grown from seed plants will take about two to three years to reach flowering size in average conditions. [17] The seeds do not require stratification and can be immediately planted, though in commercial growing they are generally moist stratified at 5 °C for 30–60 days because this increases the germination rate.