Seed Packet Reads:
 
Swamp Milkweed is native to Southern Ontario and is a great wetland plant for the edges of ponds or for the garden. Excellent habitat plant for Monarch Butterflies. Pinkish crimson flowers appear on its miniature tree-like form and sturdy trunk from early sowings. Requires full sun and does best in sandy soils. Heigh up to 60 cm (2').
 
How to grow: Sow seed in early March indoors for late summer flowering the following year. Germinate at 20C for 21-28 days. Direct fall sowing outdoors is also effective.
 
https://www.oscseeds.com/product/red-swamp-milkweed-6985/
 
Ball Culture Guide: For Asclepias incarnata
Germination Temperature: 21-24 C (70-75 C)
Days to Geminate: 21-28
Sow to Sell: 11-13 (green packs) (1.-2 plants per gal.) (February 11-25)