How to grow Butterfly weed 'Red and yellow'
Try to plant in a location that enjoys full sun and remember to water very sparingly. Keep in mind when planting that Red and yellow is thought of as hardy, so this plant will survive close to or on freezing temperatures. Red and yellow needs a sandy and loamy soil with a ph of 4.8 to 6.8 (moderately acidic soil to weakly acidic soil).
Growing Red and yellow from seed
Soil temperature should be kept higher than 18°C / 64°F to ensure good germination.
Transplanting Red and yellow
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Red and yellow is a hardy plant.
Harvesting Red and yellow
This variety tends to be ready for harvesting by early summer.
During WWII the silky part attached to the seeds was used for life jackets. Milkweed is more bouyant then cork by 5 or 6 fold.
Footnotes