PlantingMilkweed Plugs. Plugs can be placed directly into the ground. First, dig a small hole to fit the roots and soil of the pottedmilkweed plug/plant that you have. Mature plants nearly take care of themselves and need little tending. Pollination Station gave me a pottedmilkweed. Butterfly MilkweedPlant. Showy Milkweed Benefits.milkweed and milkweed leaves with text overlay that reads milkweed seeds learn 6 truthing about this valuable plant. If you are in doubt, plant your milkweed in containers with a quality potting soil like FoxFarm Happy Frog mixed with a lot of perlite (kind of like a succulent potting soil). How many milkweed seeds should I plant? Sow 2 to 3 seeds in a pot filled with seed-starting mix, cover with ¼ inch of mix, water lightly and set under lights. Germination takes 7 to 10 days. Container Grown MilkweedPlants. There are more than 100 species of milkweeds that grow in North America, and not all of them are hosts for the Monarch. If you are using pottedmilkweeds, plant them after the last frost so that they do not die before the monarch’s mating season. Plantpottedmilkweeds in spring after the danger of frost is past. Pottedplants should be planted at the same depth as they were growing in their containers. choice to plant tropical Milkweed or a native variety, please pick a native one, three, or five. Providing a diverse array of milkweeds isn't just beneficial to caterpillars who feed on them but also... Even better, are the butterfly plants that serve both purposes. But why would you want to grow milkweed in containers? 1. Portability. Put pots on raised beds... One plant can live in a 14- to 16-inch container. Milkweedplants do not like to be soggy, so the pot must have drainage. Planters can be made from any material. MilkweedPlantPlant Care. Milkweedplants, belonging to the Asclepias genus, thrive in well-drained soils with moderate moisture, making them adaptable to both rich and poor soils. Potting and Repotting Tropical Milkweed. Tropical milkweed adapts well to container-growing, as long as you plant it in a tall 1-gallon container to fit its taproot. If you DO plant curassavica, many scientists suggest cutting it to the ground in winter–unless yours is a research site like the Milkweed Patch on the San Antonio River Museum Reach.