Milkweed Plant In The Fall. It s too warm for the ground to be frozen but too cold for seeds to sprout before winter sets in. The parasites infect the milkweed root system.
Common milkweed plants grow to about 2 to 4 feet in height with a thin vertical growth habit. Another method of milkweed pruning is to cut the plant back a third of its height. The parasites infect the milkweed root system.
Why is fall planting easier.
New plants will grow in spring. Plant seed in fall in a sunny location. In fact no milkweed plant will object if you want to give its crown and root zone some extra winter protection. Milkweed leaves turn yellow dry out and fall off.