Don't let the common name fool you; tall green milkweed is similar in height to spider milkweed and butterfly weed, and it is dwarfed by the taller common milkweed and swamp milkweed. The pale green flowers of Asclepias hirtella form "globoid umbels" reminiscent of fireworks exploding. Close examination of the flowers yields tinges of white and purple. Bees and wasps are the main pollinators, but butterflies, moths, and beetles will also visit in search of nectar. Monarch butterfly caterpillars will not be disappointed in Tall Green Milkweed as it has ample foliage when monarchs are present.
While some milkweeds, such as common (A. syriaca) and whorled (A. verticillata), spread underground to form large colonies, tall green milkweed has a taproot and only spreads when its seed lands in just the right spot. The right spot for this wildflower is sunny and well-drained.
Boom time: June - July
Height: 24 to 36 inches
Space: 18 to 20 inches
Sun: Full sun
Moisture: Average to dry
Seed: Best practice is to sow November through January or provide at least 30 days cold, moist stratification.
- 200 seeds per packet
- 4,300 seeds per ounce
- 1 ounce per 140 square feet
