Troubleshooting
Sullivant's Milkweed problems — and how to fix them
Sullivant's Milkweed (Asclepias sullivantii) is generally low-drama, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Aphid colonies on stems and buds
Bright yellow oleander aphids (Aphis nerii) are a near-universal pest on milkweeds; tolerate modest colonies as they support predator populations, or remove by hand to protect flower buds.
Poor establishment from transplant shock
Asclepias sullivantii develops a deep taproot and resents disturbance; plant container-grown stock in spring and water consistently for the first full season to prevent transplant failure.
Prevent sullivant's milkweed problems before they start
Most sullivant's milkweed issues are care-mismatch, not bad luck. Dial in the basics:
Sullivant's Milkweed problems — FAQ
Why is my sullivant's milkweed aphid colonies on stems and buds?
Bright yellow oleander aphids (Aphis nerii) are a near-universal pest on milkweeds; tolerate modest colonies as they support predator populations, or remove by hand to protect flower buds.
Why is my sullivant's milkweed poor establishment from transplant shock?
Asclepias sullivantii develops a deep taproot and resents disturbance; plant container-grown stock in spring and water consistently for the first full season to prevent transplant failure.