General Plant Information (Edit)
Plant Habit: Herb/Forb
Vine
Life cycle: Perennial
Sun Requirements: Full Sun
Full Sun to Partial Shade
Water Preferences: Mesic
Soil pH Preferences: Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Slightly alkaline (7.4 – 7.8)
Minimum cold hardiness: Zone 10a -1.1 °C (30 °F) to +1.7 °C (35 °F)
Maximum recommended zone: Zone 11
Plant Height: 2-3 feet
Plant Spread: 2-3 feet
Leaves: Evergreen
Broadleaf
Fruit: Showy
Other: Up to 12 inch long slender boat-shaped pod.
Flowers: Showy
Flower Color: Blue
Bloom Size: Under 1"
Flower Time: Summer
Late summer or early fall
Uses: Suitable as Annual
Resistances: Drought tolerant
Propagation: Other methods: Cuttings: Stem
Containers: Needs excellent drainage in pots
Miscellaneous: Tolerates poor soil
Awards and Recognitions: RHS AGM

Image
Common names
  • Blue Milkweed
Botanical names
  • Accepted: Oxypetalum coeruleum
  • Synonym: Tweedia coerulea
  • Synonym: Amblyopetalum coeruleum
Also sold as:
  • Oxypetalum caeruleum
  • Tweedia caerulea

Photo Gallery
Location: Western Washington
Date: 2024-11-28
Location: Indiana zone 5
Date: 2014-07-13
Location: Indiana zone 5
Date: 2014-09-30
ripe pods
Location: In my Northern California garden
Date: 2015-05-12
Location: Indiana zone 5
Date: 2014-07-13
Location: Arroyo Grande, CA
Date: 2017-05-14
Four year old plant .  .  . wow!
Location: Summeville, SC
Close up of flower center with bonus bugs attached!
Location: All pictures taken in/on my gardens/greenhouse/property
Date: 2022-06-07
Location: Arroyo Grande, CA
Date: Summer
Location: Summeville, SC
Seed Pods & Seeds
Location: Central Arkansas
Date: 2016-02-04
Blue Tweedia 3 week old seedlings
Location: Summeville, SC
Plant Events from our members
MrsBinWY On May 13, 2019 Potted up
22 pots, some w/2 plants in the pots
MrsBinWY On March 17, 2019 Seeds germinated
1
MrsBinWY On March 10, 2019 Seeds sown
25 seeds from Domehome(dee)'s 2014G in milk jug @ warm room temp
» Post your own event for this plant

Discussion Threads about this plant
Thread Title Last Reply Replies
Love that photo! by pirl Sep 30, 2014 7:01 PM 2

« Add a new plant to the database

« The Plants Database Front Page