| Common Name | Tweedia, Blue Milkweed |
| Genus | Oxypetalum |
| Species | Oxypetalum coeruleum (formerly Tweedia caerulea) |
| Family | Apocynaceae |
| Life Cycle | Tender perennial, typically grown as an annual in cooler climates. |
| Tray Size | 50, 125 |
| Plug Care | Plant plugs soon after arrival. Maintain consistent moisture but avoid waterlogging. Do not allow to become stressed or rootbound before planting out. |
| Netting / Staking | Netting is not required but plants do have a sprawling habit and will tangle. A layer of netting will help keep stems upright and may help keep them less tangled at time of harvest. |
| Temperature Range | Prefers temperatures between 65-75°F. Sensitive to frost; hardy in USDA Zones 8 to 10. |
| Spacing | Space plants anywhere from 6 to 12 inches apart to accommodate their growth habit. |
| Soil Preference | Thrives in well-drained soil with moderate fertility. Tolerates a range of soil types but prefers slightly acidic to neutral pH. |
| Day Length | Day-neutral plant; daylength does not affect flowering. Full sun to partial shade; at least 6 hours of direct sunlight daily. |
| Pinching | Pinch active growth tip when plugs have reached 4-5 inches in height to encourage bushier growth and more blooms. |
| When to Plant | Plant outdoors after the danger of frost has passed in the spring. |
| Harvesting | Harvest stems when the first flowers are fully open and some buds remain closed for optimal vase life. Tweedia are in the milkweed family and exude a thick, milky sap when cut which can irrigate sensitive skin. |
| Post Harvest Care | Place cut stems in clean water immediately. Use of floral preservatives can extend vase life. Some growers struggle with wilting stems after harvest and use a hot water treatment (placing cut stems in a couple inches of hot - not boiling - water after harvest) or treatment with a flame to help with hydration/conditioning. Some trials might be required to see what post-harvest care works best for you. Once conditioned, stems can last over a week in the vase. |
| Diseases / Insects | Generally pest-resistant. Monitor for aphids and spider mites. Ensure good air circulation to prevent fungal issues. Leaves are slightly velvety which help with a certain degree of natural defense. |
| Bailey's Notes | Tweedia thrives in the field, but if you can spare space in your hoophouse, you'll be rewarded with taller stems and superior-quality blooms. In the field, rain may cause pink or purple discoloration on the delicate blue flowers. We offer several varieties, including a striking white and a captivating double form. Keep in mind, the double variety may include plants with single or semi-double flowers - but all are undeniably beautiful. |
| Resources | NA |