Shop seeds & grow with confidence.
š± Planting Time:
Sow indoors 6ā8 weeks before last frost, or direct sow outdoors in early spring or fall.
Cold stratification recommended for better germination (2ā4 weeks in moist paper towel in refrigerator).
šæ Germination Time:
Typically 7ā21 days under optimal conditions (70ā75°F / 21ā24°C).
āļø Light Requirements:
Full sun is ideal.
šø Blooming Period:
Blooms from mid to late summer (June to September).
š Mature Size:
Grows 2ā4 feet tall (60ā120 cm).
š¦ Benefits:
Host plant for monarch butterflies.
Attracts bees, hummingbirds, and other pollinators.
š Growing Zones:
USDA Zones 6ā10.
šæ Maintenance:
Drought-tolerant once established.
Best grown in well-drained soil.
Perfect for butterfly gardens, native landscapes, and eco-friendly spaces!
ā Adds garden color with an easy seed-starting option
ā Useful for beds, borders, containers, or mixed plantings
ā A practical choice for seasonal flower displays
ā Pairs well with other annual and perennial garden favorites
ā Good for gardeners building a more colorful outdoor space
Sow Narrowleaf Milkweed in spring, fall where it can receive full sun. Keep the seedbed evenly moist until germination, usually 10-21 days.
Grow plants to about 24-48 in. and plan for blooms in about 90-120 days.
Best suited to USDA zones 3A-9A. Adjust sowing time for your local frost dates and summer heat.
Tips for sowing, growing and enjoying your next seed order.
Read the Guide
Join our gardening list for planting tips, seasonal seed picks, and exclusive offers.
Join our gardening list for planting tips, seasonal seed picks, and exclusive offers.