Growing Morning Glory in Zone 3B

Morning glories are fast-growing vines that cover a trellis in weeks, bearing trumpet-shaped flowers that open each morning and close by afternoon.

Zone 3B has a short growing season — start seeds indoors when possible and use season-extending techniques like cold frames and row covers.

Top Growing Tips

• Nick or soak seeds in water for 24 hours before planting for faster germination
• Direct sow after last frost — does not transplant well
• Blooms best in poor to average soil — rich soil promotes leaves over flowers
• Self-seeds aggressively and can be invasive in warm climates
• Flowers close in afternoon and don’t open on cloudy days

Companion Planting

Good companions: pole beans, squash, corn (use on same trellis structure)

Avoid planting near: Rich, heavily-amended soil

Harvest Timeline

Ornamental; collect seeds before pods split for replanting

About Zone 3B

USDA Hardiness Zone 3B has an average last spring frost around May 15 and first fall frost around Sep 15. All planting dates above are calculated from these frost dates. Your specific location may vary — check with your local extension office for the most accurate dates.