Growing Morning Glory in Zone 4B

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 4B 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 4B

USDA Hardiness Zone 4B has an average last spring frost around May 1 and first fall frost around Oct 1. 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.