Growing Impatiens in Zone 3B

Impatiens are the go-to annual for shady spots — they thrive where sun-lovers fail, producing mounds of color with minimal effort.

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

• The premier shade annual — tolerates deep shade better than almost any other
• Keep consistently moist — wilts quickly but recovers when watered
• New Guinea impatiens tolerates more sun; standard types prefer shade
• Pinch to promote bushier growth early in the season
• Watch for downy mildew — improve air circulation if foliage yellows

Companion Planting

Good companions: hostas, ferns, begonias, caladiums

Avoid planting near: Full sun (causes wilting and sunscald)

Harvest Timeline

Ornamental; no deadheading required — self-cleaning

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.