Garden geraniums (Pelargoniums) are some of the longest-blooming annuals available — and unlike most annuals, you can overwinter them indoors for years.
Zone 3B has a short growing season — start seeds indoors when possible and use season-extending techniques like cold frames and row covers.
Good companions: roses, marigolds, petunias
Avoid planting near: Overwatering — most common cause of decline
Ornamental; harvest scented leaves anytime for culinary or aromatic use
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.