Salvia is a diverse genus with hundreds of species — all attractive to hummingbirds and butterflies, and most extremely heat and drought tolerant.
Zone 4A has a short growing season — start seeds indoors when possible and use season-extending techniques like cold frames and row covers.
Good companions: roses, lavender, echinacea, ornamental grasses
Avoid planting near: Wet, poorly-drained sites
Ornamental; deadhead spent spikes to encourage rebloom
USDA Hardiness Zone 4A has an average last spring frost around May 8 and first fall frost around Sep 25. 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.