Bigleaf hydrangeas: What you need to know
Type of flowers: Early summer flowers bloom in white, blue, purple or pink, depending on variety and soil. Two flower head shapes: rounded mophead and flat lacecap.
Where to plant: Grow in partial sun to shade with 1-2 inches of water per week. For blue flowers, add aluminum sulfate to soil, following package directions.
What to watch for: Can be vulnerable to late spring frosts. Overfertilizing, overwatering and a lack of sun can delay or prevent blooms.
Recommended types: Try mopheads 'Lemon Daddy' and Cityline series, plus rebloomers Endless Summer, Blushing Bride, Forever & Ever series, Let's Dance series and Mini Penny. Try lacecap Light-O-Day and rebloomers Let's Dance Starlight and Twist-n-Shout.
Zone: Generally as far north as Zone 5 or 6; some hardy in Zone 4 with winter protection.