The Bigleaf Hydrangea 'Rotschwanz' (also known as 'Red Start' or 'Redstart') is a lacecap cultivar of Hydrangea macrophylla with a German name meaning 'red tail'. It produces flat flower heads with a ring of deep red to carmine sterile florets surrounding a center of tiny fertile flowers. The color is striking and holds well in slightly acidic to neutral soils.

| Family: | Hydrangeaceae (hy-drain-jee-AY-see-ee) |
| Genus: | Hydrangea (hy-DRAIN-juh) |
| Species: | macrophylla (mak-roh-FIL-uh) |
| Cultivar: | Rotschwanz |
| Additional info: | (aka Red Start, Redstart) |
Bigleaf Hydrangea 'Lady in Red'
Bigleaf Hydrangea 'Geoffrey Chadbund' (Lacecap)
Bigleaf Hydrangea 'Strawberries & Cream': Delicious Lacecap
Bigleaf Hydrangea 'Light O Day': Variegated Lacecap with Seasonal Interest
Bigleaf Hydrangea 'Beauté Vendômoise': Heirloom Lacecap with Many Names
Bigleaf Hydrangea 'Bits of Lace': Delicate Lacecap with Fine Texture
Bigleaf Hydrangea 'Selina' (Dutch Ladies Series): Compact Lacecap with Picotee Florets
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