Annabelle Hydrangea Shrub

Hydrangea arborescens 'Annabelle' is a long-established selection of the native smooth hydrangea, forming a rounded shrub about 3–5 feet tall and wide. Its large flower clusters open green, turn white and gradually fade to tan; the bloom period often lasts six to eight weeks through June and July, and dried heads add fall and winter interest. [Illinois Extension](https://extension.illinois.edu/news-releases/showy-annabelle-hydrangea-has-historic-roots-illinois) documents its flowering and Illinois origin. ## Site and garden use Grow Annabelle in partial shade, or in full sun where the soil stays moist. Rich, moist but well-drained soil supports the best growth. It suits a border, mass planting or specimen position; smooth hydrangeas are also often used as informal hedges. Illinois Extension reports a broad USDA range of zones 3–9. ## Pruning Annabelle flowers on new wood. Prune in fall, winter or early spring while dormant, before new growth begins. Cutting the shrub very low can leave young stems too weak to hold the large flower heads; leaving an 18–24 inch framework encourages older stems to thicken. [UConn's hydrangea guide](https://homegarden.cahnr.uconn.edu/factsheets/hydrangea/) discusses this approach for Annabelle-type hydrangeas. ## Origin Harriet Kirkpatrick found the plant growing near Anna, Illinois, in 1910. University of Illinois professor Joseph C. McDaniel named it and released it commercially in 1962. ## Maintenance Water through dry periods, especially in full sun. Keep the soil moist but well drained, and remove spent heads or dead stems during seasonal cleanup if you prefer a tidier appearance.