Some hydrangeas are cold-hardier than others. The chartreuse flowers of 'Limelight' hydrangeas age to a mellow pink as the season progresses. These amazing plant provide beautiful flowers across much of North America, making them a staple anywhere beauty is appreciated. It’s covered all summer long with loads of the large white flowers you see in the photo, on stiff stems. First, consider how much sunlight it needs. Poliuszko / Getty Images Green flowers are the little black dresses of the gardening world: they flatter all situations. Blooms Large white flowers in summer to fall Light Full sun Size 3 to 4 ft. tall and wide Hardiness Cold hardy USDA zones 3 to 9 Consider compact hydrangea Bobo. The plants are hardy to Zone 3, and it can grow 4-5 feet tall and 3-5 feet wide. 8095. Once established, all commonly grown hydrangea species are cold hardy in this temperature range. Hydrangea paniculata 'ILVOBO' PP #22,782; CPBR #4910. To prevent problems in the winter, choosing the right type of hydrangea is essential. Always above -10 degrees F – Protect Hydrangea aspera and certain selections of Hydrangea macrophylla. These two species are exceptionally cold tolerant (down to USDA zone 3) and heat tolderant (up to USDA zone 8b, 9a in some cases), so they thrive in all but the hottest parts of North America. Hydrangea arborescens "Annabelle" is also known as a Snowball hydrangea (or smooth hydrangea). USDA Zone? grow, most reliable hydrangeas: hardy hydrangeas, like smooth or native hydrangea (H. arborescens) and panicle or peegee hydrangea (H. paniculata). Hydrangeas are woody shrubs with bright beautiful heads of flowers. While it can take cold temps, it is not very drought tolerant, especially if it's in a spot that gets afternoon sun. Bobo® Hardy Hydrangea. The panicle hydrangea can tolerate cold zones better than all the others, according to Ohio State University. It produces huge, symmetrical blooms up to 8 inches in diameter in June and July. In fall, they blush a soft pink before turning brown for winter. The most common type of hydrangea is a Bigleaf, or French hydrangea (Hydrangea macrophylla). (Hydrangea arborescens) Selling points: Cold hardy and forgiving of dry shade, this tough North American native boasts white, sometimes pink, dome-like blooms starting in early summer and lasting into fall. Limelight hydrangea trees are a stunning variety, with an enormous display of 10-inch, pale green blossoms each summer that transition to soft white, cream, and pink through fall. 'Annabelle' is an old-school standby, while 'Incrediball' is less prone to flop. These are categorized in mophead (big puffy balls), lacecap (similar to mophead but with tiny buds in the center) and mountain (similar to lacecap, but extremely cold hardy with smaller blooms). 'Snow Queen' has 4- to 12-inch-long white panicles that change to a rosy shade by fall, when they coordinate with the red-burgundy-purple color change of the leaves. This extra-hardy hydrangea thrives in Zones 3-9 in part shade. Be sure to water it during dry spells and add a two- to four-inch-deep layer of mulch on the soil around its base to help slow down water evaporation. The plant is hardy to Zone 4. There are very few rules in gardening, but perhaps the most important one is to work within your zone. This hydrangea is cold-hardy to USDA zone 3, which has an average minimum temperature of -35 degrees F. This zone extends to parts of Montana, Wisconsin, Minnesota and even parts of Alaska. While they are hardy plants they are very sensitive to loss of moisture. Be the first to review this product. Hydrangeas have been a fixture of the garden since the concept of gardening was invented, and for good reason. 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