When pruning hydrangeas, knowing which type of hydrangea you have is key to knowing what time of year to prune it. Pruning last year’s growth effectively removes the next season’s flower buds. Those rebloomers — unlike the hydrangeas of old — have the ability to grow new wood in the current season which don’t need a cold set period for those flowers. By: Garden Guides Team 21 September, 2017. As always, the choice is yours. \"Incrediball\" was presumably chosen as the name to trumpet the impressive siz… While these old-fashioned hydrangeas bear gorgeous balls of pink or blue flowers, they’re notorious for their unreliably here in the northern U.S. FREE SHIPPING. Hydrangeas are easy to grow but they do need moist soil. Make sure your container will withstand the rigors of winter. Their flowers have been forming on the plants since August and those are the buds that you need to protect. If they are too cumbersome to move, they can remain outside and be protected by covering the entire pot and plant. Hydrangeas for Zone 3 Gardens. I believe hydrangeas are magnificent plants and are worth whatever we need to do to get the benefit of their presence in the garden. None of my plants flowered this year. Exactly what you do depends on what kind of hydrangea you have and where it lives. "Summer Crush gets two to three feet tall and wide, where The Original can be six feet tall and wide," says Ryan Mcenaney, public relations and communications specialist for Bailey Nurseries. Oak leaves work well because they do not settle as easily as other materials. Generally speaking, all hydrangeas should be fine within that range and all will survive 32 degrees F. The ones in zone 8 might burp every now and then, but for the other zones, heat is the enemy. Even those of us who live in cooler climates can enjoy plenty of varieties of beautiful hydrangeas. Oak leaves work well because they do not settle as easily as other materials. The USDA map says LA is zones 8a-10a. We have 2 hydrangea plants in 2 pots. on Sep 9, 2014. You can protect your plant by erecting some kind of temporary windbreak. Properly caring for your potted hydrangea over winter will determine how successful the blooms are in the following summer, and how many you get. However, be aware that moisture build-up is a potential pitfall with any plastic and heavy snow can crush the closed bag – and your plant. I'm in Long Island, NY--very cold winters. For example, if you garden in Zone 7, choose perennials, trees, and shrubs marked hardy to Zone 5 to increase the chance that the plants will survive the winter. So you can still get flowers, albeit later in the season with those plants. Snow can be a protective blanket in some cases or it can break and distort the stems when it is heavy and wet. Hydrangeas bloom in a series of vibrant colors: pink, lavender, rose, white, and clear blue with an occasional bloom. That means that if the plant loses its first pass at flower buds to weather or deer, you have a second chance for flowers in the current season from mid-summer on. Do we still have to cover them? 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