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Need green thumb advice!
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<blockquote data-quote="Marguerite" data-source="post: 184142" data-attributes="member: 1991"><p>The colour of the hydrangea flowers changes with pH. And they do die back in winter, they can look straggly and dead.</p><p></p><p>I can't help you with info on the cold, I don't know enough. But I remember someone I worked with whose sister ran a B&B in the Blue Mountains where is sometimes snows in winter and always has frosts - she had magnificent hydrangeas, so they should be able to cope. You should protect it by using mulch, especially if you have any young growth as the weather turns cold.</p><p></p><p>With the pH - it's sort of the opposite of litmus paper. In science class litmus paper goes red with acid, blue with alkali. With hydrangeas it's the other way around.</p><p></p><p>My mother had a row of hydrangea bushes and would bury her steel wool pads from the kitchen under alternate bushes, so they alternated pink, blue, pink, blue. The steel wool would have made them pinker.</p><p></p><p>Some hydrangeas have very intense colour, some are paler. Changing the pH won't change the intensity of the colour, only whether it's pink or blue.</p><p></p><p>You can also grow hydrangeas from cuttings - when you cut them back you can get pencil lengths of stem and poke them into soil. Make sure you put them in right way up, and make sure you have nodes (the mark on the stem where shoots will come from) on every cutting.</p><p></p><p>Marg</p></blockquote><p></p>
[QUOTE="Marguerite, post: 184142, member: 1991"] The colour of the hydrangea flowers changes with pH. And they do die back in winter, they can look straggly and dead. I can't help you with info on the cold, I don't know enough. But I remember someone I worked with whose sister ran a B&B in the Blue Mountains where is sometimes snows in winter and always has frosts - she had magnificent hydrangeas, so they should be able to cope. You should protect it by using mulch, especially if you have any young growth as the weather turns cold. With the pH - it's sort of the opposite of litmus paper. In science class litmus paper goes red with acid, blue with alkali. With hydrangeas it's the other way around. My mother had a row of hydrangea bushes and would bury her steel wool pads from the kitchen under alternate bushes, so they alternated pink, blue, pink, blue. The steel wool would have made them pinker. Some hydrangeas have very intense colour, some are paler. Changing the pH won't change the intensity of the colour, only whether it's pink or blue. You can also grow hydrangeas from cuttings - when you cut them back you can get pencil lengths of stem and poke them into soil. Make sure you put them in right way up, and make sure you have nodes (the mark on the stem where shoots will come from) on every cutting. Marg [/QUOTE]
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