The first response is true. The PH in the soil is what determines the color of the bloom. Try this website cause they list all the different species of Hydrangea and how to care for your plant. They'll explain how to change the PH, how to prune it in the spring for beautiful blooms in the summer. I use this website all the time for caring for my plants. Good luck!
http://www.colorchoiceplants.com/hydrangea_care.htm
You most likely have the third plant on the list. It's the most popular.
2007-08-15 08:04:38
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answer #1
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answered by Gab&Thomas 5
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To ensure your hydrangea flowers BLUE, and not PINK... you need aluminum in the soil.
If there is no aluminum present then the flowers are pink... if aluminum is present then hydrangeas bloom blue. The best way to check your soil to get a simple PH test kit from your garden center and then, if necessary, compensate the soil with the right fertilizer.
You can buy straight aluminum sulphate in any gardening store, or Miracle-Gro's "Miracid" is an acid fertilizer.
Mix either up per the package directions and water your hydrangea once a week --a gallon or more depending on the size of your plant-- starting in the spring. If you're starting now, use a half-strength solution for the first two waterings so you don't shock the hydrangea.
Hope this helps,
   TX Griff
2007-08-15 15:21:12
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answer #2
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answered by TX-Griff 4
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Presumably you bought it in a pot and then planted it in your garden - if so then you have to add some peat to its surrounding roots, or alternatively re-pot it in ericacious soil (acid soil). Alkaline soil will make hydrangers go pink and Acid soil will make them go blue/purple. Don't make the mistake I made and mix the two soils because they end up being a horrible brown colour!
2007-08-15 15:04:18
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answer #3
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answered by georgeygirl 5
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If you go to a good garden centre, they sell stuff to put in the soil. It's all to do with the PH. All our Hydrangeas went pink too, but we've managed to keep one blue! Just ask in a good garden store and they should help you out.
2007-08-15 15:00:05
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answer #4
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answered by Cpt. Willard 4
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Aluminum sulfate, it comes in granules and you put it around the base of the plant. Depending on how blue you want the flower, the more you would use. Directions should be on the bag.
2007-08-15 15:42:34
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answer #5
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answered by Lollie 123 3
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Blue is acid. You need to create an acid soil environment. Speak to your local garden shop expert about what to add.
Beyond DAve
2007-08-15 14:59:27
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answer #6
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answered by 9thwonder 2
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The colour depends on the acidity/alkinity of the soil.
2007-08-15 15:00:19
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answer #7
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answered by Sparkles 2
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If you live in an alkaline soil area (limestone, chalky), you cannot have a blue hydrangea unless you grow it in a (big) pot using ericaceous (acid) soil.
2007-08-15 15:02:55
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answer #8
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answered by nipper 3
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read here....
http://www.hydrangeashydrangeas.com/colorchange.html
there must be aluminum in the soil AND the soil must be acidic enuff for the plant to be able to TAKE UP the aluminum......
2007-08-15 16:02:43
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answer #9
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answered by meanolmaw 7
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You need to put nitrogen into the soil. They sell it at any Home Depot or Lowe's. You mix it up with water similar to a fertilizer.
2007-08-15 14:58:39
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answer #10
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answered by montana_is_the_gr8_1 2
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