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Hydrangeas…How and Where and What… Part I

By Paul Rodman (paulgrowMay 25, 2013
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The word hydrangea come from the Greek “hydra” meaning water and “angeoa” meaning vessel which refers to this plant's thirst for water and the shape of its seed pod. In this series of articles I’ll discuss the plant's characteristics, fertilization, site location, planting, pruning, winter protection in the colder climes. I’ll also cover the different types and how to adjust your soil pH to suit this group of plants.

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(Editor's Note:  This article was originally published on January 10, 2008. Your comments are welcome, but please be aware that authors of previously published articles may not be able to respond to your questions.)

I’ve been growing hydrangeas for several years; it’s been a constant learning experience, I have several species and cultivars and each is unique in their own special way.

Site Selection

The ideal location will have morning sun and afternoon shade. In USDA zone 6 and lower you can get away with a little more sun than in warmer regions.

Hydrangeas will not thrive in heavy shade. If grass won’t grow in a particular area because of shade hydrangeas won’t either.

If you have a spot in mind that has full sun you can use a Pee Gee (Hydrangea paniculata 'Grandiflora') hydrangea. It will tolerate full sun as long as it gets plenty of water.


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Pee Gee 'Grandflora"

Oak leaf hydrangeas (Hydrangea quercifolla) will also grow in full sun, but the blooms will fade a lot quicker than if it has some afternoon shade.

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Oak Leaf Hydrangea

Soil Requirements

After you have decided on a site the first step is to take a soil sample from that location and get it tested.

Hydrangeas are acid-loving plants and do best with a pH in the 5.0-5.5 range. This pH range will give you blue flowers; if you desire pink flowers you will need to increase the pH up to the 6.0-6.5 range. The soil test will give you a benchmark and you can adjust from there.

Planting

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When the soil amending is complete, dig a planting hole twice as large as the pot your plant is in. Sprinkle a handful of bone meal or super phosphate into the hole. This will encourage root growth.

Mix up a batch of compost or other organic material in a wheel barrow with the soil you removed from the planting hole to a 1:1 ratio. Plant the hydrangea and backfill with your mix and water in well. Mulch to a depth of 2 to 3 inches with organic mulch. This will conserve moisture and deter weeds.

Now comes the most important part of growing hydrangeas successfully. WATER-WATER-WATER. You should water daily for the first 3 to 4 weeks after planting. After that do not allow the soil to dry out, water as needed. Be especially watchful during hot periods.

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Fertilization

In the warmer areas (USDA zone 7 and higher) this plant does best when fertilized twice a year. Apply a balanced fertilizer in May and July. In cooler areas (USDA zone 6 and lower) apply fertilizer in June. I like to use Wondergro this is a 13-13-13 with sulfur. I use this product on all my acid loving plants.

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A good top dressing of compost 2 or 3 times a season will also help your plant stay healthy.

Stay tuned for the next installment on hydrangeas: I’ll discuss the different types and pruning.


  About Paul Rodman  
Paul RodmanPaul Rodman has been gardening for over 45 years. He is an Advanced Master Gardener, and American Rose Society Consulting Rosarian. He is President Emertius of the Western Wayne County Master Gardener Association in Wayne County, Michigan. He currently serves as the greenhouse chairman of this group. Rodman has amassed over 5500 volunteer hours in the Master Gardener program. Rodman is the garden columnist for The News Herald newspaper, in Southgate, Michigan. He has also written for the Organic Gardening.com web site. He is a certified Master Canner and has taught classes on Home Food Preserving for 7 years. He has lectured on various gardening topics throughout southeastern Michigan. His favorite pastime is teaching children about gardening. For the past several years he has conducted classes for second grade students teaching them about subjects ranging from vermi-composting to propagation.

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Discussion about this article:
SubjectTopic StarterRepliesViewsLast Post
Hydrangea Ayshe lilyste 0 1 Oct 11, 2014 5:52 PM
Transplanting hydrangeas. gramstwo 0 15 May 27, 2013 9:01 AM
Phantom Hydrangea candjg 1 19 Jul 1, 2012 1:59 PM
Black spots and overwatering edforlife 1 24 May 30, 2011 11:45 AM
Oakleaf Hydrangea Debsroots 1 44 Mar 23, 2010 7:53 AM
Hydrangea didn't bloom! :( deannep1 0 57 Jul 10, 2009 5:24 PM
propogation of climbing hydrangea Barberrylane 0 22 Jun 23, 2009 2:09 AM
Blue easter hydrangea Milanart 1 46 Jun 10, 2008 10:09 PM
Camelias and Hydrangeas location Newlywed 0 38 Mar 24, 2008 6:17 PM
hydrangeas fear 2 83 Jan 22, 2008 3:21 PM
This site is very important for me!!!! haydee_1 0 35 Jan 18, 2008 4:12 AM
Is this a Hydrangea tree? jeffrushka 3 121 Jan 17, 2008 11:32 AM
hydrangeas ellieshay 0 51 Jan 15, 2008 2:18 PM
Awaiting next installment LouC 2 56 Jan 15, 2008 11:00 AM
Is there help for my hydrangeas? kru 1 99 Jan 15, 2008 2:51 AM
thanks again grampapa 2 40 Jan 14, 2008 6:06 PM
hydrangea seeds wind 6 88 Jan 11, 2008 5:15 AM
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