The Main Plant entry for Hydrangeas (Hydrangea)

This database entry exists to show plant data and photos that apply generically to all Hydrangeas.

General Plant Information (Edit)
Plant Habit: Shrub
Sun Requirements: Full Sun to Partial Shade
Soil pH Preferences: Neutral (6.6 – 7.3)
Leaves: Deciduous
Fruit: Dehiscent
Flowers: Showy

The second show of colorful flower bracts and leaves gives a good

Photo gallery:
Location: My gardenDate: 2018-08-07
By Calif_Sue
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Date: 2018-12-06
By Paul2032
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Location: Phoenixville, PennsylvaniaDate: 2017-06-29Wild or Smooth Hydrangea flowers
By ILPARW
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Location: Chippewa, PA
By vbprog
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Date: 2018-12-06
By Paul2032
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Location: At a nurseryDate: 2011-11-22
By Paul2032
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Location: My YardDate: 5/24/2016
By GaNinFl
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Location: Ballynahinch, IrelandDate: September 29, 2012Hydrangea in castle garden, western Ireland
By drdawg
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Date: 2013-02-23
By Paul2032
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By Paul2032
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Location: central IllinoisDate: 2014-07-18
By jmorth
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Location: Missouri Botanical Garden (Mobot) in St LouisDate: 2016-06-18used as a wedding reception tablepiece
By jmorth
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Date: 2016-07-30
By paulaf
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Location: Botanical Gardens of the State of Georgia...Athens, GaDate: 2018-10-04Hydrangea 014
By dawiz1753
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Location: Pleasant Grove, UtahDate: 2012-04-26At Sunriver Gardens
By Paul2032
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Location: Ballynahinch, IrelandDate: September 29, 2012Hydrangea in castle garden, western Ireland
By drdawg
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Date: 2010-07-04Photo courtesy of: Yoko Nekonomania
By admin
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Date: 2015-01-30
By Paul2032
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Location: central IllinoisDate: 2015-02-16
By jmorth
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Date: 2015-02-24
By Paul2032
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Date: 2009-07-23Photo courtesy of: Louis Vest
By admin
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Location: central IllinoisDate: 2015-06-12
By jmorth
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Location: central IllinoisDate: 2015-07-06
By jmorth
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Location: St Louis, Mo.Date: 2016-06-18
By jmorth
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Date: 2013-07-28
By bwv998
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Date: 2016-10-28
By Paul2032
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Location: John Deere's home gardens Moline, Il. (Quad Cities)Date: 2008-07-05
By jmorth
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By paulaf
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By Paul2032
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Date: 2017-07-31Summer color transition from White to Chartreuse
By Fleur569
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Location: Botanical Gardens of the State of Georgia...Athens, GaDate: 2017-08-11Hydrangeas 003
By dawiz1753
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Date: 2019-01-25
By Paul2032
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Location: southern MichiganDate: late summer in 1980'sPeeGee Panicled Hydrangea in bloom
By ILPARW
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Location: Longwood Gardens in southeast PADate: 2014-10-03Pinky Winky Panicled Hydrangea
By ILPARW
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Location: At a nursery
By Calif_Sue
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Location: At a nurseryDate: 2011-11-22
By Paul2032
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Date: 2011-11-22
By Paul2032
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Location: In my garden in Kalama, Wa.Date: 2009-07-12
By Joy
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Location: Orem, UtahDate: 2012-04-26At Sunriver Gardens
By Paul2032
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Date: 2012-06-09
By Paul2032
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Date: 2012-06-09
By Paul2032
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Location: Ballynahinch, IrelandDate: September 29, 2012Hydrangea in castle garden, western Ireland
By drdawg
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Location: Ballynahinch, IrelandDate: September 29, 2012Hydrangea in castle garden, western Ireland
By drdawg
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Date: 2012-11-10
By Paul2032
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Date: 2012-12-07
By Paul2032
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Date: 2012-12-07
By Paul2032
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Date: 2013-02-23
By Paul2032
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Date: 2013-03-15
By Paul2032
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Date: 2013-06-07
By Calif_Sue
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Date: 2013-06-07a little heat stressed damage to petal edges
By Calif_Sue
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Location: my garden zone 7b NCDate: 2013-06-12
By sandnsea2
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Location: central IllinoisDate: 2014-07-02
By jmorth
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Date: 2014-07-02
By Paul2032
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Date: 2010-07-04Photo courtesy of: Yoko Nekonomania
By admin
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Date: 2010-07-04Photo courtesy of: Yoko Nekonomania
By admin
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Date: 2010-06-23Photo courtesy of: Yoko Nekonomania
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Date: 2010-06-23Photo courtesy of: Yoko Nekonomania
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By Anderwood
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By Anderwood
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Date: 2015-02-24
By Paul2032
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Date: 2009-06-18Photo courtesy of: kanegen
By admin
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Location: my garden Date: 2015-05-27
By piksihk
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Location: my garden Date: 2015-05-25
By piksihk
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Location: Wilmington, Delaware USADate: 2015-07-04
By Gerris2
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Location: Wilmington, Delaware USADate: 2015-07-04
By Gerris2
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Location: central IllinoisDate: 2011-07-06
By jmorth
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Location: Quad Cities Botanical Garden, Rock Island, Il.Date: 7-3-11
By jmorth
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Date: 2015-11-20
By Paul2032
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Date: 2015-11-20
By Paul2032
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Date: 2015-11-20
By Paul2032
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By Rose1656
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By Rose1656
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Location: Galena, Il. Date: 7-3-06Home of U.S. Grant (Civil War general then President)
By jmorth
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Location: Austria / Wiener Neustadt Date: 2016-02-16My new hydrangea looks good in my secret garden! I really love va
By Insagi
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Date: 2013-07-29
By bwv998
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Date: 2017-03-24
By Paul2032
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Location: central IllinoisDate: 2017-06-20
By jmorth
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Location: Canada
By Prosedda
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Location: central IllinoisDate: 2015-02-02
By jmorth
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Date: 2018-05-26
By pinkiris
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Location: Botanical Gardens of the State of Georgia...Athens, GaDate: 2018-06-16Hydrangea 017
By dawiz1753
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Location: West Chester, PennsylvaniaDate: 2016-06-15Oakleaf Hydrangea in white bloom
By ILPARW
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Location: West Chicago, IllinoisDate: September in the 1980'swhite flowers clusters & leaves
By ILPARW
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Location: In my garden in Kalama, Wa.Date: Mid Summer
By Joy
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Location: In my garden in Kalama, Wa.Date: Mid Summer
By Joy
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Location: In my garden in Kalama, Wa.Date: 2009-09-05
By Joy
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Location: Ballynahinch, IrelandDate: September 29, 2012Hydrangea in castle garden, western Ireland
By drdawg
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Location: central IllinoisDate: 2013-10-05
By jmorth
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Location: central IllinoisDate: 2013-10-05
By jmorth
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Location: Altamont, IllinoisDate: 8-4-07
By jmorth
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Location: central IllinoisDate: 2014-07-02
By jmorth
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Date: 2010-07-04Photo courtesy of: Yoko Nekonomania
By admin
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Date: 2010-07-04Photo courtesy of: Yoko Nekonomania
By admin
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Date: 2010-07-04Photo courtesy of: Yoko Nekonomania
By admin
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Date: 2010-06-23Photo courtesy of: Yoko Nekonomania
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Date: 2008-12-21Photo courtesy of: Breno Mendes
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Location: central IllinoisDate: 2015-04-21
By jmorth
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Location: central IllinoisDate: 2015-09-03
By jmorth
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Location: central IllinoisDate: 2011-07-06
By jmorth
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Location: central IllinoisDate: 2011-07-06
By jmorth
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Location: Quad Cities Botanical Garden, Rock Island, Il.Date: 2011-07-02
By jmorth
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Location: Quad Cities Botanical Garden, Rock Island, Il.Date: 7-3-11
By jmorth
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Location: Quad Cities Botanical Garden, Rock Island, Il.Date: 7-3-11
By jmorth
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Location: Austria / Wiener Neustadt Date: 2016-02-16My new hydrangea looks good in my secret garden! I really love va
By Insagi
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Location: Austria / Wiener Neustadt Date: 2016-02-16My new hydrangea looks good in my secret garden! I really love va
By Insagi
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Location: Missouri Botanical Garden (Mobot) in St LouisDate: 2016-06-18Bloom bundle used as a centerpiece for a wedding reception table
By jmorth
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Location: central Illinois (Springfield)Date: 2016-08-10
By jmorth
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Location: Davenport, Iowa botanical garden (VandeVeer)Date: 2008-07-04
By jmorth
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Date: 2015-07-04
By paulaf
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Comments:
Posted by Marilyn (Northern KY - Zone 6a) on May 20, 2013 7:47 PM

"Hydrangeas are popular ornamental plants, grown for their large flowerheads, with Hydrangea macrophylla being by far the most widely grown with over 600 named cultivars, many selected to have only large sterile flowers in the flowerheads. Some are best pruned on an annual basis when the new leaf buds begin to appear. If not pruned regularly, the bush will become very 'leggy', growing upwards until the weight of the stems is greater than their strength, at which point the stems will sag down to the ground and possibly break. Other species only flower on 'old wood'. Thus new wood resulting from pruning will not produce flowers until the following season.

Hydrangeas are moderately toxic if eaten, with all parts of the plant containing cyanogenic glycosides. Hydrangea paniculata is reportedly sometimes smoked as an intoxicant, despite the danger of illness and/or death due to the cyanide."

Taken from wikipedia's page at: http://en.wikipedia.org/wiki/H...

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Posted by ILPARW (southeast Pennsylvania - Zone 6b) on Dec 14, 2018 3:14 PM

According to a few different botanical sources, there are about 23 to 70 to 100 species of Hydrangeas native to the Americas, only a few, and most native to southern & eastern Asia. Some botanists used to consider them as part of the Saxifrage Family that includes Alumroot & Coralbells as members, but seems to not be best. There is a Hydrangea Family in the Dogwood Order that contains about 17 genera with about 190 species that includes Deutzia, Philadelphus (Mockoranges), Decumaria (Climbing-Hydrangea), Schizophragma (Hydrangea-vines), and others. Hydrangeas usually are soft-wooded shrubs, but a few are small trees or lianas (woody vines), and most are deciduous, but some are evergreen in tropical sites. The word "hydrangea" was made up by botanists from two Greek words meaning "water vessel" that refers to the shape of the cup-shaped seed capsules. The flower clusters are panicles or corymbs composed of tiny fertile flowers that bear the brown, dry fruit and the sterile flowers with 4 petal-like sepals that are conspicuous. Some of the several species that are used in gardening-landscaping have mutated cultivars where there are only sterile flowers in the clusters that make up a showier display. Such all-sterile flower heads do not benefit pollinating insects. Most species bear only white flowers, but a few bear flowers that colour as blue to purple to pink to rose. The most well-known species is the Bigleaf Hydrangea (H. macrophylla) from Japan that has had so many hundreds of different cultivars developed with all colours available and is used a lot as a florist flower in a pot grown in greenhouses, besides gardens. (The Mountain Hydrangea of Japan & Korea (H. serrata) seems to be a subspecies of this that has smaller leaves.) Many people call this Japanese species as "the Hydrangea" in the South and Mid-Atlantic Regions of the USA, but farther north where it is not cold hardy, "the Hydrangea" is a cultivar of the white-blooming Wild Smooth Hydrangea of eastern North America (H. arborescens). There are three other species of hydrangeas sold by nurseries as the Oakleaf Hydrangea, and the Panicled Hydrangea (H. paniculata) and the Climbing Hydrangea (H. petiolaris) from east Asia. The buds and leaves of Hydrangeas are opposite. There is a Peruvian Hydrangea native from Costa Rica into the Andes that can be a shrub or a vine.

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Plant Events from our members
piksihk On August 12, 2018 Cuttings stuck
Pink from back
piksihk On June 17, 2017 Plant Ended (Removed, Died, Discarded, etc)
Plant Delight pot
piksihk On April 22, 2017 Transplanted
From back WG to frt bed; this is the 2nd one
piksihk On October 8, 2016 Miscellaneous Event
Two rooting - pink
UncleWill On October 23, 2018 Miscellaneous Event
No blooms this year. Early warm spell exposed buds to killing frost.
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Discussion Threads about this plant
Thread Title Last Reply Replies
Oh my! by wcgypsy May 21, 2016 11:49 AM 8
Hydrangeas by valleylynn Dec 16, 2017 10:09 AM 4
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Ground cover under large oak trees by D2TX Apr 24, 2019 6:52 AM 12
Ordering from Jackson and Perkins this year, would you? by ac91z6 Apr 13, 2019 2:14 PM 4
What is this and what should I replace with? by Palmeramateur Apr 19, 2019 10:32 AM 10
Potted Hydrangea by MaureenQC Apr 13, 2019 4:27 AM 2
Tree ID help please by dawiz1753 Apr 10, 2019 4:13 PM 5
How to clean up and maintain a garden by Goose1 Apr 15, 2019 8:02 AM 13
Oakleaf Hydrangea Pee Wee by jhg50185155 Apr 10, 2019 5:33 AM 1

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