Lacecap Hydrangea (Hydrangea macrophylla Endless Summer® Twist-n-Shout®) in the Hydrangeas Database

General Plant Information (Edit)
Plant Habit:	Shrub
Life cycle:	Perennial
Sun Requirements:	Full Sun to Partial Shade Partial or Dappled Shade
Water Preferences:	Mesic
Soil pH Preferences:	Neutral (6.6 – 7.3)
Plant Height:	3 - 5 feet
Plant Spread:	3 - 4 feet
Leaves:	Good fall color Deciduous
Fruit:	Dehiscent
Flowers:	Showy Blooms on old wood Blooms on new wood Other: Rebloomer
Flower Color:	Multi-Color: Pink to Blue to Violet Other: Color depends on soil PH.
Flower Time:	Late spring or early summer Summer Late summer or early fall
Wildlife Attractant:	Bees
Propagation: Other methods:	Cuttings: Stem Cuttings: Cane Division
Pollinators:	Bees
Miscellaneous:	Patent/Plant Breeders' Rights: PP20,176
Parentage:	Penny Mac x Lady in Red
Child plants:	one child plant

Alternative cultivar names:

'Piihm-1'
'Piihm-I'

Trade name information:

Series: Endless Summer®
Trade Name: Twist-n-Shout®
Cultivar name: 'Piihm-1'

Common names

Lacecap Hydrangea
Hydrangea
Bigleaf Hydrangea

Photo Gallery

Location: Thomasville, GA USA
Date: 2019-05-18

Uploaded by Tom_F_GA

Location: My backyard in Salisbury, MD
Date: 2017-06-18
Endless Summer Twist-n-Shout Lacecap Hydrangea

Uploaded by Archivesgirl

Location: Apple Valley MN
Date: 2017-12-18

Uploaded by crawgarden

Location: Feeringbury Manor, Essex, UK
Date: 2022-07-29

Uploaded by RachaelHunter

Uploaded by springcolor

Uploaded by Lynnez

Uploaded by Paul2032

Uploaded by Joy

Location: Western Washington
Date: 2014-10-08
fall rebloom

Uploaded by springcolor

Location: My Northeastern Indiana Gardens - Zone 5
Date: 2010-06-26
Blooms on Old and New Wood

Uploaded by chelle

Location: Apple Valley MN
Date: 2016-08-10
Twist-n-Shout

Uploaded by crawgarden

Uploaded by Paul2032

Location: Apple Valley MN
Date: 2019-10-28
Twist n Shout glows in the fall

Uploaded by crawgarden

Uploaded by Joy

Uploaded by Paul2032

Uploaded by Joy

Location: My garden in Aurora, Ontario zone 5b
Date: 2015-08-09

Uploaded by acer5050

Uploaded by crawgarden

Location: Fairfax, VA
Date: 2022-04-01
Public landscaping

Uploaded by sedumzz

Location: Botanical Gardens of the State of Georgia...Athens, Ga
Date: 2019-06-09
Lacecap Hydrangea 020

Uploaded by dawiz1753

Uploaded by Paul2032

Uploaded by Catmint20906

Location: Wood County. TX
Date: 2022-06-01

Uploaded by SunriseSide

Location: Botanical Gardens of the State of Georgia...Athens, Ga
Date: 2019-05-24
Hydrangea macrophylla - Twist And Shout 001

Uploaded by dawiz1753

Uploaded by Paul2032

Location: Eagle Bay, New York
Date: 2017-07-15
Lacecap Hydrangea (Hydrangea macrophylla Endless Summer® Twist-n

Uploaded by adknative

Uploaded by Paul2032

Location: Botanical Gardens of the State of Georgia...Athens, Ga
Date: 2019-06-02
Lacecap Hydrangea - Twist-N-Shout 002

Uploaded by dawiz1753

Uploaded by clintbrown

Uploaded by Joy

Uploaded by Paul2032

Location: Bordines Nursery, Rochester Hills, MI
Date: 2009-09-03

Uploaded by DaylilySLP

Uploaded by DaylilySLP

Uploaded by Joy

Uploaded by Paul2032

Location: Apple Valley MN
Date: 2016-10-21

Uploaded by crawgarden

Uploaded by Joy

Uploaded by Paul2032

Uploaded by Paul2032

Uploaded by Paul2032

Uploaded by clintbrown

Location: Western Washington
Date: 2014-10-08

Uploaded by springcolor

Uploaded by Paul2032

Location: al cook nursery
Date: 2015-05-22

Uploaded by piksihk

Uploaded by Paul2032

Uploaded by Paul2032

Uploaded by Paul2032

Uploaded by Joy

Uploaded by Paul2032

Location: Bloomington, Illinois
Date: 2012-06-16

Uploaded by BookerC1

Location: My Northeastern Indiana Gardens - Zone 5b
Date: 2010-07-07

Uploaded by chelle

Uploaded by Paul2032

Uploaded by Catmint20906

Uploaded by Joy

This plant is tagged in:

Comments:

Posted by frankrichards16 (Clinton, Michigan - Zone 5b) on Mar 4, 2018 8:36 AM concerning plant:

Developed by Michael A. Dirr (University of Georgia Research Foundation, Inc). A cross-pollination of Hydrangea macrophylla 'Penny Mac' and Hydrangea macrophylla 'Lady in Red' (PP15175, 2004) producing the first re-blooming lacecap hydrangea. Marketed as Endless Summer® Twist-n-Shout® it has pink or periwinkle blue flowers and blooms on sturdy red stems. Note that the remontant trait comes from 'Penny Mac' while the lacecap flowers and red stems are from the female parent 'Lady in Red.'

After Professor Dirr retired in 2003, he co-founded Plant Introductions, Inc. (or PII). Thus the registered name 'PIIHM-I' (PP20176, 2009) can be deciphered where HM stands for Hydrangea macrophylla and the -I represents the first one. A name that is often mistakenly printed as 'P11HM-1' or 'PIIHM-1' where one or more of the "I"s are replaced by the number 1.

Reply to this comment
Posted by eclayne (Pioneer Valley south, MA, USA - Zone 6a) on Dec 27, 2016 7:07 PM concerning plant:

The proper spelling of this cultivar's name is questionable, possibly due to the use of san serif script.

US PP20,176: Piihm-1 (but spelled Piihm-I in the body of the patent).
Ca PBR3,688: Piihm-I
AU PBR: Piihm-1

Reply to this comment

Plant Events from our members
chelle	On September 16, 2014	Transplanted Moved to W window hugel area, far NW corner.
aspenhill	On July 20, 2014	Obtained plant Betty's Azalea Ranch - qty 1
Catmint20906	On June 2, 2015	Bloomed
MissMew	On May 18, 2018	Miscellaneous Event Plant had rough winter but is now coming up from the ground
MissMew	On June 2, 2016	Miscellaneous Event Suzanne replaced plant
MissMew	On September 1, 2014	Obtained plant
christine2	On May 25, 2020	Obtained plant OV1

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Hydrangeas Lacecap Hydrangea (Hydrangea macrophylla Endless Summer® Twist-n-Shout®)

Hydrangeas

Lacecap Hydrangea (Hydrangea macrophylla Endless Summer® Twist-n-Shout®)