Monday, January 18, 2010

Gardenias

A genus of shrubs and trees that are part of the larger Rubiaceae family.



Gardenias need very acid soils PH 4.5 to 5

Gardenia capensis
A slow growing tree, reaching a maximum size of 50 x 20 ( rarely over 40 ) feet, that is native to South Africa.
The leaves are up to 4 x 1.5 inches in size.
Hardy north to zone 9

Gardenia carinata
A tree native to Malaysia reaching up to 30 feet in 15 years and eventually to 50 x 35 feet at most.
The leaves are large up to 18 x 8 inches in size.
The flowers are up to 4 inches across.
Hardy north to zone 10; it is not drought or salt tolerant

Gardenia imperialis
Native to west Africa and reaching up to 66 feet.
The leaves are huge up to 20 x 10 inches
The flowers are up to 8 inches wide.
Hardy north to zone 10

Gardenia jasminoides
A beautiful evergreen shurb or rarely a small tree reaching as much as 40 x 12 feet. Moderate growth rate up to 2 feet per year. It is native from Pakistan to central & eastern China, Korea & Japan; south to India & Malaysia.
The leathery, elliptical leaves, up to 10 x 3 ( rarely over 6 ) inches in size, are glossy deep green.
The fragrant, white flowers, up to 5 inches wide, are borne during summer.
They are followed by an orangish-yellow berry.
Hardy zones 8 to 11 in full sun to partial shade on light, fertile, acidic, well drained soil that is mulched. Common in Florida and the southeast, preferring hot humid summers and known to tolerate as high as 125 F. It is not salt tolerant and can be prone to white fly, scale & mealybug.
Propagation is from softwood cuttings taken during spring, as well as semi-ripe cuttings taken during summer.

* photo taken on July 25 in Ellicott City, MD


'August Beauty'
A fast growing, medium-sized, rounded shrub; reaching up to 3.3 x 3.3 feet in 3 years, 6 x 6 feet in 10 years, eventually slightly broader.
The leathery foliage is glossy deep green.
The fragrant, large, creamy-white, double flowers, up to 3 inches wide, appear over a long season from late spring thru late summer.
They are followed by fruits that ripen to orange during autumn and persist into winter.
Hardy zones 8 to 11.

* photo taken on April 17 2010 in Columbia, MD


'Chuck Hayes'
Probably the most cold hardy of all Gardenias reaching up to 5 feet in 12 years, eventually to 6 x 7 feet. Moderate growing.
The leaves up to 7 x 3 inches in size, are glossy deep green.
The very fragrant, white, semi-double flowers are borne early summer to early autumn.
Hardy north to zone 6b. Stems regrow if killed to ground ( which occurs at around 0 F ). Deer resistant.

* photos taken on June 23 2013 @ U.S. National Arboretum, DC

* photos taken on Sep 23 2013 in Burtonsville, MD

* photo taken on Dec 13 2013 in Ellicott City, MD

* photo taken @ U.S. Botanical Garden, Wash., DC on Aug 25 2014


'Crown Jewels'
A low growing shrub, reaching up to 2 x 5 feet in 10 years. Some records include: 5 years - 2 x 2 feet; largest on record - 5 feet.
The leathery, glossy mid-green leaves are smaller than that of the species.
The abundant, double, pure white flowers are fragrant.
Hardy zones 7 to 10.

* photo taken on Sep 25 2013 in Damascus, MD


'Daisy'
A dense, mounding shrub, reaching up to 3 x 3 feet in 10 years with an eventual maximum size of 4 x 5 feet.
The foliage is glossy deep green.
The very fragrant, pure white, single flowers, up to 3 inches wide, are borne during late spring then sporadically through the summer.
Hardy zones 7a to 10.

* photos taken on July 1 2013 in Columbia, MD


'Florida'
Reaches a maximum size of 6.5 x 6.5 feet, with pure white flowers.

'Fortuniana'
Slow growing and rounded in habit, reaching a maximum size of 8 x 7 feet.
The leathery, oval leaves, up to 4 inches in length, are glossy deep green.
The large, fragrant, double flowers are white.

'Frostproof'
Rapid growing, reaching up to 4 x 6 feet in 10 years, with an eventual maximum size of 6 x 6 feet. It makes a great low hedge.
The foliage is bright green at first, turning to glossy deep green. The foliage resembles that of 'Radicans'.
The sweetly-fragrant, white, double flowers, up to 2 inches wide, appear during late spring.
Hardy zones 7b to 10 ( reports of 6 on very protected sites however with winter dieback ).

* photos taken on Oct 6 2012 in Howard Co., MD

* photo taken on Apr 16 2013 in Burtonsville, MD
* photo taken on May 4 2013 in Columbia, MD

* photo taken on July 15 2013 in Harford Co., MD


'Golden Magic'
A medium-sized shrub, reaching up to 6 x 6 feet.
The leathery foliage is glossy deep green.
The fragrant, double flowers, up to 3+ inches across, are pure white, later deepening to creamy-white then finally golden-yellow. They are borne all summer long.
Hardy zones 8 to 10.

'Grif's Select'
Reaches up to 4 x 5 feet and is similar to 'Kleims Hardy'.
The foliage is glossy deep green.
The white, single flowers, up to 2 inches wide, appear late spring to mid-summer.
Reported hardy north to zone 5 on protected sites however likely with winter dieback below 0 F.

'Grandiflora'
Larger leaves and pure white flowers.

'Heaven Scent'
Moderate growing, dense and upright in habit, reaching up to 4 x 4 feet in 10 years, with an eventual maximum size of 6 feet. It makes a great plant for patio containers.
The foliage is glossy deep green.
The abundant, very fragrant, single, white flowers are borne during late spring, repeating during summer and fall.
They are followed by showy orange and red seedheads during autumn.
Hardy zones 6b to 9.

* photos taken on Sep 16 2013 in Columbia, MD

* photo taken on Sep 23 2013 in Burtonsville, MD


'Kleims Hardy'
Moderate growing, reaching a maximum size of 5 x 7.5 ( rarely over 4 ) feet.
The leathery foliage is glossy very deep green.
The very fragrant, white, single flowers, up to 2 inches wide, appear early summer into early autumn.
They are sometimes followed by orange berries, up to 1 inch.
Hardy zones 7b to 10 in full sun to partial shade. Among the hardiest if Gardenias, it tolerates -3 F with only minor leaf burn if planted on a site protected from wind and full sun during the winter. It is worth a try even in sheltered areas of zone 6 and is even known to have survived -14 F with winter dieback however with regrowth and bloom the following summer. Deer resistant.

* photo taken Feb. 2009 @ U.S. National Arboretum, DC

* photo taken on October 17 2010 @ U.S. National Arboretum, D.C.

* photo taken on Oct 6 2012 in Howard Co., MD

* photos taken on June 23 2013 @ U.S. National Arboretum, DC


'Magnifica'
Semi-double, creamy-white flowers.

'Mystery'
Vigorous, dense and compact, reaching up to 6 x 6 feet in 10 years, reaching an eventual maximum size of 8 x 10 ( usually much smaller ) feet.
The leathery foliage is glossy deep green.
The abundant, fragrant, large, creamy-white, semi-double to double flowers, up to 5 inches across, appear late spring into late summer.
Hardy zones 8 to 10.

'Pinwheel'
Reaches up to 4 x 4 feet, with luxuriant mid-green foliage and fragrant, white, pinwheel shaped flowers up to 2.5 inches across. It blooms profusely during late summer, repeating later in summer into early fall. It is a fantasic plant for large patio planters. Hardy zones 6 to 9.

'Radicans'
Rapid growing, reaching up to 3 x 4 feet in 10 years, with an eventual maximum size of 3 x 6 feet, with spreading stems that root as they touch the ground. It can be used for groundcover and foundation plantings.
The leathery, glossy deep green leaves are smaller than that of the species.
The abundant, fragrant, white, semi-double flowers, up to 2 inches wide, appear late spring into late summer.
Hardy zones 8 to 10 ( 7b on protected sites ).

'Shooting Star'
Reaches a maximum size of 8 feet, with large leaves and large, fragrant, white, single flowers during late spring to early summer.
Hardy north to zone 7, possibly even 6 as a dieback shrub on protected sites.

'Summer Snow'
A fast growing shrub, reaching up to 5 x 5 feet.
The large, broad foliage is glossy deep green.
The very fragrant, large, pure white, double flowers are borne during late spring into early summer.
Hardy zones 7 to 9 ( 6 on protected sites ).

* photo taken on Apr 20 2017 in Columbia, MD

* photo taken on June 9 2017 in Columbia, MD


'Variegata'
Moderately fast growing and rounded in habit, reaching up to 5 feet in 8 years, with an eventual maximum size of 6 x 6 feet.
The gray-green foliage is boldly-margined creamy-yellow.
Hardy north to zone 7b

* photo taken on June 23 2013 @ U.S. National Arboretum


'Veitchii'
Upright in habit, reaching a maximum size of 10 x 7 feet.
The foliage is glossy deep green.
The very fragrant flowers, up to 1.5 inches across, are double and white.

* photo of unknown internet source


Gardenia latifolia
A large tree native to India & southeast Asia that can reach up to 40 feet with a trunk up to 1.3 feet in diameter.
The huge leaves reach up to 12 x 12 inches in size.
The flowers are up to 4 inches wide.
Hardy zones 10 to 12.

Gardenia palustris
to 35 feet in height with leaves up to 8 x 4 inches

Gardenia taitensis ( Tahitian Gardenia )
A very attractive tree reaching up to 30 feet in height. Slow growing, it can grow up to 1 foot per year.
The large, ovate leaves, up to 10 inches in length, are glossy deep green.
The flowers are creamy-white.
Hardy zones 10 to 12 in sun or shade. It is flood tolerant.

Gardenia tubifera
A tree, reaching a maximum height of 100 feet, that is native to southeast Asia.
The leaves are up to 10 x 4 inches in size.
The flowers are up to 3.5 inches across.
Hardy north to zone 10b

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