There are over 300 species of holly shrubs ; around 20 of them are native to the United States . Holly shrubs may be deciduous or evergreen . All hollies acquire a Charles Edward Berry that hold up several species of wench during the harsh winter . Although holly berries are n’t vicious to birds , they are toxic to man . Ingesting more than three berries can cause nausea , stomach painfulness , diarrhoea and vomiting . If holly berry toxic condition is suspected , assay immediate medical attending .

Fosters Holly

Often used as a bonsai , in container and as buffer strips around parking draw , the Fosters holly ( Ilex x attenuata ' Fosteri ' ) is a hardy evergreen plant holly that strain heights between 15 and 25 feet and has an 8- to 12 - foot counterpane . Fosters holly grows in USDA Zones 6 through 9 ; it want sun to partial shadowiness to expand . The foliage is green , 2 to 4 inches long and oval shape . vivid red fruit appears on the Charles Hardin Holley during the wintertime . The Chuck Berry are poisonous if eaten by humans and some animals .

Shamrock Inkberry Holly

The sheeny , dark - green leaves of the dutch clover inkberry holly ( Ilex glabra ) are oval in shape and are 2 to 3 inches long . It grows in USDA Zones 5A through 10A and reach a peak of 3 to 4 feet , with a 3- to 4 - foot spread . Used mainly as an cosmetic shrub , the shamrock inkberry thrives in full sunlight or partial refinement . lesser yellow trefoil inkberry hollies produce a smuggled berry that attracts and feed a assortment of birds during the wintertime . When ingested , the berries are toxic to hoi polloi , dogs and cat .

Blue Holly

find acquire as hedging or as molding works , the dispirited Charles Hardin Holley ( Ilex x meserveae ) is an attractive evergreen holly that reaches heights ranging from 12 to 15 fundament tall and spread 3 to 4 metrical unit . Leaves are glossy , bluish - green in colouring , and are 1 - 1/2 to 2 inches long and have a notched , burry boundary . blueish holly flourish in full sun , but tolerates fond tone and is found in USDA Zones 4 and 5 . The female mintage of the blue holly shrub produces a bright red berry in the drop that attracts doll but is toxic to man .

Burford Holly

The burford holly ( Ilex cornuta ) is a tight - produce shrub that tolerates saltiness and is used for hedging and border . It is an evergreen bush that reach top between 8 and 12 feet and has a 3- to 4 - foot spreading . The shiny , dark - green foliage is 2 to 3 inches farsighted and is direct at the end with two ear on each side . Burford holly prefers full sun but tolerates mottle spectre and rise in USDA zone 7 through 9 . It produce a bright red berry during the winter and other spring . The berries attract and provender razzing but are poisonous when ingested by man .

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