Citrus (Citrus)


Botanical Information

FamilyRutaceae
GenusCitrus
CategoryTropicals, Woody
TypeTree (evergreen), Shrub (evergreen)

Details

USDA Hardiness Zone9 - 11
USDA Hardiness Ref.
Canadian Hardiness ZoneRequires cold season protection under glass.
Canada Hardiness Ref.
RHS Hardiness ZoneH1c - H4
RHS Hardiness Ref.
Temperature (°C)-10 - 10
Temperature (°F)14 - 50

Description and Growing Information

General DescriptionGenus of plants that include lemon, lime, sweet orange, sour orange, tangerine, grapefruit, citron, and shaddock.
PestsXylella a bacterial disease is a serious threat to many horticultures crops due to its virulence and wide range of species it can infect. It can infect more than 560 species with wide ranging symptoms including leaf scorch, yellowing and scorching, wilt, branch and twig dieback and plant death. These symptoms can be identical to other symptoms such as drought and weather stress. Infected plants show symptoms within a few years after planting.
Notable SpecimensCentennial Conservatory, Thunder Bay, Ontario, Canada.
Bark/Stem DescriptionMany species have thorns.
Leaf DescriptionLeaves are oval-shaped.
Flower DescriptionFragrant flowers usually have 4-5 petals.
Fruit DescriptionFruit is a modified berry called hesperidium, with flesh divided into segments. The skin of the fruits are studded with oil glands.
Colour DescriptionFlowers are usually white. Leaves are medium to dark green.
Texture DescriptionLeaves are leathery and glossy. Fruit skin is leathery.

Photographs