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Ilex crenata 'Convexa'

Description

Convexa Japanese Holly is a handsome evergreen shrub in the Aquifoliaceae family. It is an extremely dense shrub that does well with heavy pruning and topiary for hedging and grows up to 8 1/5". The plant flowers in late spring and its fruits ripen in the fall. The fruits are black and not showy and the leaves are usually smaller than the 'Hetzii' or 'Latifolia' cultivars. It tolerates drought and air pollution, as well as poor, sandy, and clay soils. The plant has a slow growth rate, likes to be in the shade, is easily transplanted, and does not like Alkaline soils. This holly is susceptible to spider mites and iron and nitrogen deficiencies. 

Quick ID Hints:

  • Undersides of leaves are dotted with black glands.
  • New stems are green and turn grayish after 2 or 3 years.
  • Leaf is convex, around 1cm, and too small to fit on a fingertip.
  • The small green leaves are crenate and all are convex.

More information on Ilex crenata.

Cultivars / Varieties:
Tags:
#bees#white#evergreen#white flowers#green#shrub#wildlife plant#green flowers#nectar plant#spring flowers#clay soil#air pollution tolerant#clay#specialized bees#sandy soil#clay tolerant#sandy soil tolerant#clay soil tolerant#pollinator plant#black fruits#japanese#sandy#poor soils tolerant
 
Cultivars / Varieties:
Tags:
#bees#white#evergreen#white flowers#green#shrub#wildlife plant#green flowers#nectar plant#spring flowers#clay soil#air pollution tolerant#clay#specialized bees#sandy soil#clay tolerant#sandy soil tolerant#clay soil tolerant#pollinator plant#black fruits#japanese#sandy#poor soils tolerant
  • Attributes:
    Genus:
    Ilex
    Species:
    crenata
    Family:
    Aquifoliaceae
    Life Cycle:
    Woody
    Recommended Propagation Strategy:
    Stem Cutting
    Country Or Region Of Origin:
    Japan
    Wildlife Value:
    The small fragrant flowers attract bees. Members of the genus Ilex support the following specialized bee: Colletes banksi.
    Particularly Resistant To (Insects/Diseases/Other Problems):
    Moderately resistant to damage by deer
    Dimensions:
    Height: 6 ft. 0 in. - 8 ft. 0 in.
    Width: 4 ft. 0 in. - 5 ft. 0 in.
  • Whole Plant Traits:
    Plant Type:
    Shrub
    Leaf Characteristics:
    Broadleaf Evergreen
    Habit/Form:
    Dense
    Erect
    Spreading
    Growth Rate:
    Slow
    Maintenance:
    Medium
    Texture:
    Medium
  • Cultural Conditions:
    Light:
    Full sun (6 or more hours of direct sunlight a day)
    Partial Shade (Direct sunlight only part of the day, 2-6 hours)
    Soil Texture:
    High Organic Matter
    Loam (Silt)
    Sand
    Soil pH:
    Acid (<6.0)
    Soil Drainage:
    Good Drainage
    Available Space To Plant:
    3 feet-6 feet
    NC Region:
    Coastal
    Mountains
    Piedmont
    Usda Plant Hardiness Zone:
    5a, 5b, 6a, 6b, 7a, 7b
  • Fruit:
    Fruit Color:
    Black
    Display/Harvest Time:
    Fall
    Fruit Type:
    Berry
    Drupe
    Fruit Length:
    < 1 inch
    Fruit Width:
    < 1 inch
    Fruit Description:
    Inconspicuous globose, berry-like black drupe that is slightly greater than 1/5" in length. Only female plants have fruits. Fruits ripen in fall and are not showy.
  • Flowers:
    Flower Color:
    Green
    White
    Flower Inflorescence:
    Cyme
    Flower Bloom Time:
    Spring
    Flower Petals:
    4-5 petals/rays
    Flower Size:
    < 1 inch
    Flower Description:
    Non-showy greenish white flowers in spring that form in clusters of 2 to 3 and are 2/10' in length. Flowers bloom in late spring.
  • Leaves:
    Leaf Characteristics:
    Broadleaf Evergreen
    Leaf Color:
    Black
    Green
    Purple/Lavender
    Leaf Feel:
    Glossy
    Leathery
    Smooth
    Waxy
    Leaf Type:
    Simple
    Leaf Arrangement:
    Alternate
    Leaf Shape:
    Elliptical
    Lanceolate
    Oblong
    Obovate
    Leaf Margin:
    Crenate
    Serrate
    Hairs Present:
    No
    Leaf Length:
    < 1 inch
    Leaf Width:
    < 1 inch
    Leaf Description:
    Leaves are glossy black-green in color and the underside of the leaves are dotted with blackish pellucid glands. The leaf is too small to fit on a fingertip (around 2/5"-1/2" in length), and are crenate and convex.
  • Stem:
    Stem Color:
    Brown/Copper
    Green
    Stem Is Aromatic:
    No
    Stem Surface:
    Hairy (pubescent)
    Stem Description:
    Stems are green on current season of growth and turn gray-green to gray-brown by year 2 or 3. Young stems are often densely pubescent.
  • Landscape:
    Landscape Location:
    Coastal
    Container
    Lawn
    Patio
    Recreational Play Area
    Slope/Bank
    Walkways
    Landscape Theme:
    Formal English Garden
    Pollinator Garden
    Design Feature:
    Border
    Foundation Planting
    Hedge
    Mass Planting
    Small groups
    Attracts:
    Bees
    Pollinators
    Specialized Bees
    Resistance To Challenges:
    Deer