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Ilex crenata - Thunb.
                 
Common Name Japanese Holly, Box Leaved Holly
Family Aquifoliaceae
USDA hardiness 6-8
Known Hazards Although no specific reports of toxicity have been seen for this species, the fruits of at least some members of this genus contain saponins and are slightly toxic. They can cause vomiting, diarrhoea and stupor if eaten in quantity[274].
Habitats Thickets, woods and wet places in lowland and mountains all over Japan[58].
Range E. Asia - China, Japan, Korea.
Edibility Rating  
Other Uses  
Weed Potential No
Medicinal Rating  
Care
Fully Hardy Moist Soil Semi-shade Full sun

Summary
Bloom Color: Green, White. Main Bloom Time: Early spring, Late spring, Mid spring. Form: Rounded.

Ilex crenata Japanese Holly, Box Leaved Holly


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Ilex crenata Japanese Holly, Box Leaved Holly
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Physical Characteristics
 icon of manicon of shrub
Ilex crenata is an evergreen Shrub growing to 5 m (16ft) by 3 m (9ft) at a slow rate.
It is hardy to zone (UK) 6. It is in leaf 12-Jan It is in flower from May to June, and the seeds ripen from Sep to October. The flowers are dioecious (individual flowers are either male or female, but only one sex is to be found on any one plant so both male and female plants must be grown if seed is required) and are pollinated by Bees.The plant is not self-fertile.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils. Suitable pH: acid, neutral and basic (alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist soil.

Synonyms

Habitats
Woodland Garden Dappled Shade; Shady Edge; Hedge;
Edible Uses
Edible Parts: Fruit.
Edible Uses:

Fruit[105, 177]. No further details are given, but some caution is advised[K].The fruit is about 5mm in diameter[200].
Medicinal Uses
Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.



None known
Other Uses
Hedge;  Hedge.

Very amenable to trimming, this species is often grown as a hedge in N. America and Japan. It can also be used in topiary[182].
Cultivation details
Landscape Uses:Border, Espalier, Foundation, Hedge, Massing, Seashore, Superior hedge. Succeeds in most soils so long as they are not water-logged[200]. Prefers a moist loamy soil[1]. Fairly slow growing. Plants are hardy to about -20°c[184]. A number of named varieties have been selected for their ornamental value[182]. Resents root disturbance, especially as the plants get older[11]. It is best to place the plants into their permanent positions as soon as possible, perhaps giving some winter protection for their first year or two[K]. Any transplanting is best done in May or, preferably, in September. Dioecious. Male and female plants must be grown if fruit and seed is required. Special Features:Not North American native, Inconspicuous flowers or blooms.
Propagation
Seed - best sown as soon as it is ripe in the autumn in a cold frame. It can take 18 months to germinate. Stored seed generally requires two winters and a summer before it will germinate and should be sown as soon as possible in a cold frame. Scarification, followed by a warm stratification and then a cold stratification may speed up the germination time[78, 80]. The seedlings are rather slow-growing. Pot them up into individual pots when they are large enough to handle and grow them on in light shade in a cold frame for their first year. It is possible to plant them out into a nursery bed in late spring of the following year, but they should not be left here for more than two years since they do not like being transplanted. Alternatively, grow them on in their pots for a second season and then plant them out into their permanent positions in late spring or early summer. Give them a good mulch and some protection for their first winter outdoors. Cuttings of almost ripe wood with a heel, August in a shaded position in a cold frame. Leave for 12 months before potting up. Layering in October. Takes 2 years.
Other Names
Found In
Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

Conservation Status
IUCN Red List of Threatened Plants Status :
Related Plants
Latin NameCommon NameEdibility RatingMedicinal Rating
Ilex aculeolata 10
Ilex aquifoliumHolly, English holl, Christmas Holly, Common Holly, English Holly22
Ilex asprella 02
Ilex cassineCassine, Dahoon, Cassine Holly11
Ilex chapaensis 10
Ilex coriaceaLarge Gallberry10
Ilex cornutaHorned Holly, Chinese holly12
Ilex glabraInkberry10
Ilex integraMochi Tree10
Ilex latifoliaTarajo10
Ilex macropoda 10
Ilex opacaAmerican Holly22
Ilex pedunculosa 11
Ilex pubescens 02
Ilex purpurea 02
Ilex rotundaKurogane holly01
Ilex verticillataWinterberry, Common winterberry13
Ilex vomitoriaYaupon Holly,11
Ilex x altaclerensisHolly00
Ilex yunnanensis 01
Quercus ilexHolly Oak, Evergreen Oak52
Quercus ilex ballotaHolm Oak52
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Thunb.
Botanical References
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Subject : Ilex crenata  

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