Citrus trifoliata
Japanese bitter orange, Hardy orange, Trifoliate orange
Also known as Aegle sepiaria, Poncirus trifoliata
- Height × spread
- 4m × 4m
- Position
- Full sun
- Hardiness
- Cold to -15C (RHS H5)
- Flowers
- Spring, Autumn
Availability
Please ask in store about availability
Many plants are seasonal. Call 01234 567890 to check current stock.
About this plant
This is a curious shrub for a hot place. It has spreading branches with lots of spines which are grey to bright-green. There are some bright-green leaves and white orange blossom-like flowers in spring. These have a delicious perfume. The flowers are followed by fruits which start green but ripen to spherical yellow balls several centimetres across. They remain after leaf fall, caught amongst the bare branches like floats on a fishing net. Apparently you can use the fruits to make marmalade but it has an 'unusual' taste! In mild areas it makes a very spiny and effective hedge.
- Flower colour
- White
- Foliage colour
- Green
- Autumn foliage
- Yellow
- Stem colour
- Green, Grey
- Fruit colour
- Yellow
- Variegated
- No
- Scent
- No
- Shape
- Bell
- Height
- 4m
- Spread
- 4m
- Height in 10 years
- 2m
- Spread in 10 years
- 2m
- Season of interest
- Spring, Autumn
- Flowers in
- Spring, Autumn
- Evergreen
- Deciduous
- Garden style
- Scented garden, Mediterranean garden, Indoors, Exotic garden, Conservatory
- Sun or shade
- Likes full sun
- Soil type
- Loam (normal)
- Soil pH
- All types
- Drainage
- Well drained soil, Dry soil, Drought resistant
- Hardiness
- Cold to -15C (RHS H5)
- Borders & containers
- Borders
- Indoor light
- A light position not direct sun
- Indoor temperature
- 5C minimum temperature
- Use for
- Wall cover, Structural, Coloured stems, Bird attraction
- Walls
- East, South, West facing
- Hazards
- Yes, stems are prickly/thorny
AutumnNow
Autumn · Planting
Reduce fruit to prevent branches breaking
Inspect the tree as fruit grows - reduce the numbers of fruit at the ends of branches to prevent branches breaking under their weight. This will also increase the size of remaining fruit. This is especially needed for young trees.
Spring
Spring-Autumn · Indoors
Water regularly during growth
Water regularly while in growth
Adopt a regime whereby plants are thoroughly watered every week so that they do not become dessicated. In hot weather watering may need to be more frequent, but less often in cool or moist conditions.
Spring-Autumn · Indoors
Feed with citrus plant food
Feed citrus plants a high nitrogen citrus Summer food from March to October, and a citrus Winter food November to February.
Spring-Autumn · Outdoors
Water regularly during growth
Water regularly while in growth.
Adopt a regime that means the plants are thoroughly watered every week so that they do not become dessicated. In hot weather watering may need to be more frequent, but less often in cool or moist conditions.
Spring-Autumn · Outdoors
Feed with citrus plant food
Feed citrus plants a high nitrogen citrus Summer food from March to October, and a citrus Winter food November to February.
Winter
Winter-Spring · Indoors
Water lightly in winter
The soil should remain just moist during the cold months when the plant is not in growth. Trickle a little water onto the soil surface every couple of weeks if the soil is dry. Do nothing if it is moist.
The roots remain active in winter and benefit from small amounts of moisture so they don't become completely desiccated.
Winter · Outdoors
Water sparingly during dormancy
In its dormant period give very little water, keeping the soil barely moist. Dormancy is likely to be during the winter and the plant recommences growth in early to mid spring.
When a plant enters dormancy the leaves fade, go yellow and then brown. Eventually the whole plant may 'disappear' or unadorned stems may remain.
Planting & general
Outdoor planting · Planting
Add root growth stimulant to the planting hole
Mycorrhizal fungi helps roots establish quickly, so they absorb water and nutrients more efficiently. It comes as a powder, granule or gel. Add to the planting hole or container, and to the plant's rootball before planting in the hole. For "bareroot" plants use a gel.
Indoor temperature · Planting
5C minimum temperature
This plant requires a minimum temperature of 5 Centigrade.
Compost · Planting
Compost for citrus plants
Use citrus compost when planting in pots, or to improve soils when planting in the ground.
Indoor plant · Planting
Position in indirect light indoors
Give the plant a position that is cool and light, and away from direct sunshine.
Found in
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