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MAGNOLIA acuminata 'Blue Opal'
Commonly known as Cucumber tree
Spectacular blue buds turn dark yellow as they open. This is a unique colour in the magnolia world
Further Reading....
- Magnolia - A guide to sizing and pricing
- Magnolia - Care Guide
- Magnolia - Hybridisation
- Magnolia - Propagation
- Magnolia - Spotlight Videos
- Planting to avoid allergic reactions and asthma
- Shrubs and Trees - Seeds - 1) Collecting Seeds
- Shrubs and Trees - Seeds - 2) Storing Seeds
- Shrubs and Trees - Seeds - 3) Planting Seeds
- Trees - Care Guide
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DeciduousLeaves to 25cm (10in) long, dark green above, lighter and softly hairy beneath
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Yellowdark yellow flowers -
Height15m (49ft) -
Spread8m (26ft)
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Tall Shrub
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Tree
-
Hardy - cold winterHardy in most places throughout the UK even in severe winters. May not withstand open/exposed sites or central/northern locations. Plant can withstand temperatures down to -15°C (5°F) -
Full sunshelter from strong winds. -
Partial shade
MAGNOLIA acuminata 'Blue Opal'
-
Additional Features
Good to know'acuminata' is more tolerant of alkaline soils. A compact shrub maturing over decades into a tree
Pests & DiseasesScale insects, honey fungus, coral spot.
Place of originGarden origin. -
Burncoose SpecialitiesMagnolias - larger gardens
-
Core PlantsMagnolia
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Flower ShapeCup-shaped10cm (4in) across
-
HardinessFully hardy
-
Leaf margin
Entire(see photos above) -
Leaf shape
Elliptic
(see photos above)
Oblong(see photos above)
Ovate(see photos above) -
Pruning group
Pruning group 1Suitable for: Deciduous and evergreen trees, and some deciduous shrubs.
Pruning: Minimal pruning required. Prune wayward or crossing branches to maintain a healthy framework.
When: When dormant in the late winter/early spring. Some in the summer/autumn to prevent bleeding of sap.
RHS group 1 -
Seasonal InterestSpringSummer
-
Soil ConditionsFertile moist well-drained soilHumus-richNeutral to acid soil
-
Tree ShapeBroadly conical
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Magnolia - A guide to sizing and pricing
Magnolia - Care Guide
- Cultivation of Magnolias
- Pruning Magnolias - Video Tip ondemand_video
- Pruning shoots on grafted rootstock - Video Tip ondemand_video
- Pruning small & large shoots below the graft - Video Tip ondemand_video
- Pruning & Shaping Magnolia - Video Tip ondemand_video
- Soil Conditions
- Planting Locations
- Planting a magnolia - Video Tip ondemand_video
- Scraping deadwood to see if alive - Video Tip ondemand_video
- Pests and Diseases
- Magnolia Slug Protection - Short Video Tip ondemand_video
- Slug Protection - Longer Video Tip ondemand_video
- Removing Ivy - Video Tip ondemand_video
- Scale Insect on Magnolias - Video Tip ondemand_video
- Further Reading
Magnolia - Hybridisation
Magnolia - Propagation
- Planting Magnolia from Seeds
- Magnolia seed collection - Video Tip ondemand_video
- Magnolia Seedlings - Video Tip ondemand_video
Magnolia - Spotlight Videos
- Best yellow magnolias - Video Tip ondemand_video
- Magnolia 'Caerhays Belle'
- M. campbellii in late January - Video Tip ondemand_video
- Magnolia campbellii 'Alba' - Video Tip ondemand_video
- M. campbellii alba 'Strybing White' - Video Tip ondemand_video
- Magnolia globosa - Video Tip ondemand_video
- Magnolia insignis - Video Tip ondemand_video
- Magnolia 'Lanarth' - Video Tip ondemand_video
- Magnolia 'Lois', 'Peachy' & 'Limelight'
- Magnolia 'Peachy' and 'Daybreak' Video Tip ondemand_video
- M. 'Pink Flush' in June - Video Tip ondemand_video
- Magnolia 'Tikitere' - Video Tip ondemand_video
- M. 'Star Wars', doltsopa & veitchii - Video Tip ondemand_video
- M. sieboldii, sieboldii sinensis, x wieseneri, 'Summer Solstice' - Video Tip ondemand_video
- M. 'Altas', 'Raspberry Fun', 'Sunrise' & x veitchii - Video Tip ondemand_video
- Magnolia 'Tropicana' - Video Tip ondemand_video
- Magnolia 'Todd's Forty Niner' - Video Tip ondemand_video
- M. 'Todd's Forty Niner' Late January - Video Tip ondemand_video
- Various Magnolias in early March - Video Tip ondemand_video
- Michelia foveolata - Video Tip ondemand_video
- Michelia macclurei - Video Tip ondemand_video
- 5 Michelias in April - Video Tip ondemand_video
- M. 'Woodsman' x 'Patriot' - Video Tip ondemand_video
- Unnamed hybrids - Video Tip ondemand_video
Planting to avoid allergic reactions and asthma
- Allergic reactions and pollen
- Plants which produce masses of pollen - to avoid
- Plants producing little pollen - relatively safe!
Shrubs and Trees - Seeds - 1) Collecting Seeds
- When is the right time to collect seeds?
- When are seeds actually ripe and ready for collection?
- Magnolia seed collection - Video Tip ondemand_video
- Cornus capitata seed collection - Video Tip ondemand_video
- Lithocarpus Seed Collection - Video Tip ondemand_video
- Rhododendron seed collecting - Video Tip ondemand_video
- Camellia seed collection - Video Tip ondemand_video
Shrubs and Trees - Seeds - 2) Storing Seeds
- Storing seeds over winter
- Embothrium Collecting and Storing Seeds
- Decaisnea Seed Collection & Potting
Shrubs and Trees - Seeds - 3) Planting Seeds
Trees - Care Guide
- How to plant a tree - Video Tip ondemand_video
- How to plant a tree
- Ties - Video Tip ondemand_video
- Restaking fallen young trees - Video Tip ondemand_video
- Fallen old tree - Video Tip ondemand_video
- Clearing up fallen beech tree - Video Tip ondemand_video
- Spring pruning - Video Tip ondemand_video
- Removing side shoots - Video Tip ondemand_video
- Pruning and Shaping Magnolia - Video Tip ondemand_video
- Deer protection - Video Tip ondemand_video
- Weed Spraying - Video Tip ondemand_video
- Removing Ivy - Video Tip ondemand_video
- Removing wire protection - Video Tip ondemand_video
- Tree Survey - Video Tip ondemand_video
- Crown uplift - Video Tip ondemand_video
- Removing shoots below graft - Video Tip ondemand_video
- Removing peeling bark - Video Tip ondemand_video
- Maintaining variegation - Video Tip ondemand_video
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15m (49ft)
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8m (26ft) |
Useful extras...
Fertilisers & Feeds - Vitax
Q4 Pelleted Fertiliser
A useful fertiliser suitable for use on a wide variety of plants. Q4 provides all the nutrients and trace elements essential for vigorous growth, abundant flowering and ripening of fruit.
3 options from £6.00
Fertilisers & Feeds - Empathy
Rootgrow mycorrhizal fungi
Recommended by the RHS. Contains Rootgrow™ mycorrhizal fungi. Suitable for all trees and shrubs (except rhododendrons, azaleas, heathers, cranberries and blueberries)
2 options from £6.00
Fertilisers & Feeds - Empathy
All-purpose Seaweed Stimulant
All-purpose organic concentrated seaweed feed that is a ready to use, derived from sustainable harvested kelp, that can be used on all outdoor and indoor plants, except acid loving plants.
Perfect used in conjunction with Rootgrow™.
Only £7.50
Vermin & Pest Control
Slug Pellets
Slug killer blue mini pellets are easy to use and give effective control of slugs and snails.
Ideal in garden, conservatory or greenhouse.
Only £6.50
Vermin & Pest Control
Copper Tape
Quick and easy way to repel slugs and snails from your pots with this adhesive copper tape.
Only £7.50
Garden Goodies
Slate Plant Labels
These wonderfully tactile natural slate plant labels are hand made in Cornwall and come with a chalk pen.
Just stick them in your pot or border. Pack of 6.
Only £10.20
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