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RHODODENDRON 'Halfdan Lem'
Large deep red flowers and dark glossy leaves
Good to know - prefers plenty of light.
Pests & Diseases - vine weevils, scale insects, honey fungus, powdery mildew, bud blast.
Place of Origin - garden origin. 1967. USA. H. Lem, Seattle, Washington
Hardy - average winter - Hardy through most of the UK apart from inland valleys, at altitude and central/northerly locations. May suffer foliage damage and stem dieback in harsh winters in cold gardens. Plant can withstand temperatures down to -10°C (14°F)
Height - 2.5m (8ft)
Spread - 2.5m (8ft)
Evergreen - large leaves, 15-45cm (6-18in) long.
Medium Shrub - Typically grow to around 4-6 feet in height - very vigorous, lax shrub. Produces tight trusses of broadly funnel-shaped flowers 9cm (3½in) long
Full Sun - shelter from strong winds
Fertile moist well-drained soil - humus-rich
Neutral to acid soil - ideally pH4.5-5.5
Flower Colour - Red - deep red, fading to pink in full sun.
Cold weather damage to evergreen plants
Rhododendron - Care Guide
- Dead Heading
- Dead Heading - Video Tip ondemand_video
- Pruning - Video Tip ondemand_video
- Weed Killing
- Pests and Diseases
- Honey Fungus - Video Tip ondemand_video
- Further Reading
Rhododendron - Propagation
- Growing from seed
- Growing from cuttings
- Propagation by layering - Video Tip ondemand_video
- Propagation by other means
- Making a hybrid - Video Tip ondemand_video
- Making a hairy or scaly cross - Video Tip ondemand_video
- Caerhays bred 'Red Centurian'
Shrubs and Trees - Seeds - 1) Collecting Seeds
Shrubs and Trees - Seeds - 2) Storing Seeds
Shrubs and Trees - Seeds - 3) Planting Seeds
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 Ericoid mycorrhizal fungi
This specially adapted Rootgrow™ mycorrhizal fungi will boost the growth of acid-loving plants like rhododendrons, azaleas, heathers and blueberries. It contains ericoid and arbuscular mycorrhizal fungi, which are found in poor acidic soils where ericaceous plants naturally grow.
Fertilisers & Feeds - Empathy
Ericaceous Liquid Seaweed Fertiliser
Specially developed organic concentrated seaweed feed for ericaceous plants that is a ready to use, derived from sustainable harvested kelp, that can be used on all outdoor and indoor plants, Perfect used in conjunction with Rootgrow™ Ericoid.
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.
Slate Tie-on Plant Labels
Hand made in Cornwall, these delightful natural slate labels are perfect for pots. Comes with chalk pen. Pack of 5