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RHODODENDRON 'Fastuosum flore pleno'
Very hardy hybrid with mauve semi-double flowers
Good to know - an excellent substitute for ponticum, the wild variety which is invasive. Fast-growing. Ideal for hedging or screening.
Pests & Diseases - vine weevils, scale insects, honey fungus, powdery mildew, bud blast.
Place of Origin - garden origin. Belgium. Francoisi brothers. Pre. 1846.
Hardy - very cold winter - Hardy in all of UK and northern Europe. Plant can possibly withstand temperatures down to -20°C (-4°F)
Height - 4m (12ft)
Spread - 4m (12ft)
Evergreen - medium-sized leaves 5-15cm (2-6in) long.
Tall Shrub - dome-shaped shrub. Long-lasting trusses of funnel-shaped, wavy-margined flowers 5-7cm (2-3in) 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 - Purple - Shades of purple/mauve/lilac/violet - mauve, with brown-crimson flashes inside.
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