Description
Quick Facts:
Common Name: Rhododendron ‘Baden Baden’ (evergreen azalea)
Botanical Name: Rhododendron ‘Baden Baden’
Position: Partial shade or dappled light; will tolerate some morning sun if soil is kept moist
Soil: Moist but well-drained, acidic (ericaceous) soil with plenty of organic matter; avoid chalky or very alkaline ground
Flowering Time: Late spring
Foliage: Evergreen
Hardiness: Fully hardy in the Irish climate once established
Eventual Height & Spread: Around 0.5–0.8m high and 0.8–1m wide over time
Growth Rate: Slow to moderate; forms a low, dense, mounding shrub
Common Name: Rhododendron ‘Baden Baden’ (evergreen azalea)
Botanical Name: Rhododendron ‘Baden Baden’
Position: Partial shade or dappled light; will tolerate some morning sun if soil is kept moist
Soil: Moist but well-drained, acidic (ericaceous) soil with plenty of organic matter; avoid chalky or very alkaline ground
Flowering Time: Late spring
Foliage: Evergreen
Hardiness: Fully hardy in the Irish climate once established
Eventual Height & Spread: Around 0.5–0.8m high and 0.8–1m wide over time
Growth Rate: Slow to moderate; forms a low, dense, mounding shrub
Why We Love It
We love ‘Baden Baden’ for its intense flower colour and tidy habit. The deep red blooms have a richness that feels luxurious, especially when repeated through a border or used to anchor a container display. It gives you that classic rhododendron look in a smaller, more manageable package – ideal for modern gardens, courtyards and tighter spaces.
The evergreen foliage means it earns its place all year round, giving structure and a dark green backdrop that makes spring bulbs and other shade-lovers really shine.
Where to Use It
- At the front of semi-shaded borders for a low, colourful edge
- In woodland-style planting with ferns, heathers and spring bulbs
- In large ericaceous containers on a terrace, balcony or by a front door
- Along paths or steps where the rich red flowers can be enjoyed up close
- In smaller gardens, rock gardens or courtyards where a full-sized rhododendron would be too large
Planting & Care
- Soil Preparation: Evergreen azaleas need acidic conditions. Work in generous amounts of ericaceous compost, leaf mould or pine needle mulch before planting. If your soil is neutral to alkaline, consider a raised bed or container with ericaceous compost.
- Planting Depth: Plant at the same depth as in the nursery pot – they dislike being planted too deeply.
- Watering: Keep the soil consistently moist, especially for the first couple of years and during dry spells. Use collected rainwater where possible in hard water areas.
- Feeding: Use an ericaceous fertiliser in early spring and again after flowering to support healthy growth and next year’s buds.
- Mulching: Mulch annually with leaf mould, bark or pine needles to help maintain soil acidity and conserve moisture.
- Pruning: Minimal pruning required. Lightly deadhead after flowering if needed and remove any dead or straggly shoots in late winter to keep the shape tidy.
Good to Know
Rhododendron ‘Baden Baden’ is an excellent choice for smaller gardens and for container planting thanks to its compact size. If you notice yellowing leaves or poor flowering, it’s usually a sign that the soil is too alkaline or that an ericaceous feed is due.
Caragh Garden Notebook – Jo’s Tips
- Use ‘Baden Baden’ in groups of three or five along a path or at the front of a border for a rich ribbon of red in late spring.
- Pair with softer pink or white azaleas and small ferns to balance the strong flower colour and create a layered, woodland feel.
- It’s brilliant in pots on a shaded terrace – just remember ericaceous compost and steady watering, especially in dry or windy spells.
- Underplant with early bulbs like snowdrops and dwarf narcissus so there’s interest before the azalea flowers, then let the evergreen foliage carry the structure for the rest of the year.






