Rhododendrons and azaleas are the stars of the heathland plant family and are highly prized for their opulent blooms in pastel and bright colors. These excellent bedding plants can also be grown in pots on a balcony or terrace by following our advice.
Why grow azaleas or rhododendrons in pots?
There are several reasons for growing azaleas or rhododendrons in pots: soil that is too chalky, lack of space or simply the absence of a garden may lead to choosing this type of cultivation.
The importance of the container and the substrate
Rhododendrons prefer to be at ease in large containers, whereas azaleas can tolerate being a little more cramped, which is important when you only have a limited amount of space.
These plants are acidophilic, so they need a substrate with an acidic pH. Plant them in very good quality heather soil. Don't forget to drain the bottom of the pot (which should be pierced) with a good layer of clay balls to allow a good evacuation of the watering.
Specificities of the culture in pot
Be careful, these plants appreciate a humid atmosphere, that's why they are so beautiful in English gardens!
Place them in half-shade if your balcony is exposed to the South, especially in Mediterranean regions where they would soon 'fry'. Spread a good layer of mulch at the foot to avoid too much evaporation and water often, especially in hot and dry weather.
Remember to remove the faded flowers so that the plant does not get exhausted.
Don't forget to repot your plants in the spring in a new substrate, or simply surface if the pot is really big.
Ideal varieties for pot culture
Some rhododendrons can form real shrubs, so it is better to turn to dwarf species and cultivars, more suitable for pot culture. Among this vast genus there are species with evergreen or deciduous foliage, the former will ensure a beautiful decor throughout the year, so they are to be preferred.
Japanese azaleas have a compact habit and pastel colored flowers. For a spreading habit, choose the variety 'Pink pancake', or the more original 'Azuma-kagami' with its bright pink interlocking corollas. White azaleas always make an impact: 'White moon' with its wavy petals will be a delight.
Rhododendron 'Blue Diamonds' is appreciated for its evergreen foliage and mauve/blue bloom, while the scarlet red of 'Elisabeth' will delight those who love bright colors.
The more subdued 'Grumpy' in pink and cream, or the pristine white 'Porzellan' are great pieces, while 'Glowing Embers' will add a little pizzazz with its large orange-red funnel-shaped flowers.
