Mixed Japanese Azalea Shrubs (Evergreen Collection)

What are mixed Japanese azaleas?

Japanese azaleas are compact evergreen shrubs with small, dark green leaves and masses of flowers in spring. Each mixed pack contains a selection of varieties, with flower colours and individual growth habits varying between packs. Plant them along the front of an acidic border, beneath taller shrubs or in separate pots on a sheltered terrace. Their naturally rounded growth suits informal planting, particularly where you want spring colour without a tall shrub taking over.

The small evergreen leaves provide low-growing greenery through winter, although some foliage may bronze or drop during particularly cold weather. Once flowering finishes, the rounded shrubs sit comfortably among ferns, hostas and other plants that enjoy similar conditions. The mixed varieties bring different flower shades together, with some variation in flowering time and mature shape.

Why choose a mixed Japanese azalea collection?

A mixed pack lets you establish a group of Japanese azaleas without choosing each variety separately. All enjoy acidic soil, steady moisture and a sheltered position, while their flowers bring different shades into the planting. Colours may include pink, white, red and purple, although the exact combination varies. Grouping several plants together creates a colourful spring border with subtle differences in flower shape and growth.

These azaleas also grow well in containers filled with ericaceous compost. Give each shrub its own pot, then arrange them around a sheltered patio or beside a garden seat where the spring flowers can be enjoyed close up. Containers are particularly useful in gardens with alkaline or chalky soil, as they let you provide the acidic growing conditions azaleas need. Keep pots out of strong afternoon sun and check the compost regularly for moisture.

Eventual height, spread and growth rate

Many compact Japanese azaleas reach around 60 to 90cm in height and spread over 10 to 20 years, although the final dimensions depend on which varieties are included. Growth is generally slow to moderate, with around 5 to 10cm of new shoot growth in a typical year under suitable conditions. Individual plants may grow more slowly or develop a broader shape.

Their compact, branching habit makes them suitable for smaller borders and sheltered courtyards. Allow roughly 60 to 80cm between plants where you want each shrub to develop a rounded outline. For container growing, a pot around 30cm wide and deep gives the shallow roots space to establish. Make sure it has drainage holes, as azaleas dislike sitting in waterlogged compost.

How to use mixed Japanese azaleas in your garden

Plant Japanese azaleas along a path for a low, informal flowering edge, or group them towards the front of an acidic shrub border. Their shallow roots and preference for dappled shade make them suitable beneath taller shrubs and open-canopied trees, provided there is enough moisture and limited root competition. Leave room around each plant for its rounded branches to spread.

On a patio, arrange several pots at different heights to show off the flowers, or place a pair beside a sheltered entrance. The small evergreen leaves remain attractive between flowering seasons, while the spring blooms bring colour close to seating areas. Choose a position away from drying winds and strong afternoon sun, which can scorch the foliage and leave container compost drying out too quickly.

Choosing a size

Choose from three pack options: 4 plants in 9cm pots, 4 plants in 2 litre pots or 6 plants in 2 litre pots. The smaller 9cm plants suit a new border where they have time to establish, while the 2 litre plants provide a larger starting size. The 6-plant pack is useful when planting a longer stretch of border or arranging several containers together.

All three options are supplied as potted plants. Compare the pot sizes and pack quantities below to work out which suits your planting space.

When and how to plant

Plant potted Japanese azaleas whenever the soil is workable, avoiding frozen or waterlogged ground. Spring and early autumn are particularly good times, as mild conditions help the roots establish before periods of heat or cold. Choose a sheltered spot with dappled shade and acidic, well-drained soil. Water the nursery pot thoroughly about an hour before planting.

Dig a planting hole no deeper than the rootball and about twice its width. Set the azalea with the top of the rootball level with the surrounding soil, taking care not to bury the stem. These shrubs have shallow roots and can struggle when planted too deeply. Backfill with suitable acidic soil, firm gently and water thoroughly. Where the existing soil is chalky or alkaline, grow the plants in containers of ericaceous compost instead.

Spacing and quantity guide

For a closely planted, informal flowering edge, allow 50 to 60cm between Japanese azaleas in a single row. If you prefer to see the rounded outline of each shrub, increase the spacing to 70 to 80cm. The quantities below use 55cm spacing as a guide for planning a continuous border. Check the available width as well as the length, so the shrubs have room to spread as they mature.

Watering and feeding

Keep the soil or compost consistently moist while the roots establish, and check plants more often during warm, dry weather. Japanese azaleas have fine, shallow roots, so the surface soil can dry out before deeper-rooted shrubs show signs of stress. Rainwater is preferable, especially in hard-water areas where repeated use of alkaline tap water may gradually affect compost pH.

Apply a liquid ericaceous fertiliser in early spring as the flower buds begin to swell, following the product instructions. If foliage looks pale after flowering, check soil moisture and acidity before adding more feed, as yellowing can indicate a pH problem. Avoid excessive nitrogen, which encourages soft leafy growth. Spread leaf mould, composted bark or pine needles around the roots to conserve moisture, leaving a clear gap around the stems.

Trimming and care calendar

Japanese azaleas usually hold their rounded shape with very little pruning. After flowering, remove dead, damaged or crossing stems and shorten any shoots growing beyond the main outline. Do this soon after the blooms fade, before the plant develops the flower buds for the following spring. Cutting back in late summer or autumn risks removing those buds and reducing next year's display.

Use this seasonal guide to keep on top of feeding, watering and light pruning.