Tai Tong Nursery in Yuen Long propagates a little-known collection of native Hong Kong shrubs that garden designer Josephine Lam sources for almost every project she undertakes. From her studio in Sheung Wan, Lam has spent fifteen years shaping more than 180 private gardens, school courtyards, and boutique hotel terraces across the SAR. Her signature is a layered, loose-textured planting style that leans heavily on indigenous species — a deliberate departure from the clipped boxwood and seasonal bedding that define so much of Hong Kong’s commercial landscaping.
Why Native Plants Matter Now
Lam argues that Hong Kong gardeners are overlooking the most logical palette for their own climate. “We live in a biodiversity hotspot with over 2,100 native vascular plant species, yet most subtropical gardens here are dominated by exotics that demand constant intervention,” she says. The ecological argument is straightforward: native plants have co-evolved with local fungi, pollinators, and rainfall patterns. Once established, they require less supplementary water, fewer chemical fertilisers, and almost no pesticide if sited correctly.
For the designer, choosing indigenous material also solves a persistent Hong Kong problem — the summer die-off of European-style perennials. Species like Gardenia jasminoides (common gardenia, actually native to the region) or Psychotria asiatica (wild coffee) hold their foliage through monsoon humidity without turning to sludge. Lam points to Ilex asprella, the rough-leaved holly, as a resilient evergreen backbone for shaded courtyard beds. Its small white spring flowers are followed by persistent black berries that attract bulbuls. “You’re building a living system, not just a decorative set piece.”
“We live in a biodiversity hotspot with over 2,100 native vascular plant species, yet most subtropical gardens here are dominated by exotics that demand constant intervention.”
A Summer-Ready Plant Palette
During the hot, wet months, Lam relies on a core group of natives that positively perform under monsoon conditions. Melastoma malabathricum (Singapore rhododendron) produces vivid mauve flowers from June to September and tolerates both waterlogged soil and brief drought once its deep roots are established. For wall-side beds that receive only dappled morning light, she specifies Ardisia crenata (coral berry), whose glossy foliage and red winter berries bring texture to the dampest corners.
In exposed rooftop situations, Rhaphiolepis indica (Indian hawthorn) serves as a wind-resistant structural shrub with pinkish-white flower clusters in early summer. Lam often pairs it with Ficus pumila (creeping fig) on boundary walls to create a cooling green envelope that reduces surface temperature by several degrees. For groundcover on small balcony floors she favours Ophiopogon japonicus (dwarf mondo grass), which creates a dark, weed-suppressing mat that requires only occasional trimming.
Summer-flowering canopy must not be ignored. Gordonia axillaris, commonly called Hong Kong Gordonia, was once widespread on the island’s hillsides and is now making a comeback in larger private gardens. Its white, camellia-like blossoms appear from May onward and drop cleanly without becoming a slippery hazard on paving — a practical consideration often missed by novice designers. Lam notes that the tree’s handsome peeling bark adds winter interest, making it a four-season asset.
The Design Process for Compact Urban Plots
Lam’s residential commissions typically involve spaces of 50 to 300 square feet — a balcony, a split-level roof, a walled yard behind a village house. Her first step is a “light and wind audit.” She tracks how sun moves across the plot in July versus January, where downdrafts from adjacent towers hit, and which corners remain perpetually shaded. “In Hong Kong, the building is your real climate,” she explains. “You’re designing inside an architectural microclimate.”
Planting follows a layered matrix. Tall, narrow species like Podocarpus macrophyllus (Buddhist pine) form a vertical accent that screens without consuming floor area. Mid-height shrubs — Lam is particularly fond of Ligustrum sinense ‘Variegatum’ (Chinese privet, a variegated cultivar of a native) — are used sparingly to define edges, while the ground plane is filled with textural natives. To create a sense of depth in a five-foot-deep balcony, she places reflective surfaces behind planting, using polished stainless-steel troughs from Wah King Garden Arts in Sai Kung or dark-glazed pots from the Prince Edward Flower Market’s ceramic specialists.
Soil depth is a perennial constraint. For most rooftop projects, Lam specifies a minimum of 35 cm of lightweight growing medium, specifying a blend of coconut coir, mature compost, and expanded shale sourced from GreenPro Horticulture in Tuen Mun. She avoids pure peat-based mixes, which are prone to compaction and hydrophobic dry-out under intense summer sun. Crucially, she insists on a drainage layer of at least 5 cm of coarse gravel or structural drainage board to prevent root rot during typhoon downpours.
“In Hong Kong, the building is your real climate. You’re designing inside an architectural microclimate.”
Where to Purchase Native Plants in Hong Kong
Securing true native stock requires diligence. Lam frequently visits Kadoorie Farm and Botanic Garden’s plant sales, held several times a year, where species such as Chloranthus spicatus and Glochidion lanceolarium are offered in small numbers. For regular supply she relies on three specialist growers: Tai Tong Nursery in Yuen Long for native shrubs and understorey plants, Hong Kong Eco-Garden in Fanling for wetland-edge species, and Brighten Floriculture for larger specimen trees including Bischofia javanica (autumn maple) and Cassia fistula (golden shower tree — naturalised rather than strictly indigenous but ecologically well integrated).
She warns against collecting plants from country parks, which is illegal and often unsuccessful because wild-dug plants have damaged root systems. Instead, she advises gardeners to propagate natives from seed or order from licensed nurseries. Several community groups now run seed-swap events; the Hong Kong Gardening Society occasionally publishes lists of recommended native-plant sources. Lam also recommends the Yuen Po Street Bird Garden not for birds but for its plant stalls, which sometimes carry insect-attracting natives like Buddleja asiatica (Asian butterfly bush) when in season.
Low-Maintenance Care Through the Wet Season
One of the most practical advantages Lam emphasises is that a well-planned native garden largely manages itself during summer. Mulching is essential: a 5 cm layer of coarse composted woodchip, applied in late May, suppresses weeds, retains soil moisture, and slowly breaks down to feed the soil microbiota. She sources bulk mulch from Green Earth Accretion in Yuen Long, which delivers in 50-litre sacks suitable for residential projects.
Pruning is minimal. Unlike the regular shearing demanded by exotic topiary, natives such as Syzygium hancei (Hance’s syzygium) and Litsea glutinosa (Indian laurel) maintain a natural habit with only the removal of dead or crossing branches. For summer-flowering species, Lam advises deadheading spent blooms of Melastoma to encourage a second flush, but leaving seed heads on Ardisia for birds. Fertiliser should be low-nitrogen and slow-release, applied at half the rate recommended for exotic flowering plants. She suggests Haifa Chemicals’ Multicote 12-0-42 formula, available at Chung Hing Garden Materials in Sheung Shui, which supplies potassium for root strength without promoting soft, pest-prone growth.
Pest and disease pressure is notably lower. Leaf-chewing insects on Psychotria asiatica are rarely problematic, and scale insects tend to be kept in check by resident sunbirds and tits. Should sooty mould appear, a spray of horticultural oil — Lam recommends Eco-Oil from Australia, stocked by several online HK gardening retailers — is effective and breaks down without residue. She stresses that a few nibbled leaves are a sign of a functioning ecosystem, not a failure.
The Future of Hong Kong’s Garden Aesthetic
Lam sees a gradual shift among her clients. “Five years ago, everyone wanted a Balinese resort look — palms, canna lilies, a water feature. Now I’m being asked for ‘woodland feel’ and ‘butterfly garden’.” She is currently working on three residential projects in the New Territories that aim to recreate, in miniature, the species composition of a fung shui wood. These plantings, though only a few years old, are already recording visits from blue glassy tigers and great Mormon butterflies.
She encourages experimentation with self-seeding annuals that rebalance Hong Kong’s sterile urban landscape. Emilia sonchifolia (lilac tasselflower) volunteers readily in cracks between paving, its soft purple pom-poms lasting from June into October. Rather than weeding it out, Lam deliberately leaves it, encouraging clients to appreciate spontaneity. “Gardening here can be a conversation with the territory’s own botanical identity. That feels more urgent than ever.”
For residents wishing to begin, her simplest brief is this: replace one exotic pot plant with a Rhododendron simsii (red azalea, native to Hong Kong’s hills) or a Dianella ensifolia (flax lily), and observe the difference in watering frequency and insect activity. From that one change, an entire rethinking of the Hong Kong garden can grow.
One of Lam’s most revealing case studies is a 120-square-foot rooftop in Kennedy Town, completed in 2021, where she tested a fully native planting scheme against a neighbouring control plot maintained with standard exotic perennials. The client, a university ecologist, helped monitor soil moisture and insect visits every fortnight for 18 months. The results were striking. The native plot required 63 per cent less supplementary water during the dry winter months, and recorded three times the number of pollinator visits — predominantly Xylocopa carpenter bees and Eurema hecabe grass yellows — between June and September. The exotic plot, by contrast, suffered three separate mildew outbreaks that required fungicide treatment. Soil bacterial diversity, measured by simple plate counts, was consistently higher in the native mix. Lam notes that the client now grows Lantana camara (wild sage) from seed sourced directly from Tai Po Kau Nature Reserve.
The data point is not anomalous. At the University of Hong Kong’s Kadoorie Biological Sciences Building, a parallel experiment using Glochidion zeylanicum and Schefflera heptaphylla (ivy tree) in institutional planters showed similarly robust performance: leaf area index remained stable through typhoon season while adjacent Ixora beds lost 40 per cent of their foliage. Lam cites these figures when convincing reticent property developers. “Numbers matter in this city. If I can show that native species reduce irrigation bills and eliminate pesticide contracts, the conversation shifts from aesthetics to economics.” She has recently begun collecting her own data, using simple soil moisture probes and weekly photo logs, to build a database that she hopes to share via the Hong Kong Gardening Society’s online forum.
