Best used for
- Boundary walls and compound screening on campuses and factories
- Narrow medians and verges where canopy trees will not fit
- Formal avenue rhythm along driveways and approach roads
- Noise and dust buffers between a road and a building line
Avenue tree
Ashoka (Mast Tree)
The narrow evergreen column used everywhere space is tight — boundary screens, narrow medians and tight avenues where a spreading canopy is impossible.
About Ashoka (Mast Tree)
Polyalthia longifolia var. pendula is not a shade tree and should never be specified as one. It is a green architectural element: a dense, dark, weeping column two to three metres wide that can be planted at three-metre centres to make a continuous evergreen wall eight metres high. Nothing else in the Indian palette does that.
Because it is narrow, it fits places where a canopy tree becomes a liability — a 2 m median, a boundary strip against a compound wall, a driveway edge with a building close behind. Because it is evergreen and dense, it screens all year and traps a genuine amount of road dust, which is why it lines so many industrial frontages.
The confusion worth clearing up: this is not the true ashoka. Saraca asoca is a different, smaller tree with orange flower clusters and cultural significance. Nurseries sell Polyalthia as ashoka, and specifications should carry the botanical name so nobody is surprised on delivery.
Do not use where
- Anywhere shade is the actual requirement — the column casts almost none
- Exposed high-wind sites without staking in the first two years
| Botanical name | Polyalthia longifolia var. pendula |
|---|---|
| Family | Annonaceae |
| Also called | False ashoka, Mast tree, Indian fir, Debdaru |
| Mature height | 8–12 m |
| Spread | 2–3 m only |
| Growth rate | Moderate |
| Sunlight | Full sun to light shade |
| Water need | Moderate |
| Soil | Adaptable; prefers drained loam |
| Climate | Tropical and subtropical; established trees handle NCR winters well |
| Flowering | Pale green star flowers, February–April; inconspicuous but fragrant |
| Spacing | 2–3 m on centre for a screen; 4 m for individual columns |
| Planting window | June–September; February–March with irrigation |
| Establishment | 1–2 monsoons |
| Maintenance | Low |
| Pollution tolerance | Very high |
| Drought tolerance | Moderate |
| Transplanting | One of the easiest large plants to move in Indian landscaping — a common choice for instant screens. |
Care
Season-by-season care calendar
| Season | What to do |
|---|---|
| February–March | Light trim to keep the column tidy; remove any competing leaders. Feed once with balanced fertiliser. |
| April–June | Water weekly through the first two summers. Foliage browns visibly if the tree is allowed to dry out. |
| July–September | Best planting window. Re-stake and re-plumb any leaning columns. |
| October–January | Inspect the row for gaps and infill — a screen with holes is not a screen. |
Troubleshooting
Common problems and what causes them
| Symptom | Cause | Fix |
|---|---|---|
| Leaning after a storm | Tall narrow crown and a modest root plate | Stake for the first two years with two padded ties, and re-plumb promptly. Once rooted, the species holds well. |
| Bare patches low on the column | Shading from adjacent planting, or spacing too tight | Keep 2 m minimum between trunks and remove crowding shrubs. Lower foliage does not regenerate quickly. |
| Mealybug colonies in leaf axils | Dense still foliage and dust | Horticultural oil spray in two rounds two weeks apart; hose down dust in dry months. |
Plant with
Species that work alongside it
palms
Chinese Fan Palm
Livistona chinensis
A hardy fan-leaved palm with drooping leaf tips — slower and shorter than the feather palms, and one of the few that genuinely tolerates part shade.
- Height9–12 m over decades; usually seen at 3–5 m in landscapes
- WaterModerate
- MaintenanceLow
hedges and screens
Golden Duranta
Duranta erecta "Golden Edge"
The bright chartreuse hedge that gives Indian landscapes their colour block — fast, cheap, endlessly clippable and visible from a distance without any flowers at all.
- Height0.3–2 m as clipped; 3 m unpruned
- WaterModerate
- MaintenanceHigh — this is a clipping-dependent plant
flowering shrubs
Ixora
Ixora coccinea
The dense, compact, glossy-leaved flowering shrub used for formal massing at entrances and along walkways — dependable in the south and east, fussier about winter in the north.
- Height0.6–2 m depending on cultivar
- WaterModerate
- MaintenanceModerate
lawns and groundcovers
Korean Grass
Zoysia tenuifolia / Zoysia japonica
The fine, soft, deep-green ornamental turf of premium Indian landscapes — beautiful, slow, weed-resistant once closed, and completely unsuited to foot traffic.
- HeightMown at 15–25 mm; often left unmown as a mounded carpet
- WaterModerate
- MaintenanceModerate
Ashoka (Mast Tree) — frequently asked questions
Is ashoka tree good for boundary walls?
It is the standard choice. At 2.5–3 m centres it forms a continuous evergreen screen within two to three years, stays narrow enough not to overhang the neighbour, and needs no clipping.
Is Polyalthia longifolia the real ashoka tree?
No. The true ashoka is Saraca asoca. Polyalthia is the "false ashoka" or mast tree — always specify by botanical name.
Does ashoka give shade?
Very little. Its crown is narrow and vertical. Use it for screening and rhythm, and use neem, arjuna or karanj where shade is required.
Related
Guides and services
Core service
Landscape Execution and Plantation
Full softscape execution for campuses, townships, industrial sites and public realm — from soil and levels through planting, lawns and irrigation to a working maintenance handover.
Service detailCorridor execution
Highway and Expressway Plantation
Avenue, median, embankment and interchange planting for expressway and highway packages — designed for survival at handover, not just for the drawing.
Service detailSpecifying Ashoka (Mast Tree) on a project?
We supply, plant and maintain across India. Send the site conditions and quantities and we will confirm whether this species is the right call before you order it.