Shield Aralia
Also known as
Dinner Plate Aralia, Shield-leaf Aralia, Hawaiian Aralia, Nothopanax scutellarium (syn.)
Keep this plant’s care guide close at hand.
Get the appAbout Shield Aralia
Polyscias scutellaria, commonly called Shield Aralia, is an evergreen shrub or small tree in the Araliaceae, prized indoors for its bold, round to shield-shaped leaves that create a dense, architectural silhouette. In the tropics it forms upright, woody stems and can reach several meters outdoors, but typically stays 1–2 m in containers. Leaves are glossy, leathery, and often shallowly scalloped; cultivars may show creamy variegation. It is slower-growing and appreciates stable, warm conditions with consistent moisture and humidity. Frequently used as a hedge or specimen in tropical landscapes, it also adapts well to large indoor planters and even bonsai. Shield Aralia is sometimes confused with Polyscias balfouriana (Balfour Aralia); P. scutellaria generally bears broader, more uniformly round, “dinner-plate” leaves. Sensitive to drafts, low humidity, and overwatering, it will shed leaves if conditions swing abruptly. Given bright, filtered light, a well-aerated mix, and gentle feeding, it rewards with lush, layered foliage and a stately, upright habit.
Taxonomy
Properties & Requirements
How to care for Shield Aralia
Water
Water thoroughly when the top 2–3 cm (about 1 inch) of mix feels dry, allowing excess to drain completely. Aim to keep the root zone evenly moist but never waterlogged. In bright, warm conditions, this may mean weekly watering; reduce frequency in winter or lower light. Use room‑temperature, low‑alkalinity water if possible. Never let the pot sit in a saucer of runoff. Watch for signals: drooping and crispy edges suggest underwatering; yellowing and leaf drop can indicate overwatering.
Light
Bright, filtered light is best—an east window with morning sun or a bright, sheer-curtained south/west exposure. It tolerates medium light but may grow leggy with larger leaf spacing. Protect from harsh midday sun, which can scorch, especially on variegated cultivars; acclimate gradually if increasing light. In low light, reduce watering and expect slower growth. Under quality grow lights, aim for 10–12 hours daily at moderate intensity.
Nutrients
Feed lightly but regularly during active growth (spring through early autumn). Use a balanced, diluted liquid fertilizer (e.g., 3-1-2 or 10-10-10 at 1/4–1/2 strength) every 4–6 weeks, or a gentle controlled-release formulation. Ensure micronutrients, especially magnesium and iron, to prevent chlorosis under bright light. Flush the potting mix with plain water every 6–8 weeks to minimize salt buildup. Do not fertilize when light is low, growth is stalled, or the plant is stressed.
Temperature
Provide warm, stable conditions: 18–29°C (65–85°F) is ideal. Avoid temperatures below 15°C (59°F) and protect from cold drafts, air conditioners, or sudden night drops. Rapid temperature swings often trigger leaf shed. Good air movement helps prevent disease, but do not place in the path of heaters. Outdoors in the tropics, it tolerates heat if humidity and moisture are adequate; indoors, keep it away from radiators and exterior doors.
