Alocasia Polly

How to care for Alocasia Polly

Light

Alocasia 'Polly' thrives in bright, indirect light and should be positioned near a window with filtered sunlight, such as one with a sheer curtain. Direct sun will scorch the leaves, causing pale, bleached patches, while insufficient light leads to leggy growth and loss of the vivid vein contrast. An east or north-facing windowsill in summer, or a spot a metre or so back from a south-facing window, typically suits it well.

Watering

Water when the top 2 to 3 cm of compost has dried out, then water thoroughly until it drains freely from the pot base. Overwatering is the most common cause of failure; the roots are prone to rot if left sitting in soggy compost. Reduce watering frequency during autumn and winter when the plant enters a semi-dormant phase, and always use room-temperature water to avoid cold shock.

Soil and potting

A free-draining, moisture-retentive mix is ideal. A blend of peat-free houseplant compost with perlite or coarse grit in roughly a 60:40 ratio provides the aeration and drainage the roots require. Alocasias dislike compacted, heavy media; good air circulation around the roots reduces the risk of fungal rot.

Feeding

Apply a balanced, diluted liquid fertiliser at half strength once a month during the active growing season from spring through to early autumn. Do not feed during winter when growth has slowed or stopped, as excess nutrients in the compost can cause root burn. A fertiliser with a balanced NPK or one slightly higher in nitrogen supports healthy leaf production.

Humidity and temperature

Alocasia 'Polly' demands high humidity, ideally above 60%, which is rarely met in an average UK home during winter when central heating dries the air considerably. Misting alone is insufficient; grouping plants together, placing the pot on a pebble tray partially filled with water, or using a humidifier nearby are more reliable methods. Maintain temperatures between 18 and 27 C and keep the plant away from cold draughts, radiators, and air conditioning units, all of which cause stress.

Repotting

Repot in spring every one to two years, or when roots begin to emerge from the drainage holes. Choose a pot only one size larger than the current one, as too large a pot increases the risk of waterlogging. Terracotta pots can be beneficial as they allow excess moisture to evaporate through the sides. Handle the roots gently, as they are brittle, and refresh the compost fully at each repotting.

Pruning

Routine pruning is not required. Remove yellowing, damaged, or dead leaves by cutting them cleanly at the base of the petiole using clean, sharp scissors or secateurs. Wipe the blades with rubbing alcohol before cutting to prevent the transfer of pathogens. Wear gloves when handling cut tissue, as the sap is an irritant and the plant is toxic.

Is Alocasia Polly toxic?

Common problems

How to propagate

Division of offsets

In spring, carefully remove the plant from its pot and separate any offsets or pups that have developed at the base, ensuring each division has its own roots. Pot each division individually into fresh, well-draining compost and keep warm and humid until established.

Corm separation

Mature plants produce small corms at the base; these can be carefully detached during repotting and potted shallowly in moist compost. Place in a warm, humid environment and cover loosely with a clear bag or propagator lid to retain moisture until shoots emerge.

Story and origins

The genus name Alocasia is derived from the Greek 'a', meaning without or away from, combined with 'Colocasia', a closely related genus in the Araceae family, effectively meaning 'not Colocasia'. The species epithet 'amazonica' refers to the Amazon region, though this is misleading as the plant is a cultivated hybrid. The cultivar name 'Polly' is a common diminutive name of uncertain specific origin, likely assigned by the nursery that commercialised the cultivar to make it more marketable.

The Alocasia genus is native to tropical and subtropical Asia and eastern Australia, where many species have long been cultivated for their edible corms and ornamental foliage. The hybrid Alocasia x amazonica was reputedly created by a Miami nurseryman called Salvadore Mauro in the 1950s, though detailed documentation is limited. It gained widespread popularity as a houseplant from the late twentieth century onwards, driven by the global enthusiasm for bold, architectural tropical foliage plants. The cultivar 'Polly' represents a selected, more compact, and reliably patterned form that became particularly dominant in the retail houseplant trade across Europe and North America.

Varieties to know

Alocasia amazonica 'Bambino'

A smaller, more compact version of 'Polly', reaching around 30 cm, with narrower leaves and similarly bold venation, suited to limited spaces.

Alocasia x amazonica (standard form)

The original hybrid from which 'Polly' was selected, typically slightly larger with leaves that may vary slightly in shape and vein colour.

Fun facts

• Alocasia amazonica 'Polly' is not from the Amazon at all; it was created as a nursery hybrid, most likely in Florida, USA, during the mid-twentieth century.
• The plant can enter a period of complete dormancy in winter, dying back entirely to its underground corm before regrowing in spring, which alarms many owners who assume it has died.
• The distinctive leaf shape, with its deeply lobed edges and contrasting veins, has led to widespread use of this plant as a motif in interior design and tropical-themed decor.
• Alocasia plants can produce water droplets on their leaf tips through a process called guttation, where root pressure pushes excess moisture out of specialised pores called hydathodes.

Alocasia Polly FAQ