Alocasia macrorrhizos

Alocasia macrorrhizos is the quintessential tropical giant. Famed for producing immense, glossy green, arrow-shaped leaves that point proudly upright toward the sky on thick, sculptural stems, it creates an instant tropical-rainforest presence in any space.

Starting with an autumn plug lets you skip the premium price tag of large summer specimens. Pot it up now, let it tick over on a bright, warm windowsill as a striking houseplant through the winter, and plant it out in spring with a well-developed root system ready to produce massive foliage from day one.

Why Start with a Winter Plug?

• Unbeatable Head Start: Alocasia can take time to wake up in spring. By establishing the root system indoors through winter, it will rocket out of the blocks as soon as the weather warms.

• Winter Architectural Accent: Makes a clean, modern statement houseplant indoors on a bright windowsill or under grow lights while garden borders sleep.

• Maximum Value: Giant Taro is notoriously costly in 2L–5L nursery pots. Growing your own from a plug delivers the exact same monster impact at a fraction of the cost.

Plant Details & Sizing

• Format: Vigorously rooted young plug plant

• Type: Tender perennial / architectural aroid

• Eventual Summer Height: 1.2m – 1.8m+ (in a single UK season; larger with age)

• Eventual Spread: 1m – 1.5m

• Foliage: Massive, heavily ribbed, glossy emerald-green shield leaves held rigidly upright

• Hardiness: Tender (keep above 7°C–10°C). Overwinter indoors or lift/store the tuber before the first winter frost.

Winter Care & Growing-On Guide

• Potting Up: Upon arrival, pot your plug into a 9cm or 1-litre pot using a chunky, aerated, well-draining compost (peat-free multi-purpose blended generously with perlite, orchid bark, or horticultural grit).

• Light & Heat: Position in bright, indirect light in a warm room (ideally 15°C–22°C). Avoid cold draughts, freezing windows, or placing directly above scorching radiators.

• Watering: Over winter, keep watering modest. Water when the top 2–3 cm of compost feels dry to the touch, and never allow the pot to sit in standing saucer water, as cold, wet roots can lead to tuber rot.

• Spring Transition: In late May, once overnight temperatures reliably stay above 10°C, step it up into a large pot (3L to 10L) or plant directly into a sheltered, partially shaded garden spot. Feed heavily with a high-nitrogen fertiliser and provide ample water in summer to unlock gargantuan leaf growth.