| Regno | Plantae |
| Sottoregno | Tracheobionta |
| Superdivisione | Spermatophyta |
| Divisione | Magnoliophyta |
| Classe | Liliopsida |
| Ordine | Alismatales |
| Famiglia | Araceae |
| Sottofamiglia | Aroideae |
| Genere | Arum |
| Specie | Arum maculatum |
Arum maculatum is a tuberous perennial in the family Araceae, grown for its arrow-shaped foliage and showy fruit; all parts are toxic.
Luce
Arum prefers bright, indirect light to partial shade. The classic Arum italicum tolerates quite deep shade — making it useful for difficult low-light positions. Avoid direct harsh sun. Many Arum species are adapted to woodland conditions with dappled light.
Acqua
During active growth, keep the soil moderately moist. Allow the top 2–3 cm to dry between waterings. Arum is tuberous and undergoes a summer dormancy period (leaves yellow and die back naturally in early summer) — drastically reduce watering at this point. Resume normal watering in autumn when new growth emerges.
Substrato
Rich, moisture-retentive but well-draining mix: 60% potting compost, 20% coco coir, 20% perlite. Arum grows naturally in woodland soils rich in leaf mould.
Temperatura e umidità
Arum italicum is cold-hardy to -10 °C and is primarily an outdoor plant. As a houseplant, cool to moderate temperatures (10–20 °C) are preferred. Standard indoor humidity is adequate.
Concimazione
Feed monthly during spring with a balanced liquid fertilizer. Reduce in summer as the plant enters dormancy.
Potatura
⚠️ ALL PARTS OF ARUM ARE HIGHLY TOXIC — the berries in particular contain high concentrations of calcium oxalate and arum toxins. Keep strictly away from children and all pets. Wear gloves when handling. Remove the flowering spadix if berries are a concern.
Divisione
Primary method during summer dormancy when plant dies back completely.
Semina
Fresh seed sown immediately after berry ripening; slow but produces strong plants.