Growing Mammoth Elephant Ears in Pittsburgh: Planting, Care, and Winter Storage

Planting Time and Method

Wait until mid-May when soil has warmed (65°F+). Plant corms pointed end down, covered by 4 inches of soil. Space 3–4 feet apart. They thrive in full sun to part shade with abundant water and heat.

Summer Care

• Water deeply 1–2 times weekly if no rain; never let soil dry out.
• Fertilize monthly with balanced fertilizer.
• Leaves can reach 4–6 feet; provide wind shelter if possible.

Overwintering in Zone 5/6

1. After first frost kills foliage, dig corms carefully.
2. Brush off soil (do not wash).
3. Cure in a warm, dry, airy spot for 1–2 weeks.
4. Store in peat moss or vermiculite at 45–50°F in a cardboard box or mesh bag.
5. Replant next spring after last frost.

Key Point

Elephant ears (Colocasia/Alocasia) are tropical — they will not survive Pittsburgh winters in the ground. Annual digging and storage is essential.