How to grow calathea
Overview
Calathea orbifolia is a herbaceous perennial grown for its large, round, silver-striped foliage. It thrives in warm, humid conditions and is a standout specimen for shaded garden beds or indoor containers.
Soil Preparation
Use a loose, well-draining mix rich in organic matter, such as a blend of peat, perlite, and compost. Aim for a pH of 6.0–6.5. Ensure the pot or bed has excellent drainage to prevent root rot.
Growing Guide
Position Calathea orbifolia in a sheltered spot with dappled or part shade, avoiding direct afternoon sun. Use a rich, well-draining potting mix or loamy soil amended with organic matter. Space plants 40–60 cm apart to allow air movement. Keep soil consistently moist but not waterlogged, and maintain humidity above 60% by grouping plants or using a pebble tray. In temperate zones, wait until after the last frost to plant out.
Care
Feed monthly from spring to summer with a balanced liquid fertiliser at half strength. Remove yellowed or damaged leaves at the base to encourage fresh growth. Repot every 2–3 years in spring if rootbound.
Companion Planting
Pair Calathea with ferns, peace lilies, and philodendrons for a cohesive shade garden. Avoid placing near plants that demand full sun or dry soil, such as lavender or succulents.
Common Pests & Risks
Spider mites are common in dry air; increase humidity and mist leaves regularly. Leaf edge burn indicates low humidity or fluoride in water; use filtered or rainwater. Scale can be treated with horticultural oil.
Troubleshooting
Yellow leaves: overwatering or poor drainage; let soil dry slightly between waterings. Brown leaf edges: low humidity or fluoride in tap water; use filtered water and increase humidity. Drooping stems: underwatering or cold draught; check soil moisture and move to a warmer spot. Faded leaf colour: too much direct sun; shift to deeper shade. Stunted growth: underfeeding or rootbound pot; fertilise monthly and repot if needed.