How to grow holly fern
Overview
Holly fern (Cyrtomium falcatum) is a clump-forming evergreen fern with glossy, dark green, holly-like fronds. It is grown for its attractive foliage and ability to fill shaded gaps in the garden, thriving in dry shade once established.
Soil Preparation
Prefers well-drained, slightly acidic to neutral soil (pH 6.0–7.0). Enrich with compost or well-rotted manure before planting. Avoid heavy clay; improve drainage with sand or grit if needed.
Growing Guide
Plant holly fern in a sheltered, part-shaded position with protection from harsh afternoon sun, such as under a tree or on a south-facing wall. Space plants 40–50 cm apart in well-drained soil enriched with organic matter. Water regularly until established, then reduce to occasional deep watering. Mulch well to retain moisture and suppress weeds.
Care
Feed with a balanced liquid fertiliser every 4–6 weeks during spring and summer. Remove old or damaged fronds at the base to encourage fresh growth and maintain a tidy appearance. No pruning needed beyond cleanup.
Companion Planting
Good companions include clivia, mondo grass, and other shade-tolerant plants like hostas and ferns. Avoid planting near aggressive spreaders such as running bamboo or large grasses that may outcompete.
Common Pests & Risks
Scale insects and snails are the main pests. Scale appears as small brown bumps on fronds; treat with horticultural oil or soap spray. Snails can be controlled with iron-based baits or by hand-picking at night.
Troubleshooting
Yellow fronds: usually overwatering or poor drainage – reduce water and improve soil. Brown frond tips: dry air or underwatering – increase humidity or water more. Stunted growth: lack of light – move to brighter spot. Scale: treat with oil spray. Snails: use bait or hand-pick.