How to grow boston fern climber
Overview
Boston fern climber (Lygodium japonicum) is a climbing fern, not a true Boston fern. It is grown to soften vertical structures, cover trellises, and add lush height to shaded gardens. It requires consistent moisture and protection from harsh sun to thrive.
Soil Preparation
Prefers a rich, loamy soil with high organic matter, slightly acidic to neutral pH (5.5–7.0). Amend with compost or peat moss to improve moisture retention. Ensure good drainage to prevent root rot.
Growing Guide
Plant in a sheltered position with bright, indirect light and protection from hot afternoon sun. Use a rich, well-draining soil mix with high organic matter, and keep consistently moist. Space plants 30–50 cm apart near a support like a trellis or moss pole. In cooler zones, wait until after the last frost to plant out. Mulch heavily to retain moisture and suppress weeds.
Care
Feed monthly during spring and summer with a balanced liquid fertiliser at half strength. Prune out dead or damaged fronds in early spring to encourage new growth. Train new tendrils onto supports as they emerge to keep the plant tidy and climbing.
Companion Planting
Good companions include other moisture-loving ferns like Nephrolepis cordifolia and Adiantum species, as well as shade-tolerant plants such as hostas and ligularia. Avoid planting near plants that require dry conditions or full sun, as they will compete poorly.
Common Pests & Risks
Scale insects can appear on fronds; treat with horticultural oil or soap spray. Spider mites may occur in dry conditions; increase humidity and mist regularly. Drying fronds often indicate low humidity or underwatering.
Troubleshooting
Yellowing fronds: often from too much direct sun or inconsistent watering. Move to shadier spot and water regularly. Brown frond tips: low humidity or dry air; increase misting or place on a humidity tray. Stunted growth: lack of nutrients or support; feed monthly and provide a climbing structure. Scale on stems: treat with neem oil or insecticidal soap. Fronds not climbing: tendrils need training; gently guide new growth onto support.