How to grow ferns

How to grow ferns

Choose the right spot for your fern, ensuring you have a shade-loving fern for a shady spot and a sun-loving fern for a sunny location. Most ferns thrive in a moist but well-drained, alkaline soil, although others prefer an acidic medium. Remove dead or damaged fronds from perennial ferns in spring.

More on growing ferns:

• How to grow tree ferns
• 10 ferns to grow
• How to plant ferns in dry shade
• Iris, ivy and fern pot display
• Hosta and fern pot display

Where to plant ferns

Before planting, ensure you have the right fern for your garden or home. It's often wrongly assumed that all ferns need shade and a moist soil. There's a huge range of ferns to grow, ranging in height, colour and habitat.

Grow Dryopteris affinis or Osmunda regalis in a sunny spot. For shade choose Dryopteris filix-mas or Polystichum rigens. Tree ferns (perennial ferns with woody trunks) will thrive only in a very sheltered position. Try Matteuccia struthiopteris or Osmunda regalis for a bog garden. The majority of ferns prefer an alkaline or neutral soil but blechnum species do best in an acid soil.

Ferns as houseplants

If you’re looking for a house plants or terrarium specimens go for Asplenium nidus, Adiantum monocolor or Blechnum gibbum. Ferns grown in the house must be kept away from drying radiators or open fires. Avoid direct sunlight.

How to plant ferns

Plant ferns between May and September, ideally in humus-rich, well-drained but moist soil. Add leaf mould to the planting hole if you can – manure and compost can be too rich for them. When planting, avoid covering the crown of the fern with soil as this can rot.

Watch Monty Don's video guide to growing ferns in dry shade:

How to care for ferns

Ferns require very little care. Remove any dead or damaged fronds in May from evergreen ferns. The fronds of deciduous ferns can be cut back in autumn. Mulch annually in autumn or spring with home-made leaf mould.

Watch this short video featuring Steven Fletcher of Fernatix, on the three Golden Rules of growing ferns:

How to propagate ferns

Ferns don’t produce flowers or seed. Instead they produce spores on the underside of their fronds. Growing new plants from spores can take up to two years. This is a specialist propagation method for very keen gardeners.

Some ferns, such as Asplenium bulbiferum, produce bulbils. These have small fronds emerging from them so are easy to spot on the parent frond. To propagate more plants from the bulbils, remove a bulbil-laden frond. Put some seed compost in a seed tray and water. Pin the frond flat onto the compost with small hooks of garden wire. Put the whole seed tray in a clear plastic bag and seal the end. Leave the seed tray in a light and warm place and look out for signs that the bulbils have rooted. Once rooted, carefully lift out the new ferns and pull them away from the parent frond. Pot them on and keep moist.

Growing ferns: problem solving

Ferns are trouble-free and rarely affected by pests and diseases.

Ferns to grow

• Osmunda regalis – an elegant deciduous fern that enjoys sun or shade but needs a wet soil. Reaches 160cm
• Asplenium nidus – an evergreen fern that’s a popular houseplant. Ideal for a north-facing windowsill. Reaches a height of 60cm
• Asplenium scolopendrium (pictured) - a tough, evergreen fern that's often found growing wild. 30cm
• Adiantum aleuticum ‘Imbricatum’ – a delicate looking fern that is very hardy. Enjoys a shady spot in the garden. Reaches 30cm
• Blechnum spicant – requires a lime-free soil. An elegant, hardy fern that reaches 45cm in height
• Matteuccia struthiopteris – dramatic foliage reaching 160cm. A deciduous fern that spreads well by rhizomes
• Dicksonia antarctica - the tree fern. The crown needs protection over winter in cold areas