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How to Grow Mother Spleenwort

Mother Spleenwort

Asplenium bulbiferum

herb

Mother Spleenwort is a delicate, feathery fern native to New Zealand and Australia, prized for its lacy, finely divided fronds and ability to produce tiny bulbils (baby plantlets) along the frond midribs. These bulbils naturally detach and can be propagated to create new plants, making it an excellent choice for indoor gardeners interested in plant reproduction. It's a tender, evergreen fern that thrives in humid indoor environments.

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Example Mother Spleenwort timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Mother Spleenwort

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Mother Spleenwort

    Late summer into fall

    Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Mother Spleenwort dates for your own zip code.

Growing Conditions

☀️
Sun: Bright, indirect light; 12,000-20,000 lux; avoid direct sun which burns fronds
💧
Water: Keep soil consistently moist but not waterlogged; prefers high humidity (60-80%); mist fronds regularly or use a pebble tray; reduce watering slightly in winter
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Spacing: 12-18 inches
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Days to maturity: Varies by propagation method; established plants grow year-round
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Planting depth: Shallow planting; rhizome should sit at soil surface level

Soil

Type: Well-draining, light, airy potting mix
pH: 6.0-7.0
Amendments:
Peat moss or coco coir Perlite or bark chips Orchid bark Compost for moisture retention

Growing Zones

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Zones 10b-11; grown indoors in cooler regions

10b 11

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Growth Stages

1

Establishment

4-8 weeks

Newly propagated bulbils or young potted plants develop initial frond growth and root system

Maintain high humidity (75-80%) in a propagation chamber or covered container; keep soil lightly moist; provide bright indirect light; avoid handling delicate new growth

2

Vegetative Growth

2-6 months

Fronds gradually unfurl and expand, reaching mature feathery, lacy appearance with pinnately divided leaflets

Maintain consistent moisture and humidity; ensure bright indirect light; fertilize monthly with diluted liquid fern fertilizer or balanced low-nitrogen formula; support fronds gently as they emerge

3

Bulbil Production

Ongoing with mature plants

Mature fronds develop tiny bulbils (plantlets) along the midrib, appearing as small green bumps that darken as they mature

Maintain optimal humidity and moisture; do not remove bulbils until they develop small roots (visible as tiny whitish protrusions); fertilize lightly to support energy for bulbil development

4

Frond Maturation

4-12 weeks per frond

Fronds reach full size and unfurl completely, displaying the characteristic delicate, finely divided texture

Continue regular misting and consistent watering; remove any brown or damaged frond tips with clean scissors; provide adequate air circulation to prevent fungal issues

5

Harvest/Propagation

Ongoing propagation possible year-round

Mature bulbils are carefully harvested and placed on moist substrate to root and form new plantlets

Allow bulbils to remain on mother plant until they show small roots; gently detach with tweezers; place on moist sphagnum moss or fern potting mix; maintain high humidity for rooting; do not water directly on young bulbils

Companion Planting

Plan your garden →

Plant with:

Maidenhair Fern Bird's Nest Fern African Violet Begonia Peperomia Prayer Plant

Avoid planting near:

Cacti Succulents Dry-loving plants Plants requiring low humidity

Common Pests

  • Increase humidity; mist foliage regularly; spray with neem oil or horticultural soap; isolate affected plants

  • Remove with alcohol-dampened cotton swab; spray with insecticidal soap; repeat every 7-10 days as needed

  • Hand-remove with soft cloth; apply neem oil spray; treat every 2 weeks until clear

  • Increase air circulation; yellow sticky traps; spray with insecticidal soap or neem oil

  • Allow soil surface to dry slightly between waterings; use yellow sticky traps; apply sand layer on top of soil; use Bti (Bacillus thuringiensis israelensis)

Uses

🏠

Indoor Tropical Decor

Household

Mother Spleenwort's delicate, feathery fronds add elegant, lush greenery to indoor spaces, terrariums, and Wardian cases. Its compact size and graceful appearance make it ideal for shelving, hanging baskets, or plant stands in humid locations like bathrooms. [source]

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Natural Propagation Display

Household

This fern is uniquely fascinating for watching bulbil development and propagation, making it an educational and interactive houseplant. Observing the life cycle from bulbil formation to rooted plantlets offers insight into fern reproduction. [source]

🎨

Terrarium and Vivarium Plant

Craft

Mother Spleenwort thrives in closed or humid terrariums and is popular in reptile vivariums where humidity levels naturally remain high. Its small, delicate fronds work well in miniature landscape designs. [source]

🦋

Habitat for Invertebrates

Wildlife

The dense, feathery fronds provide shelter and microhabitat for small invertebrates in terrariums and botanical collections, supporting balanced ecosystems. [source]

💊

Traditional Spleenwort Uses

Medicinal

Historically, ferns in the Asplenium genus were used in traditional herbal medicine for spleen and lymphatic health, though modern scientific evidence is limited. The name 'Spleenwort' reflects this historical folk remedy association. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Propagation occurs naturally when mature bulbils develop small root structures (visible as pale projections). Carefully detach fully-rooted or near-rooted bulbils from the frond midrib using clean tweezers. Place them onto moist sphagnum moss, fern potting mix, or a propagation medium, keeping humidity extremely high (use a clear plastic dome or bag). Bulbils typically root within 2-4 weeks. Do not harvest fronds for cutting; instead, allow the plant to naturally shed mature fronds or remove only those showing decline.

Fun Facts

  • 🌱 Mother Spleenwort earned its common name because of its remarkable ability to produce tiny bulbils along its fronds that naturally drop off and grow into new plants—essentially creating 'baby' plantlets without requiring sexual reproduction or spores.
  • 🌱 The scientific name 'bulbiferum' literally means 'bulb-bearing,' referring to these unique bulbils that develop along the fronds, making it one of the easiest ferns to propagate for beginners.
  • 🌱 This fern is native to the temperate rainforests of New Zealand and Australia, where it naturally grows as an epiphyte (on trees) and thrives in the consistently moist, humid environment—conditions indoor gardeners can easily replicate.

Gardening Terms

New to gardening? Learn about terms used in this guide:

pH
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