Kunth's hacksaw fern (Doodia kunthiana)

Also known as: Kunth's Rasp Fern

Kunth's hacksaw fern stands out with its striking transformation from vibrant red fronds to deep green as they mature. This adaptive growth suits the dappled light of forest environments. The fern's sturdy midrib supports its uniquely serrated leaf edges, which are crucial for capturing water droplets and maintaining stability in humid conditions.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting

Attributes of Kunth's hacksaw fern

Lifespan

Perennial

Plant Type

Fern

Plant Height

Up to 50 cm

Spread

Approximately 30 cm

Leaf Color

Red (young), Green (mature)

Flower Size

N/A (ferns do not produce flowers)

Flower Color

N/A (ferns do not produce flowers)

Images of Kunth's hacksaw fern

Quickly Identify Kunth's hacksaw fern

This fern can be identified by its distinctive fronds that start with a red or pinkish color when young and turn green as they mature. The fronds are pinnate with lance-shaped leaflets.

Scientific Classification of Kunth's hacksaw fern

Phylum

Vascular plants

Class

Ferns

Order

Polypodiales

Family

Chain fern

Genus

Hacksaw fern

Species

Kunth's hacksaw fern

Planting and Growing of Kunth's hacksaw fern

Care Difficulty

Moderate

Watering Schedule

Every 3 days

Sunlight Requirements

Partial sun

Sunshine Duration

6-10 hours

Ideal Temperature

60-75℉

Soil Type

Potting Mix, Peat Mix

Soil pH

6.5-7.5

Fertilizer Type

Balanced

Pruning Season

Spring, Summer

Pruning Area

Branches, Leaves

Pruning Frequency

2 times a year

Repotting Season

Spring

Pot Type

Plastic, Ceramic

How to Water Kunth's hacksaw fern?

For Doodia kunthiana, it's important to provide consistent moisture without waterlogging the soil. Ideally, you should water until the top 2 inches of soil are moist. This ensures adequate hydration while preventing root rot. Adjust the water amount based on your plant's size, with 250 ml being a general guideline for medium-sized specimens.

What are the symptoms of an underwatered Kunth's hacksaw fern? ›

What should I do if my Kunth's hacksaw fern is not getting enough water? ›

What are the symptoms of an overwatered Kunth's hacksaw fern? ›

How to save an overwatered Kunth's hacksaw fern? ›

What Are the Sunlight Requirements for Kunth's hacksaw fern?

Sunlight Requirements: Partial sun, Full shade

Duration of light: 2 to 6 hours

Partial sun to full shade is the ideal light range for Doodia kunthiana. Such conditions ensure robust growth and vibrancy, preventing leaf burn and encouraging lush foliage.

How much light does it need? ›

What if it's too sunny? ›

Does it benefit from occasional full sunlight? ›

What Is the Ideal Temperature Range for Kunth's hacksaw fern?

Ideal Temperature: 60 ~ 75℉

For the optimal growth of Doodia kunthiana, maintaining a consistent temperature range between 60°F and 75°F is crucial. This range mimics the plant's natural habitat, providing the warmth needed for healthy leaf development and robust root growth.

What Soil is Best for Kunth's hacksaw fern?

Soil type: Loam, Sandy loam

Soil PH: 6.5 ~ 7.5

Doodia kunthiana requires soil with excellent drainage to prevent root rot. This condition allows for adequate oxygen flow to the roots, promoting healthy growth and vibrant foliage. Soil rich in organic matter is crucial for Doodia kunthiana, providing essential nutrients for robust growth and resistance against diseases. While good drainage is vital, the soil should also retain enough moisture to keep the roots hydrated. This balance ensures steady growth, especially in drier conditions.

How to Fertilize Kunth's hacksaw fern?

Fertilizer type: Balanced

For Doodia kunthiana, the fertilizer amount should be moderate. Use a balanced, water-soluble liquid fertilizer diluted to half the recommended strength to avoid root burn. Approximately 15-20 ml of diluted fertilizer per plant is adequate. Too much fertilizer can stress the plant, while too little might hinder its growth.

How to Prune Kunth's hacksaw fern?

Pruning Time: Spring, Summer

Start by identifying dry, dead, or discolored fronds. These can usually be found at the base of the plant. Remove them by cutting as close to the base as possible without damaging the healthy parts of the plant. Trim back overgrown fronds to maintain the desired shape of the plant. This step helps to keep the fern looking tidy and controlled while also promoting a dense, lush appearance. After pruning, ensure that all cuttings are cleared away from the base of the plant to reduce the chance of diseases and pests which are often attracted to decaying plant material. More About Pruning Techniques→

How to Propagate Kunth's hacksaw fern plant?

Propagate Time: Early spring,Late spring

For division propagation, choose a time in early to late spring when the plant shows new growth. This ensures that the separated sections establish well with the helping of favorable weather conditions.

Examine the plant's root ball and use your spade or knife to separate healthy sections of the plant, ensuring each has sufficient roots and leaves for independent growth. Handle roots with care to minimize damage.

For spore propagation, dust the collected spores over a tray filled with moist, sterilized compost and cover with clear plastic to maintain humidity. Place in a warm and light spot, but avoid direct sunlight.

More About Propagating Techniques→

How to Repot Kunth's hacksaw fern plant?

Repotting frequency: Every 2-3 years

Doodia kunthiana requires repotting when you see roots emerging from the drainage holes or when growth becomes stunted. The optimal time to repot is during its growth phases in spring or autumn. This is when the plant can best recover from the stress of repotting and quickly establish itself in fresh soil.

Select a pot that is just one size larger than the current one, ideally with good drainage holes. A pot that is too large can lead to overwatering and waterlogging, which this plant's roots are sensitive to. A well-fitting pot helps maintain optimal moisture levels and supports healthy root growth.

Use a well-draining, loamy soil mix to prevent root rot and provide adequate aeration. Incorporating peat or bark can enhance drainage. The ideal soil retains enough moisture for the plant's needs but dries out swiftly enough to prevent sogginess, promoting robust and healthy growth.