A Guide to Growing Asparagus Fern Indoors

Asparagus Fern (Asparagus Densiflorus) is a popular garden plant known for its lush, feathery foliage and hardy nature. Easily grown indoors or outside, this fern provides an interesting addition to any garden.

The Asparagus Fern boasts delicate green leaves that resemble asparagus spears and create an airy feel in the landscape or in a container. It grows up to 60 cm tall and produces small white flowers during the summer months.

This low maintenance plant requires little attention but rewards with an attractive appearance all year round. It is important to note that while the Asparagus Fern often has ‘fern’ in its name, it is actually not a true fern at all! Rather, it belongs to the lily family which explains its striking resemblance to asparagus spears.

Asparagus Fern at a glance

Common Name Asparagus Fern
Scientific Name Asparagus Densiflorus
Growth Rate Average
Full maturity 2-3 years
Height (max) 60–90 cm
Width (max) 30–60 cm
Pet safe? Maybe
Sunlight Bright, indirect
Soil Ph 6.0–6.5 (slightly acidic)
Native to South Africa


How to grow Asparagus Fern

Growing Asparagus Fern indoors in Australia

Growing indoors in Australia is a great way to enjoy fresh, organic produce year-round. Asparagus Fern, also known as Asparagus Densiflorus, is an excellent choice for Aussie gardeners looking to grow indoors.

This resilient evergreen can be found throughout tropical and subtropical regions of the world and is an attractive addition to any home. Asparagus Fern prefers bright light but can tolerate shade and can reach heights of up to 1 metre when grown in ideal conditions.

It has dark green foliage with tiny white flowers that bloom from spring until late autumn. The plant’s frond-like stems are typically covered with small needle-like thorns so it should be placed away from traffic pathways. Given the right environment, Asparagus Fern will thrive indoors in Australia with little effort on the part of the gardener.

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Plant care

Quick care tips

When it comes to growing asparagus fern (Asparagus Densiflorus), proper care is essential for achieving stand-out results. As with any houseplant, regular attention and maintenance will ensure a well-rounded, healthy specimen.

Fortunately, caring for asparagus ferns is fairly straightforward and requires only minimal effort from the grower. Here are some quick tips to keep your asparagus fern in top condition – from choosing the right potting soil to harvesting the foliage at just the right time of year.

To get started on your asparagus fern journey, begin by selecting a lightweight potting mix with plenty of drainage capabilities – you don’t want your plant’s roots sitting in soggy soil!.

Asparagus Fern (Asparagus Densiflorus) Asparagus Fern (Asparagus Densiflorus) (Source)

Caring for your Asparagus Fern

Plant care is a key factor to consider when growing asparagus fern (Asparagus densiflorus). This bushy and lacy-looking houseplant is an easy-to-care-for addition to any indoor or outdoor space.

Asparagus ferns require minimal effort while giving off a delightful, airy look that can brighten any room or garden. To ensure your plant remains healthy and vibrant, here are some tips on providing the best care for your asparagus fern.

When choosing the right location for your asparagus fern, it is important to consider its needs for light, water and temperature. These plants thrive in indirect sunlight or partial shade but cannot tolerate direct sun exposure; temperatures should remain between 60°F and 75°F.

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Australian indoor plants guide


Light is essential to any successful garden. When it comes to growing asparagus fern (Asparagus densiflorus), there are certain factors that need to be taken into consideration in order for the plant to thrive.

The asparagus fern loves bright, indirect light, and can even tolerate some direct sun if filtered through a sheer window curtain or other means. It’s important not to place the plant in an area with full sun exposure because too much heat and light can damage its delicate fronds.

For optimal results, you should ensure that your asparagus fern receives at least 4 hours of diffused sunlight every day. You may also want to rotate your potted plants periodically so they receive equal amounts of light on all sides of the foliage. Regular exposure will encourage healthy growth and vibrant green colouration throughout the plant’s fronds and stems.

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Watering your Asparagus Fern


Water is an essential element to many living things, and asparagus fern (Asparagus Densiflorus) is no exception. This evergreen perennial requires proper watering for healthy growth and development.

The amount of water needed for asparagus fern will depend upon the environment in which it’s planted, including climate and soil type. In most cases, asparagus fern should be watered deeply once or twice a week during periods of active growth in order to keep the soil moist but not overly wet.

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If planted outdoors, ensure that Asparagus Densiflorus is receiving enough rainfall during dry months; otherwise it may require additional watering from a hose or sprinkler system. When indoors, Asparagus Densiflorus should be watered with room temperature water when the top 2–3 cm or two of soil feels dry to the touch.

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Fertiliser for Asparagus Fern


Fertiliser is an essential part of growing asparagus fern (Asparagus densiflorus). This popular foliage plant requires regular fertilisation to support healthy growth and vigorous blooms.

Fertiliser is necessary for providing the necessary nutrition to plants, allowing them to grow strong, lush leaves and a large root system. When planning how often and what type of fertiliser you will use on your asparagus fern, consider the age of your plant.

Younger plants are more fragile than mature ones so should be fed less frequently with a gentle formula. For adult plants, a balanced fertiliser with nitrogen, phosphorus, and potassium can be used every three months during their active growing season.

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Asparagus Fern Light


Temperature is an important factor for growing asparagus fern (Asparagus Densiflorus). This plant prefers temperatures of 65-75°F and can easily tolerate temperatures up to 80°F.

If grown in outdoor areas, the temperature should not be lower than 45°F. These plants also thrive in high humidity environments, but will do well in a controlled indoor environment with regular misting.

It’s important that the soil remains moist while raising asparagus ferns, so keep an eye on the temperature and water accordingly. During hot summer months it’s best to water more frequently, whereas during winter months water sparingly. If you’re growing your plant indoors keep away from direct heat sources like radiators and air conditioners which could affect temperature levels and adversely affect growth.

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Garden boot


Humidity is an important factor to consider when growing asparagus fern (Asparagus Densiflorus). This tropical plant originates from South Africa, where it enjoys high humidity levels.

To ensure optimal growth of your asparagus fern, you’ll want to keep the humidity level between 50-70%. Low relative humidity may cause the leaves to become dry and brittle.

High relative humidity on the other hand can lead to fungal diseases such as powdery mildew. To increase the humidity in your home environment, you can use a humidifier or place a shallow tray of water filled with pebbles near your plants. Alternatively, misting your plants daily is also a great way to keep their environment moist. With proper care and attention, these long lasting evergreens make for perfect indoor houseplants!.

Learn more about how humidity can affect indoor plants.

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Flowering is an important process for the growth of any plant, and the asparagus fern (Asparagus Densiflorus) is no different. This flowering evergreen shrub is native to South Africa and grows in a clumping form.

The delicate airy foliage creates an attractive texture in any garden setting. With its small white flowers that emerge in mid to late spring, it adds a dreamy effect to the landscape when they’re in bloom.

The asparagus fern requires minimal care but with proper attention and maintenance, will reward you with beautiful blooms every year. Exposure to full sun or partial shade will bring out the best results from this plant; however, too much sun can cause leaf scorching or drying out of soil if not properly hydrated.

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Pests and Asparagus Densiflorus


Pests can be a major problem for any gardener, especially when it comes to growing asparagus fern (Asparagus Densiflorus). This type of fern is quite susceptible to certain types of pests, including thrips and mealybugs.

If left unchecked, these pests can do serious damage to the fern’s leaves and stems. To prevent this from happening, gardeners should conduct regular inspections of the plants.

Look for small yellowish spots on the foliage or small insects scurrying around the base of the stems. If you spot anything suspicious, treat the infested areas with an insecticide immediately. In addition to treating your plants with an insecticide regularly, also keep them well-watered and fertilised to promote healthy growth and help build their natural defense mechanisms against pests.

Find out more about common indoor plant pests in Australia.

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Diseases are a common problem for any type of plant, and asparagus ferns (Asparagus densiflorus) are no exception. These hardy plants can suffer from a variety of issues, such as rust, blight, and root rot.

Rust is the most common problem with these ferns and is caused by fungi spores that settle on the leaves. This can be identified by small yellow or orange spots on the foliage.

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Blight is another disease that affects asparagus ferns, resulting in browning or wilting of the leaves and stems. Lastly, root rot may occur if too much moisture has been applied to the soil over time; this results in weak roots which will ultimately lead to leaf discolouring and wilting. Thankfully, these diseases can be treated easily with fungicides designed specifically for asparagus ferns.


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Soil is an essential component in growing any plant. Asparagus Fern, or Asparagus Densiflorus, is no exception and requires a well-draining soil with plenty of nutrients and organic matter.

When selecting the best soil for your asparagus fern, it’s important to choose one that offers good drainage as these plants thrive in moist soils but can easily be overrun by standing water. A high quality potting mix will usually provide a good balance of water retention and drainage for successful growth.

If needed, you can add some perlite or vermiculite to help improve drainage further. Additionally, adding a small amount of compost or worm castings into the potting mix will help ensure the necessary nutrients are available for healthy growth and strong root systems.

Learn how to lower your soil PH.

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Pot Size

Pot size

Asparagus fern, or Asparagus densiflorus, is a popular houseplant that has long been grown for its lush foliage and bright green colour. The plant can be easily propagated from cuttings and is often grown in containers as an ornamental feature on patios, balconies or indoors.

While many gardeners enjoy the look of this plant, one important factor to consider when growing it is pot size. When selecting a pot for asparagus ferns, larger pots are generally recommended to ensure healthy growth.

The ideal size should allow enough room for the roots to expand without becoming cramped and overcrowded. Larger pots also provide better soil drainage and aeration which will help keep the soil moist but not soggy.


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Pruning the Cast Iron Plant

Pruning your Asparagus Fern

Pruning is an essential step in maintaining the health and beauty of an asparagus fern (Asparagus densiflorus). Pruning helps to promote healthy growth, eliminate dead or diseased foliage, and maintain a neat appearance.

It is important to prune your asparagus fern regularly to ensure its health and optimal growth. When pruning your asparagus fern, use sharp shears or scissors and cut off faded leaves, damaged stems, and any dead or diseased foliage.

For a fuller look, you can also trim back long stems that have grown too large for the pot. Be careful not to remove too much foliage at once; removing more than one-third of the total foliage can damage the plant’s overall structure. After pruning is completed, it’s important to provide adequate moisture for proper healing.


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Propagating your Asparagus Fern

Propagation is an essential part of gardening and plant care. Growing Asparagus Fern (Asparagus Densiflorus) can be a fun and rewarding experience, with the help of propagation techniques.

Whether you are looking to expand your collection or simply maintain the health of your current plants, proper propagation methods are key. Propagating this type of fern can be relatively easy with a few simple steps.

The most successful way to propagate Asparagus Fern is through division. In late spring or early summer when the plant is actively growing, carefully dig up the plant and separate it into two central crowns with several shoots attached to each piece. Ensure that each separated piece has at least three healthy stems before replanting into soil that has been enriched with peat moss or composted manure.


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Garden fence

Is Asparagus Fern poisonous?

Are you interested in growing Asparagus Fern (Asparagus Densiflorus)? This attractive and easy to grow plant is a popular choice for both indoor and outdoor gardens. While an enjoyable addition to any landscape, it is important to understand the potential health risks associated with this species.

Asparagus Ferns are considered mildly toxic when ingested, so it’s important to be aware of the potential dangers before deciding whether or not this particular plant is right for your garden. The toxins in Asparagus Ferns can cause mouth irritation and abdominal pain if ingested.

In extreme cases, kidney failure can result from consuming parts of the plant. It’s especially important to keep children away from these plants as they may not be aware of their poisonous nature.

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