How to Care for Cape Sundew Plant?

Cape Sundew (3)

As a houseplant enthusiast, there is an undying thrill that stems from the ability to add unique charm to your indoor garden. One plant that lends an exotic, beguiling touch to your plant family is the Cape Sundew, a fascinating carnivorous houseplant with a penchant for a bit of drama.

The Cape Sundew, or Drosera capensis, is a wondrous plant known for its vibrant, dew-kissed leaves and its intriguing method of capturing prey. Yes, you heard right! This plant indulges in a rather unusual diet. But don’t let its carnivorous nature deter you; the Cape Sundew is relatively easy to care for, with propagation primarily through leaf cuttings or seeds. Also, here is a detailed article on how to propagate Cape Sundew Plant

Care Basics Of Cape Sundew

Care RequirementDetailsDifficulty
LightFull Sun to Partial ShadeEasy
WaterDistilled, Rain, or Reverse Osmosis Water OnlyModerate
Temperature70-80°F (21-27°C)Easy
Soil pH4.5-6.0Easy
Soil TypeSphagnum Peat Moss & PerliteEasy
FertilizerVery Little to NoneEasy
PruningRemove Dead Traps/FlowersEasy
Growth PeriodYear-Round, Dormancy in Cooler MonthsEasy
PropagationLeaf Cuttings or SeedsModerate
SuppliesDistilled Water, Peat Moss, Perlite, Plastic PotEasy

Light Requirements

Cape Sundews are sun-loving plants, that require good light exposure to thrive. However, they are somewhat adaptable and can cope with less-than-ideal light conditions.

A. Light Requirements for Cape Sundews

Full sun to partial shade is the ideal lighting condition for Cape Sundews. They relish the morning sun, which enables them to produce the glistening dew they’re known for. This ‘dew’ is crucial for their insect-catching exploits. The right balance of light also promotes healthier leaf growth and the distinctive reddish tint on their tentacles.

Cape Sundew (2)

B. Types of Light Exposure

Cape Sundews are quite flexible in terms of light exposure. They can manage in the following types of light conditions:

  1. Full Sun: This refers to six or more hours of direct sunlight each day, usually experienced in an outdoor setting. However, when kept indoors, providing a similar environment might require placing them near a south-facing window or under suitable artificial lights.
  2. Partial Shade: This typically means the plant gets 3-6 hours of sun per day, preferably during the cooler hours of the morning. An east or west-facing window can provide this light condition.
  3. Bright Indirect Light: Although not ideal, Cape Sundews can also survive under bright indirect light. This means the sunlight does not directly hit the plant but is reflected off other surfaces.

C. How to Provide Proper Light to Cape Sundews

Place your Cape Sundew near a south, east, or west-facing window that receives plenty of sunlight. If the sunlight is too intense, you might need to diffuse it with a sheer curtain to avoid leaf burn. If adequate natural light is not possible, you can provide artificial light using fluorescent tubes or LED grow lights, which should be placed a few inches above the plant to mimic the intensity of natural sunlight.

Planting Techniques

Successfully growing Cape Sundews is much about understanding their natural habitat and mimicking those conditions.

A. How to Plant Cape Sundews

Start by preparing a suitable potting mix – a blend of sphagnum peat moss and perlite (50:50) is perfect. This mix retains enough moisture and allows for excellent drainage.

Planting can be done using seeds or leaf cuttings. For seeds, simply sprinkle them on the surface of the damp potting mix and keep the soil consistently moist until they sprout. For leaf cuttings, place a fresh leaf onto the surface of your potting mix. It’s important to keep the leaf cutting moist and warm, covered with a plastic wrap or bag until new growth appears.

B. Location for Planting Cape Sundews

Select a location that receives plenty of sunlight. Near a south, east, or west-facing window is ideal. If you’re using artificial light, place the plant a few inches below the light source. Remember, the location should also maintain a consistent temperature of 70-80°F (21-27°C) for optimal growth.

Also, remember that Cape Sundews require high humidity, so if you’re living in a dry climate, consider using a humidity tray or a small humidifier near your plant.

Lastly, it’s essential to remember that as carnivorous plants, Cape Sundews need to capture insects for nutrients. So, avoid locations where they cannot fulfill this aspect of their diet, such as a room without any insect activity or outdoors if you live in an area without enough insect life.

Cape Sundew


Cape Sundew’s watering needs are relatively simple, yet fundamental. They thrive in constantly moist soil, reflecting their natural habitat in the marshy areas of South Africa. However, they can be sensitive to the type of water and the way it’s administered.

A. Water Requirements

Cape Sundews require consistent moisture, but the quality of the water is a critical factor to consider. They are highly sensitive to minerals commonly found in tap water, which can overwhelm their root systems and cause damage. Instead, use distilled, rain, or reverse osmosis water. These types of water are free from added minerals and will not harm the plant.

B. How Often to Water

The goal is to keep the soil consistently damp but not waterlogged. Depending on your home’s temperature and humidity, this could mean watering your Cape Sundew every few days. Rather than sticking to a strict watering schedule, aim to maintain an environment where the soil is constantly damp.

C. Signs of Overwatering and Under-Watering

Overwatering: When Cape Sundews receive too much water, the soil becomes waterlogged, leading to root rot. Signs of overwatering may include yellowing leaves, a wilted appearance despite damp soil, or a noticeable stench from rotting roots.

Under-watering: If your Cape Sundew isn’t getting enough water, you may notice that it stops producing the dewy droplets it’s known for. The leaves may also appear shriveled or dry.

D. Tips for Proper Watering Techniques

To provide the best watering conditions, use the ‘tray method.’ This involves placing the pot in a tray filled with about an inch of water. This allows the plant to absorb water from the bottom, reducing the risk of root rot associated with overhead watering. It’s crucial to change the water in the tray regularly to prevent stagnation.

Soil and Fertilization

The soil and fertilizer requirements of the Cape Sundew are also crucial aspects of its care.

A. Soil Requirements for Cape Sundews

Cape Sundews prefer an acidic soil environment. A mix of sphagnum peat moss and perlite (50:50 ratio) works well. This mixture mimics the plant’s natural substrate, providing the necessary moisture retention and excellent drainage.

B. Importance of Proper Soil Drainage

While Cape Sundews like moist conditions, they don’t appreciate waterlogged soil. Proper soil drainage is vital to prevent root rot, a common issue that can quickly kill your plant. A combination of peat moss and perlite not only retains the right amount of moisture but also allows excess water to drain away effectively.

C. Fertilization Requirements and Tips for Proper Fertilizer

Cape Sundews get most of their nutrients from their insect prey, not from the soil. Therefore, they don’t need much, if any, additional fertilizer. It’s important not to over-fertilize, as this can harm the plant. If you feel your plant needs a nutrient boost, consider a very diluted solution of orchid or carnivorous plant fertilizer applied sparingly.

Temperature and Humidity

Cape Sundew (4)

Cape Sundews, being native to the diverse climate of South Africa, can adapt to a broad range of temperatures and humidity levels. That said, providing optimal conditions will help your plant thrive.

A. Optimal Temperature Range for Cape Sundews

The ideal temperature range for Cape Sundews is between 70-80°F (21-27°C). These temperatures mimic the climate of their native habitat, supporting their growth and dew production. However, they can tolerate temperatures as low as 40°F (5°C) and as high as 95°F (35°C), as long as they are not prolonged.

B. Humidity Requirements

Cape Sundews love a good dose of humidity. They thrive in conditions with 40-70% humidity, which helps them produce their characteristic dew. In regions with less humidity, these plants can struggle to create their dewy secretions, which are essential for catching prey.

C. How to Adjust Temperature and Humidity for Optimal Growth

To maintain the optimal temperature, consider the location of your plant. If you live in a region with extreme temperatures, it may be best to keep your Cape Sundew indoors, where the temperature can be more easily regulated.

Pests and Diseases

While Cape Sundews are fairly hardy, they can still fall victim to pests and diseases. Here are a few common issues and how to handle them.

A. Common Pests and Diseases

  1. Fungus Gnats: These tiny insects are often attracted to the moist environments that Cape Sundews love. The larvae feed on plant roots and can cause damage over time.
  2. Aphids: Aphids can sometimes infest Cape Sundews, sucking the sap from their leaves and causing wilting or yellowing.
  3. Root Rot: This disease is usually a result of overwatering and poor drainage. Signs include wilting, yellowing leaves, and a rotten smell.

B. Prevention and Treatment Methods

  1. Fungus Gnats: Regularly inspect your plant’s soil for signs of these pests. If present, allow the top layer of soil to dry out between waterings, as fungus gnats thrive in wet soil. You can also use yellow sticky traps to catch the adult gnats.
  2. Aphids: Keep an eye on your plant for any signs of aphids, such as a sticky residue on the leaves or nearby surfaces. If you spot aphids, you can typically remove them with a strong stream of water or by wiping the leaves with a cloth soaked in a solution of water and a few drops of dish soap.
  3. Root Rot: The best cure for root rot is prevention. Ensure your Cape Sundew has well-draining soil and avoid overwatering. If your plant does contract root rot, you’ll need to remove it from the soil, cut away any affected roots, and repot it in fresh, well-draining soil.


Pruning is a part of plant care that not only helps in maintaining your Cape Sundew’s shape and size but also promotes its overall health.

Cape Sundew (1)

A. Reasons for Pruning Cape Sundews

  1. Removing Dead or Dying Leaves: As with any plant, the Cape Sundew will naturally have leaves that die off. Removing these leaves can help redirect the plant’s energy to the healthy parts.
  2. Controlling Size: While Cape Sundews are relatively small plants, pruning can help maintain a particular size or shape if desired.
  3. Disease Control: If your Cape Sundew is affected by a disease or pest, removing the affected parts can prevent the problem from spreading to the rest of the plant.

B. How to Prune Cape Sundews

Pruning a Cape Sundew is a straightforward process. Using a clean, sharp pair of scissors or pruners, simply cut away the leaf or stem that you wish to remove, as close to the base as possible. Always be sure to clean your pruning tools before and after use to prevent the spread of any diseases.

Recommended Varieties

Several varieties of Cape Sundew are recommended for cultivation:

  1. Drosera capensis “Alba”: This variety stands out for its white flowers and all-green leaves. It’s an excellent choice if you prefer a subtler appearance.
  2. Drosera capensis “Wide Leaf”: As the name suggests, this variety boasts wider leaves than the typical Cape Sundew, making it a robust addition to any carnivorous plant collection.
  3. Drosera capensis “Red”: This variety features a striking red coloration, providing a vibrant pop of color.
  4. Drosera capensis “Narrow Leaf”: With its thin, elongated leaves, this variety offers a delicate, unique aesthetic.

Common Problems

Growing Cape Sundews can be a delightful journey, but like any plant, it can come with its own set of challenges. Some common issues include:

  1. Lack of Dew: If your Cape Sundew isn’t producing its characteristic dew, it could be due to inadequate lighting or humidity, or using the wrong type of water (high mineral content).
  2. Wilting or Yellowing Leaves: These symptoms often indicate overwatering and possible root rot.
  3. Small, Weak Leaves: If your plant’s leaves appear small or weak, it could be due to insufficient lighting.
  4. Pests: Although Cape Sundews are carnivorous plants, they can still fall prey to pests like aphids or fungus gnats.
  5. Difficulty Flowering: If your Cape Sundew is not flowering, it may not be receiving enough light, or it may be in a location with temperatures outside its preferred range.

Tips for Better Care

Even though Cape Sundews are relatively easy to care for, there are a few tips that can help you in ensuring the plant thrives in your care.

Basic Level Tips

  1. Water Quality: Always use distilled, rain, or reverse osmosis water. Tap water often contains minerals that can harm Cape Sundews.
  2. Consistent Moisture: Keep the soil constantly damp using the tray watering method, which allows the plant to soak up water as needed.
  3. Lighting: Provide bright but indirect light to ensure your Cape Sundew stays healthy and produces plenty of dew.

Advanced Level Tips

  1. Feeding: While not required, feeding your Cape Sundew small insects can help it thrive, especially if it doesn’t have access to much natural prey.
  2. Humidity: If you live in a dry area, use a pebble tray or a room humidifier to increase the humidity around your plant.
  3. Temperature Control: Although Cape Sundews can tolerate a range of temperatures, they prefer conditions between 70-80°F (21-27°C). Avoid sudden temperature changes.
Cape Sundew (5)

Frequently Asked Questions

Why is my Cape Sundew not producing any dew?

If your Cape Sundew isn’t producing dew, it could be due to inadequate lighting, low humidity, or the use of tap water containing minerals. Correcting these factors should help your plant start producing dew again.

Why are the leaves of my Cape Sundew turning yellow?

Yellowing leaves are often a sign of overwatering and possible root rot. Reduce your watering frequency and ensure that your plant has well-draining soil.

How often should I feed my Cape Sundew insects?

Cape Sundews can get most of their nutrients from the insects they catch themselves. If your plant is indoors and doesn’t have access to much natural prey, you can feed it small insects every 2-3 weeks.

Can Cape Sundews grow indoors?

Absolutely! Cape Sundews can make great indoor plants. Just ensure they receive plenty of bright, indirect light, and maintain the right temperature and humidity levels.

What should I do if my Cape Sundew has pests?

Even though they are carnivorous, Cape Sundews can still have pest problems. Most pests can be dealt with by rinsing the plant with a strong stream of water or wiping the leaves with a cloth soaked in a solution of water and a few drops of dish soap.

About Christopher Evans

Hello, I'm Chris, the green-thumbed Founder of I'm passionate about bringing the beauty of nature indoors through houseplants and indoor gardening. Let's create healthier and more beautiful living spaces, one plant at a time!

View all posts by Christopher Evans →

Leave a Reply

Your email address will not be published. Required fields are marked *