Senecio mandraliscae ‘Blue Chalk Sticks’: A Comprehensive Succulent Care Guide

If you’re a plant lover like me, you’ll love Senecio mandraliscae, or as it’s more commonly known, ‘Blue Chalk Sticks.’ This unique succulent is a visual treat with its stunning blue-green foliage and easy-to-care-for nature. In this guide, we’ll delve into everything you need to know about taking care of this beautiful plant.

Blue chalk sticks feature senecio mandraliscae

Introduction to Senecio mandraliscae ‘Blue Chalk Sticks’ 

Senecio mandraliscae, or ‘Blue Chalk Sticks,’ is a spreading succulent native to South Africa. Due to its signature blue-green, finger-like leaves and easy-going nature, it’s a popular choice for succulent enthusiasts around the globe.

Blue chalk sticks native habitat senecio mandraliscae

Understanding the ‘Blue Chalk Sticks’ 

The Plant’s Appearance 

Senecio mandraliscae ‘Blue Chalk Sticks’ succulent stands out with its cylindrical, chalk-like leaves that give the plant its name. Its blue-green hue, which can intensify under full sun, adds a striking contrast to traditional green foliage.

Senecio mandraliscae by balcone fiorito ig senecio mandraliscae
source: @balcone.fiorito on Instagram

Ideal Growing Conditions 

Like most succulents, Senecio mandraliscae ‘Blue Chalk Sticks’ loves bright sunlight and well-draining soil. It’s also a drought-tolerant plant, making it an excellent choice for those who are new to plant care. Dig a little deeper into the tips and tricks to care for this blue beauty below.

Easy Steps to Care for Your Senecio mandraliscae ‘Blue Chalk Sticks’ 

Now that you’ve got a basic understanding of Senecio mandraliscae ‘Blue Chalk Sticks’ plant, let’s talk about how to care for it.

Senecio mandraliscae by takashimaen ig senecio mandraliscae
source: @takashimaen on Instagram

Sunlight Requirements 

Senecio mandraliscae loves bright sunlight. If you’re growing it indoors, place it near a south-facing window where it gets plenty of light. If the plant is outdoors, it can tolerate full sun but appreciates some shade during the hottest part of the day.

How to water blue chalk sticks senecio mandraliscae

Watering Your Senecio mandraliscae ‘Blue Chalk Sticks’ 

Senecio mandraliscae ‘Blue Chalk Sticks’ is a drought-tolerant plant. This means you should let the soil dry out between waterings. Overwatering can lead to root rot, a common issue with succulents.

However, when you do water, make sure you water thoroughly enough so that water runs out of the drainage holes in the bottom of the pot. This encourages healthy root growth and flushes any excess buildup of mineral salts in the soil.

Senecio mandraliscae by cactijordan ig senecio mandraliscae
Source: @cactijordan on instagram


The active growing season during cooler months is the best time to fertilize Senecio mandraliscae ‘Blue Chalk Sticks.’ Use a balanced, water-soluble fertilizer diluted to half strength. Fertilizing should be done about once a month during the growing season. Avoid fertilizing during the summer dormancy period.

The Right Soil 

Senecio mandraliscae ‘Blue Chalk Sticks’ thrives in well-draining soil. A mixture of cactus potting soil and perlite or any other inorganic substrate is an excellent choice.

Soil for blue chalk sticks senecio mandraliscae

Temperature and Humidity 

Senecio mandraliscae ‘Blue Chalk Sticks’ plant prefers a warmer climate and can tolerate temperatures as low as 30°F (-1°C). It doesn’t require high humidity levels, making it a great indoor plant as long as you can give it enough light. It truly is a phenomenal landscape succulent, but not so great in pots indoors. If temperatures in your area drop below freezing, consider bringing your plant indoors or providing it with some form of frost protection.

Potential Problems with Senecio mandraliscae ‘Blue Chalk Sticks’

Common Pests 

Like any plant, Senecio mandraliscae ‘Blue Chalk Sticks’ can attract pests like mealybugs and aphids. Regularly check your plant for any signs of infestation.


The most common disease that affects Senecio mandraliscae is root rot, typically caused by overwatering. Ensure your plant is in well-draining soil and that you’re not overwatering it.


Senecio mandraliscae ‘Blue Chalk Sticks’ is considered toxic to humans and pets. Some key points about its toxicity:

  • It contains pyrrolizidine alkaloids, which are toxic compounds that can cause liver damage or failure if ingested. All parts of the plant contain these alkaloids.
  • Ingesting even small amounts can be dangerous over time. The toxins accumulate in the body.
  • Symptoms of poisoning can include appetite loss, vomiting, jaundice, liver failure.
  • The plant is especially toxic to livestock like horses and cattle. But pets and humans are also at risk if they ingest parts of the plant.
  • Contact with the plant juices may also cause skin irritation in some individuals.

So special care should be taken if growing Senecio mandraliscae in a home with pets or small children who may try to put plant parts in their mouth. It’s best to keep this plant out of reach and potentially replace it with a non-toxic succulent. Consulting a doctor quickly is advised if poisoning is suspected.

Signs of an Unhealthy Senecio mandraliscae ‘Blue Chalk Sticks’ Plant

Identifying early signs of an unhealthy plant is essential in preventing further damage. Here are some common signs that your Senecio mandraliscae or ‘Blue Chalk Sticks’ plant might be unhealthy:

Yellowing or Browning Leaves

If the leaves of your Senecio mandraliscae ‘Blue Chalk Sticks’ succulent start to yellow or brown, this could be a sign of overwatering. Remember, as a succulent, this plant prefers its soil to dry out completely between waterings.

Wilting or Droopy Leaves

Wilting or droopy leaves can be another sign of overwatering or underwatering. It’s important to strike a balance when watering your ‘Blue Chalk Sticks.’

Soft, Mushy Leaves

Soft, mushy leaves are a notable sign of overwatering and potential root rot. If the leaves feel squishy and discolored, it’s possible that your plant has been overwatered.

Sparse Growth or Leggy Appearance

If your Senecio mandraliscae ‘Blue Chalk Sticks’ plant is not producing new leaves or if the leaves are spaced far apart on a stretched-out stem (a condition known as etiolation), it might not be getting enough light.

Pests blue chalk sticks senecio mandraliscae


Common pests that can affect Senecio mandraliscae ‘Blue Chalk Sticks’ plant include mealybugs and aphids. They are typically visible to the naked eye and can cause damage to the plant, such as discolored or damaged leaves and slowed plant growth.

By recognizing these signs early, you can adjust your care routine as needed and help your ‘Blue Chalk Sticks’ plant thrive.

How to propagate blue chalk sticks senecio mandraliscae

Propagating Your ‘Blue Chalk Sticks’ 

One of the joys of owning ‘Blue Chalk Sticks’ succulent is how easy it is to propagate. You can create an entirely new plant from just a single stem cutting.

Stem Cuttings 

To propagate Senecio mandraliscae ‘Blue Chalk Sticks’ from stem cuttings, cut a piece of the stem and allow it to dry for a few days. Then, place it on well-draining soil and wait for roots to develop.

Dormancy Period and Care for Senecio mandraliscae ‘Blue Chalk Sticks’

Many Senecio species, including Senecio mandraliscae or ‘Blue Chalk Sticks,’ have a unique growth cycle and are summer dormant, growing more actively in cooler weather. Here’s the corrected care guide for its dormancy period.

Summer Dormancy

During the hot summer months, Senecio mandraliscae ‘Blue Chalk Sticks’ enters a period of dormancy. This is a survival mechanism to cope with the intense heat and dry conditions of its native habitat in South Africa. During this time, the plant’s growth slows significantly, and it needs less care than during the active growing season, which typically occurs in cooler weather.


Because it’s summer dormant, ‘Blue Chalk Sticks’ requires less water during this period of slowed growth as it may cause root rot. The plant conserves its resources to survive the hot, dry summer. Therefore, you should reduce your watering frequency. As always, check the soil before watering; it should be completely dry before you water it again.


Even during its dormancy, ‘Blue Chalk Sticks’ will appreciate a bright location, but it might need some protection from the most intense midday sun to prevent sunburn.

Light needs of blue chalk sticks senecio mandraliscae


‘Blue Chalk Sticks’ can tolerate heat, but it’s essential to remember that during its dormancy, it’s conserving its resources, so try to protect it from extreme temperatures if possible.


There’s no need to fertilize your ‘Blue Chalk Sticks’ during its dormant period. You can resume feeding it in the fall when the plant exits dormancy, and the active growth phase begins.

Remember, the dormancy period is a normal part of your plant’s life cycle. With appropriate care, your ‘Blue Chalk Sticks’ will survive the summer and thrive when its growing season returns in cooler weather.

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Wrapping Up: Enjoy Your ‘Blue Chalk Sticks’ 

‘Blue Chalk Sticks,’ is a unique, beautiful succulent that’s easy to care for, making it a perfect addition to any plant collection. With this guide, you’re well-equipped to provide the best care for your ‘Blue Chalk Sticks.’ Happy planting!