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can you grow pencil cactus indoors

can you grow pencil cactus indoors Pencil Cactus

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Description

can you grow pencil cactus indoors Pencil CactusIntroducing the Pencil Cactus, botanically known as Euphorbia tirucalli Fire Sticks (also called Sticks on Fire), a striking succulent prized for its sea coral like appearance and vibrant, loosely branching pencil thin stems that develop brilliant shades of green, orange, and red. Native to Southern Africa, this unique succulent belongs to the Euphorbiaceae (spurge) family, not the cactus family (Cactaceae), though it is commonly referred to as Pencil

Introducing the Pencil Cactus, botanically known as Euphorbia tirucalli ‘Fire Sticks’ (also called Sticks on Fire), a striking succulent prized for its sea coral-like appearance and vibrant, loosely branching pencil-thin stems that develop brilliant shades of green, orange, and red.

Native to Southern Africa, this unique succulent belongs to the Euphorbiaceae (spurge) family, not the cactus family (Cactaceae), though it is commonly referred to as “Pencil Cactus” because of its cactus-like form and upright growth habit. It is also known by several other common names, including fire sticks plant, sticks on fire succulent, fire plant, red pencil tree, milk bush, and Euphorbia tirucalli ‘Rosea’.


When exposed to direct sunlight, the tips turn red, which is why they are also called firesticks.

This fast growing evergreen succulent can grow up to 30 feet tall and 10 feet wide, forming a thicket of brilliantly colored vertical stems with loose branches.

The unusual stems of this firestick plant, which are as thin as pencils, have a reddish-golden hue that becomes yellow in the summer and red again in the winter.

The pencil cactus flowers boast vibrant yellow, pink, or orange blooms in the summer and spring, making them a true showstopper in any garden.

The pencil cactus is extremely drought tolerant and hard to kill, and as a result, is a great, low-maintenance, easy-care plant for your home or garden.

You can grow your pencil cactus indoors year-round as a houseplant. If planting outdoors, it's best to do so in the spring when temperatures are warm and stable. This cactus grows faster than many other cacti, making it a striking addition to your garden or home.

If you cut your pencil cactus, be careful—the thick, white sap is toxic and can cause skin irritation, burns, or severe eye irritation if it gets into your eyes. While highly irritating, some cultures have historically used it in traditional medicine for treating growths like warts and tumors, though it is not safe for home remedies. Always wear gloves when handling the plant and wash your hands thoroughly if you come into contact with the sap.

When and How to Water Your Pencil Cactus 

This pencil cactus firestick plant can withstand droughts and doesn't need to be watered frequently to survive. Watering these perennial succulents should be done every 3–4 weeks or when the soil feels dry. Let the soil completely dry out between waterings, and if in doubt, give your fire plant a little more time before watering again.  Less water is needed for humid locations and indoor spaces. Pay attention to how the pencil cactus looks and adjust the watering accordingly.

Remember that succulents in the desert can go for weeks or even months without water, so water them sparingly during their rest phase and moderately during their active growing season.

Pro Tip

Most people like to see the red tips that give this Euphorbia tirucalli its firestick name. Note that it is stress that causes the tips to go red. So, the art is to stress the firestick plant a bit, but not too much. So, give it a lot of light and water it less than other succulents, so it is thirsty but not dying of thirst.

Overwatering can also cause the Euphorbia tirucalli 'Firesticks' tips to turn red, but it can also lead to root rot and other problems. So, if your pencil cactus is not turning red in full sun, it's possible that it's not experiencing enough stress to produce the anthocyanin pigments or that it's receiving too much water.

Light Requirements - Where to Place Your Pencil Cactus 

Like most succulents, indoors, the Euphorbia tirucalli firesticks need bright, indirect sunlight to thrive, so choose the brightest area in the house.

Potted indoor pencil cacti require four hours of direct sunlight, which can be achieved by locating them on a sunny south or west-facing windowsill. 

If you are growing these firestick succulents outdoors, make sure that they receive at least six hours of direct sunlight per day.

Partial shade may be tolerated as long as your pencil cactus gets the majority of the sunlight that it needs when it's planted outside. This succulent plant won't thrive if left in the shade for a long time. Its colors become more vibrant the more sunlight it receives.

In order to avoid sunburn, it is preferable to acclimatize your pencil cactus first before moving it outdoors or increasing the amount of sunlight it receives.

Optimal Soil & Fertilizer Needs 

The firestick Euphorbia is a succulent plant that likes very airy, porous, nutrient-rich soil with a pH of 5.5–6.5. Succulents require fast-draining soil that dries completely between waterings. Ideally, you want to use our specialized potting mixGo to soil cactus mix blend 1 gal 4 qt cacti succulent dirt compost growing media that contains 5 natural substrates and organic mycorrhizae to promote the development of a strong root system that helps your Euphorbia firesticks Pencil Cactus to thrive. 

When it comes to fertilizing your pencil cactus plant, it only needs a small amount of fertilizer applied once a year in spring. Cacti prefer a fertilizer with lower doses of NPK, with a maximum ratio of 5-10-5 that is higher in phosphorus than nitrogen.

Hardiness Zones & More 

When growing indoors as a houseplant, the Euphorbia firestick can tolerate temperatures between 65 °F and 75 °F. Your Euphorbia firestick plant performs well in temperatures above 30 °F. However, it can withstand temperatures below that, but only for short periods of time.

In the United States, the Euphorbia tirucalli is mostly an indoor plant, but if you live in southern Florida or Hawaii then you can cultivate it outdoors in USDA zones 10 -11.

Growing these pencil cacti in containers is the best option if you live in an area with harsh winters.

By doing this, you can bring your Pencil Cactus indoors during the winter or any time there's a chance of frost or snow. Normal house humidity is fine for this Euphorbia, but it prefers dry conditions. 

Wildlife - Euphorbia tirucalli Attracts the Following Friendly Pollinators

The Euphorbia tirucalli flowers attract a variety of pollinators, such as bees, butterflies, and hummingbirds, with their bright colors and sweet nectar. These pollinators play a crucial role in the ecosystem by helping to fertilize plants and promote biodiversity.

Butterflies
Bees
Hummingbirds
Lady Bugs
Multi Pollinators
Other Birds

According to ASPCA, the Euphorbia tirucalli 'Firesticks' is mildly toxic to humans and pets. It can irritate the skin, eyes, and gastrointestinal tract. However, it is safe to touch as long as precautions are taken to avoid contact with the sap. Wear gloves when handling this plant to prevent any potential skin irritation.

How to Propagate Your Pencil Cactus

When it comes to pencil cactus propagation, one common method is through stem cuttings. Simply take a cutting from a healthy pencil cactus, let it dry for a few days, and then place it in well-draining soil. Another method is through division, where you carefully separate the offsets or side shoots from the main plant and plant them individually.

Key Takeaways

  1. The stems of firesticks are as thin as pencils (hence the name) and turn a fire-red in the winter.
  2. Euphorbia Firesticks is a stunning variety that changes color with the seasons, turning bright red or orange tips in cooler temperatures or full sun.
  3. This succulent has a rapid growth rate, reaching up to 30 feet tall when grown outdoors, with a branching, upright form.
  4. During the spring and summer, the yellow flowers bloom in clusters on the end of the branch, usually for just a few days.

The Bottom Line

Overall, the pencil cactus (Euphorbia Firesticks) is a unique and striking succulent plant that adds a touch of elegance to any space. With its slender, pencil-like stems and vibrant green color, this sticks-on-fire cactus can truly be a showstopper. However, it's important to remember that the pencil cactus is not a true cactus but rather a succulent. It requires minimal care, preferring bright light and well-draining soil. By providing proper pencil cactus care, you'll have a beautiful and unique Euphorbia firestick plant that will thrive for years to come. 

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Mrs. Mcginty
Carnegie, US
★★★★★ 4
Great idea
Color: Blue, Size: 28" x 34"
This is a great product mainly because it holds down the pads and if anyone has tried to do the inside to outside training that was a huge plus to have it not blowing away constantly the only reason. For the 4 star and not 5 is the middle tends to have a lump of bunch up cause it does not have a section to cover but only way to make this better is to have the top be completely seperate but either way better then most I have tried
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Reviewed in the United States on January 31, 2026
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C. G.
Lowell, US
★★★★★ 5
Great investment! It'll save your floors and help train your pup by giving him/her a specific area to pee/potty in the house!!
Color: Blue, Size: 17" x 23", Color: Blue, Size: 17" x 23"
Though my pup sometimes like to pee right at the edge of this puppy pad holder, when he does, he usually just hits the lip of holder. He's a beagle/dachshund mix, and will probably end up around 20lb - he's around 15-ishlb now - so not a tiny dog, but is still a small dog. And with him being "not" tiny/toy, and him being a male, he tends to not aim so well sometimes when he uses it. This made using the PP holder a learning curve for me. I started out using the regular size pads in it , which fit amazing well; however, with Morty's - ahem! - mishaps with aiming, I tried doubling-up on the training pads - would put two of the reg size pads on the holder - and that left just enough pad "hanging" outside of the holder to meet Morty's mishaps in aiming. I was even able to still fasten the holder through the pad, which is awesome! However, using double to pads to cure Mort's lack of ability to aim for the center every time was costly, so I decided to shop around to see if I could find a solution to our aiming whoes. That's when I stumbled upon these pads at Walmart for just under $10 before tax, but they are available to purchase here at Amazon, & it occurred to me that perhaps one XL pad would give Morty that extra allowance he needed, and it could be more affordable to me - it worked! . These particular pads have been working out wonderfully because I continue to use just one pad and still get the overage protection - I'm pretty sure Morty intentionally pees on the edge sometimes - but since they're quite absorbent, it's very rare that he misses so much that he pees "through the pad." [The time he pees through the pad are the times he literally barely even hits the holder/pad at all because like I said, I'm pretty sure he aims for the edge on purpose most of the time.] Since Morty is a beagle/dachshund mix, he is a scent hound, which means that I can never just "let him outside" - I always walk him outside with a leash - because scent hounds follow their noses [pretty sure his nose is more Beagle than Dachshund lol]. And with it being extremely hot out now, I allow him to pee indoors at least 50% of the time; I am absolutely thrilled that he has taken to his wee-wee pad like a pro. All and all I'm very satisfied with this purchase because it has allowed us to have a clearly defined, and mostly contained space within out home for our pup Morty, to go potty in the house, and without ruining our hard floors. Moreover, since the holder itself is plastic, cleaning it up is a breeze! I just spray a bit of Clorox Clean-up on the holder, wipe it and voilà - odor-free home! As an aside; the holder mentions being skid proof, and though I don't doubt the validity in that claim since the feet, which are on the four corners, do have rubber on the bottom, Morty is still a 7-month-old puppy, and sometimes, he can be a bit ornery and play with his pee-pad - which is always fastened inside the holder. And that subsequently allows him to move the holder from it's original spot because he "pulls" it since he's trying to "pull" the pee-pad off. Also, when my daughter and her friends play fetch with him, sometimes they'll throw his tow toward the same area that his holder sits. When that happens, he tends to run across the pad/pad holder and cause it to move. I'm attaching a video to illustrate what I mean. On this particular day Morty was playing by himself with an empty two liter bottle - he loves bottles! On this occasion, his pad/holder is not in it's normal spot - he's actually moved it into the kitchen. Toward the end you can here him baying out the door at someone/thing. I believe it may have been the neighbor lol :) But since the times that Morty is able to move the holder are during times in which his doing it intentionally, I still wouldn't dock it for "not" being skid proof because it clearly is. I just wanted to point this out in case you furry family member is anything like mine, and is full of energy - I don't think there much of anything in my house Morty can move when he has high-energy like that. Also in the video, you can see how the XL pads fit onto the regular size holder, and the extra overage it provides - should you have a dog like Morty who needs a little extra overhang because of his aiming woes. I've also included photos of my pup, Morty. He'd climbed up on the chair for no reason really, but it's another example of his high-energy :)
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Reviewed in the United States on July 22, 2017
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Emily
Grantham, US
★★★★★ 5
Does what it says
Color: Dark Gray, Size: 22" x 22"
I was using just a puppy pee pad on the floor, but when my puppy started to become rambunctious....she'd quickly grab it and play with it...shred it and try to eat it. I also noticed that she tended to only want to use the edges of the pee pad majority of the time....so I typically ended up with it on the pee pad and then a puddle next to it. I had to do something. On Amazon I go like always and I found this. Didn't even know this existed. Works beautifully. I've had this for around 2 months now. Fits standard pee pads perfectly. It cleans easily. It doesn't hold in any odor. This does not completely keep my puppy from peeing on the floor. This is not the products fault, she aims towards the edges for whatever reason. If anything, it's helped keep more of it in. The raised edges do seem to encourage her to stay inside of it. We rarely have "accidents" now and no more shredding pee pads. See below. *On another note- she has scratched at the pee pads, like she's digging in the dirt for gold as well as chewed on the plastic a fews times. I was worried I'd have to find another solution. She gets redirected with her chew toys and gets a treat every time she uses it correctly (no chewing or digging). At this time it doesn't seem like it will be an issue that I need to address. She hasn't done it since. So if your dog is determined this will NOT stop them. This product is not indestructible, please know this! It can be chewed on and if determined they can still get to the pee pad. I don't understand why some people rate it poorly when the product is doing what it's "intended" to do. You just have to know your situation and find the best solution you can live with. A dog is going to be a dog. Please address why they are doing what they're doing to begin with. I realized that my pup (*puppies will chew) wasn't getting enough mental stimulation, she's an Aussie. She had physical but not enough mental stimulation. Combine that with making sure we only encourage the wanted behavior and simply dismiss the unwanted behavior. I'm not saying I'm a pro, far from it... nor is everyone's situation the same....I'm just saying don't expect a product to do your job, expect what it says it's intended use is for. :)
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Reviewed in the United States on August 27, 2024
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A. Iacono
Birmingham, US
★★★★★ 1
NO GO!
Color: Dark Gray, Size: 22" x 22"
I was really hoping this would work, but it did not. The minute I put the tray down with puppy pad secured, my puppy managed to chew and dig at the edges ripping the pad away from the side of the tray and making a huge mess! I am not returning it bc this company makes you take it to UPS which is not convenient for me, so maybe I will donate it. If your puppy is massive chewer this may not be the thing for you.
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Reviewed in the United States on May 2, 2026
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T.H
Pawtucket, US
★★★★★ 3
Great idea.
Color: Dark Gray, Size: 22" x 22"
Great concept! Unfortunately, the plastic area underneath the pad area isn’t very thick and flexes. When my dog used it the first time the plastic flexing up and down under her feet frightened her a little bit. I placed a rubber mat between the pee pad and the flimsy plastic and that stopped the plastic from flexing but since it scared my dog from the first use she won’t go back on it.
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Reviewed in the United States on March 17, 2026

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