SKU: 20074406086
alocasia black stem elephant ear plant

alocasia black stem elephant ear plant Alocasia 'Black Cobra' – Black Jewel Elephant Ear – Sprouts of Bristol

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Description

alocasia black stem elephant ear plant Alocasia 'Black Cobra' – Black Jewel Elephant Ear – Sprouts of BristolThis Alocasia's bold, dark stems give it a striking appearance and help it stand out in any plant collection. The large, mid green leaves are a glossy texture with the distinctive, curved arrowhead shape characteristic of the genus. With its enigmatic shapes and tall, upright growth habit, this Alocasia will really make a statement in your home. A favourite for collectors, it's easy to see why this might be a popular choice. Keep this plant cosy, warm

This Alocasia's bold, dark stems give it a striking appearance and help it stand out in any plant collection. The large, mid-green leaves are a glossy texture with the distinctive, curved arrowhead shape characteristic of the genus. With its enigmatic shapes and tall, upright growth habit, this Alocasia will really make a statement in your home. A favourite for collectors, it's easy to see why this might be a popular choice. Keep this plant cosy, warm and humid and it will reward you with plenty more of its distinctive leaves and stems. 

Scientific Name
Alocasia macrorrhiza 'Black Cobra' (not-colocasia with big roots)

Synonyms: Arum macrorrhizon, Caladium macrorrhizon, Colocasia macrorrhizos

This plant is likely a hybrid with or cultivar of the species given. A. macrorrhiza was published as a species name in 1839.

Common Name
Black Cobra Alocasia, Black Jewel Elephant Ear, Black Jewel Alocasia

Origin
Originating in Oceania, this plant is native to Northeastern Australia, the Bismarck Archipelago, Borneo, Maluku, New Guinea, the Philippines, Solomon Islands and Sulawesi

Light
Make sure this plant's location is bright during the daytime; avoid direct midday or afternoon sun, which can scorch it, but a spot of morning or evening sun will be helpful, especially in autumn and winter.

Water
Let the top third of the soil dry between waters; water less in autumn and winter.

Humidity
Alocasias do best in moderate humidity; a pebble tray to increase local humidity will be useful in drier areas, or while radiators or fans are operating.

Soil
Use a blend with plenty of moisture-retentive elements like coir and vermiculite while allowing oxygen to the roots, with elements like bark or zeolite. A mix designed for Alocasias would be ideal. Repot every two years in spring, and make sure to water the day before to help the roots adapt.

Food
Feed your Alocasia every four waters while it's growing more in spring and summer, reduce to every six in autumn and winter.

Temperature
Happy in a range of temperatures between 10-30°C, your Alocasia will grow best between 18-30°C, and needs to not drop below 10°C suddenly or for long periods.

Pet-safe
No, this plant is toxic to pets and small humans, so keep curious fingers and paws away.

Sprouts Top Tips
Rapidly-yellowing older leaves are a sign of too much water, so if you spot this, make sure you're allowing the soil to dry out a little before watering again. Too much water can cause your plant to rot.

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SKU: 20074406086

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TitothePinkTorpedo
Bozeman, US
★★★★★ 5
Great Product for noise reduction in Auto Use.
Model: 36 SqFt(3.4 SqM)
I use this on many builds to dampen the metal echo in cars, vans, and trucks. Just one sheet in the center of a body panel is a huge difference maker. You can also cover the entire surface and get added insulation value. The noise is greatly depleted and it's easy to install with a roller tool. Looks Great when done. Good Product I will use again!
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Reviewed in the United States on December 29, 2025
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Kev
Chelsea, US
★★★★★ 5
Makes For Quiet Rides
Model: 10 SqFt(0.95 SqM)
Comparable quality and performance to name brand competitor. It sticks on strong, easy to apply, and does make a difference in sound reduction. Turn your hollow shell sounding vehicle panels into solid sounding walls.
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Reviewed in the United States on March 15, 2026
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Troy Amhaz
Lake Worth, US
★★★★★ 5
Must for subwoofers. True 2mm spec. High quality.
Model: 36 SqFt(3.4 SqM), Model: 36 SqFt(3.4 SqM)
Let me start of by saying WOW! This made a huge difference in the SQ of my L7S pushing 930w rms. Before I had major rattles in my 2020 Honda Civic SI. Taking the time to do this to my trunk and Lid made me realize just how loud my subwoofer actually is. It literally eliminated the rattles throughout my whole car. I still plan on doing this to my doors and rear deck but once I upgrade the speakers. I still have half of the box just doing the trunk and lid so 1 box of 36sf will be enough for most of the areas that need to get done. You may need a little more overall. This is true 2mm spec. Very sticky and easy to apply. It just take time to finish the work correctly and roll it down. It is not as heavy as I thought it was going to be. The size of the sheets are perfect for what you need to do. The value is on point for the quality. It does not rip very easily but you can cut it to size without any problems. Again, This is a must buy for anyone who is pushing 1000w rms or more.
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Reviewed in the United States on November 29, 2025
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Craigdog
Houston, US
★★★★★ 5
Quality product you
Model: 18 SqFt(1.7 SqM), Model: 18 SqFt(1.7 SqM)
Summary: Great quality product, priced right. Cuts and installs easy-follow the instructions people!! PRO TIP-you don’t need to cover every square inch. OVERKILL!! Think about it-when a bell rings you could put your fingers on the edge and silence it right? Same rules apply here. A strip or square will isolate the vibration and notice when placed correctly— knock on the surface and see what vibrates or what part makes the loudest drowning and that’s a good clue of where you should put a piece of this…unless you’re trying to use it for temperature insulation no need to go ape on it. If you look at the bottom of a stainless steel sink, it’s got a stripe or a small sticker of insulation that keeps it from rattling. You can do that here. What’s important to note is the instruction specifically say use a roller to roll the ribs out until it’s smooth that way you’ve got maximum adhesion. I see a lot of pictures and videos from people that finished their install and didn’t follow this simple instruction. It makes sure that it’s stuck down before you put all your paneling and carpet back in and it’s a small step with a cheap wooden roller it’s easy. I’ll say the installation with this product is a breeze. You can use sharp scissors or a blade. It does get gummy after a while, and you may need to clean off your blade or your scissors, but it cuts very well and the ribs make it easy to size in space the thickness is fantastic and the backing paper comes off quite easily. I’ve done lots of installations with Graphics emblems you name it and this product is very easy to use and represents good value.
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Reviewed in the United States on March 30, 2026
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Shopper
Waukegan, US
★★★★★ 5
Good stuff !
Model: 36 SqFt(3.4 SqM), Model: 36 SqFt(3.4 SqM)
This is an excellent product. Easily moldable, cuttable with good scissors or razor knife, very sticky, works great. This pack was enough to do all 4 doors on a crew max truck, and I went wild on the fronts. I used 9 peices on each rear door which was just enough, and the rest on the fronts. I doubled up layers and even used some on the back of the door panels. If you follow the instructions and dont go wild you might even have extra left over. It works just like you would imagine. Without doing the entire cab there will still be road noise but this helped noise, better audio, no buzzing door panels, terrific improvement. It is kind of heavy, so extra weight is added to truck, but that really isnt a bad thing. It is noticable but in a good way. Get it. Use it.
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Reviewed in the United States on March 20, 2026

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