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Anthurium Clarinervium: 1 Secret to Growing Them

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Anthurium clarinervium is a stunning foliage houseplant in the Aroid family and is sure to stop you in your tracks with its dark green, deeply lobed heart shaped leaves and contrasting white veins.

anthurium-clarinervium

I’ll tell you how I care for mine and also discuss Anthurium care in general. It’s a fascinating genus and one that is growing in popularity among houseplant collectors (if you can find one, that is!)

Anthurium clarinervium is native to Mexico and grows as an epiphyte. Since it is an epiphyte, it has special potting soil needs which I’ll discuss soon!

They do flower, and will look similar to many aroid family flowers in that they have both a spadix and a spathe, but they are insignificant on Anthurium clarinervium.

These plants clearly are grown for their striking, leathery, thick foliage.

Anthurium Clarinervium: Care Guide

Many species in the Anthurium genus can get prohibitively large inside the home. The clarinervium is a smaller growing species that is perfect to grow in the home! Indoors, the leaves will grow to about 6″ or a little larger.

LIGHT

These plants enjoy mostly bright indirect light or filtered sunlight. Keep these plants away from too much direct sun. A little bit is fine.

An exception is in the winter time if you live in areas with much shorter and cloudier days like I do. During those months, some direct sun will greatly benefit these plants.

My own plant sits in an Eastern facing window so it get some morning sun. In the summer, I place the plant outside in complete shade.

TEMPERATURE

Anthuriums love and thrive in warm temperatures. Aim to keep them at 70-90F (21-32C) if you can. I keep mine in my sunroom and it does get into the 60s (F) in the winter but I wouldn’t go much lower than that.

anthurium-clarinervium

HUMIDITY

Anthuriums love high humidity and are really best grown in a greenhouse, but you can grow them successfully indoors with some attention.

If your indoor winter air is dry as a result of forced air heat inside your home, I would highly recommend getting a humidifier. I experimented with different humidifiers and found one that I LOVE.

I run it from about October (or whenever we turn our heat on in the house) until April or May so (when we normally shut off the heat).

Try and maintain humidity of at least 40% relative humidity, if not more. 50-60% indoors would be better.

Do you need a good humidifier? I’m thrilled with mine, so if you need one, read my blog post where I talk about humidity and houseplants, and my absolute favorite humidifier.

I’ve tested tons of humidifiers and I talk about the best one I’ve come across. I use it on-stop during the winter!

WATERING

Anthuriums, like many orchids, are epiphytes so they grow on trees and tree branches. They are often drenched in nature from frequent rains, but they will dry out quickly because their roots are much more exposed because of the way they grow.

This is what you must reproduce in the home in order to be successful.

Don’t let these plants sit in water or it will spell death and they will rot. After you water thoroughly, make sure you discard excess water. Let it ALL drain away. Don’t let any sit in the saucer underneath.

Don’t water again until the top inch or two of the potting mix is dry. Just use your finger to determine that.

You’ll want to try to keep most of the potting mix lightly moist, with the top couple inches being dry and the rest of it being barely moist. If it is still wet underneath, don’t water. Wait longer and check your plants regularly!

You can’t just have good watering techniques though. Epiphytes like Anthurium demand an appropriate potting soil as well in order to thrive.

anthurium-clarinervium

SOIL

Since these plants are epiphytes, they require fantastic drainage. To accomplish this, I like to add orchid bark to my potting mix. This is the “secret” to growing these plants.

You can start with 1 part of orchid bark to 2-3 parts of whatever all-purpose peat-based houseplant potting soil that you like to use. This will provide the amazing amazing drainage that they need to thrive.

You can also throw a handful of perlite in the mix for good measure.

Equal parts potting mix, perlite and orchid bark results in a nice, chunky mix that these plants love. This is the mix that I am currently using for this plant.

FERTILIZING

Fertilize throughout active growth in the Spring and Summer time. I like to fertilize dilutely with every watering (or almost every watering).

My favorite houseplant fertilizer is Dyna-Gro Grow and I purchase on Amazon. I add 1/4″ teaspoon per gallon of water and use it on all my leafy tropicals.

It is an amazing, COMPLETE fertilizer and is urea-free so it won’t burn your plants. I highly recommend this fertilizer and I’ve had great results from using it.

AIR CIRCULATION

Since these are epiphytes, they love air circulation. Think about it. In nature they’re growing on the side of cliffs, rocks, and on trees, so they’re exposed to a good amount of air circulation.

Air circulation will benefit all plants, but especially epiphytes like Anthuriums. I’m not talking about cold drafts though 🙂 You’ll want to avoid those.

I like to gently circulate the air in my sunroom with my ceiling fan. I’ll turn it on low and it will provide circulation for my Anthuriums, orchids, and all the other plants.

If it is warm outside, open a window for air circulation. Or better yet, let it sit outside for the summer in the shade to get the benefit of rainwater, natural air circulation, and higher humidity levels.

PROPAGATION

Propagation is best done by division when you repot, if your Anthurium has more than one stem. Gently loosen the roots and tease apart any new section of growth.

Make sure each division has roots and at least 1 or 2 leaves of its own and pot it up separately.

Where to Buy Anthurium Clarinervium

This is the real challenge! This is a very hot plant that is both expensive and difficult to find. Most websites that you find will have the dreaded “out of stock” phrase next to Anthurium clarinervium.

The most reliably stocked location is Etsy.

Looking to purchase an Anthurium clarinervium? One of my favorite and most convenient one-stop-shops to buy practically any plant is Etsy. Check out the Anthurium clarinervium selection (link to Etsy) today!

Regardless, here are a couple other sources to keep your eye on and you can even get on the waiting list for some of them. They are both fantastic companies and I’ve had great experiences with both of them.

NSE Tropicals in Florida has an amazing array of tropical plants and I highly recommend them.

PA Orchid Exchange is where I purchased mine, but it is not a regularly stocked item (but then again, it probably isn’t a regularly stocked item anywhere!). Mine was beautifully packed when I received it.

anthurium-clarinervium

ANTHURIUM CLARINERVIUM FLOWER

No one grows this plant for its flowers, but I’ve found that they do appear pretty often.

anthurium-clarinervium-flower
A partially opened flower on my Anthurium clarinervium

Since the flowers are insignificant, I usually just cut them off so that my plant can focus its energy on growing new leaves.

ANTHURIUM CLARINERVIUM PROBLEMS

ROOT ROT

I have learned not to always trust the potting mix that plant comes in. The potting mix that mine came in was not sufficient. Even though I knew better, I didn’t change it out for a while.

Anthuriums need a chunky, airy potting mix. Mine stayed too long in a mix that wasn’t chunky porous enough and it suffered from root rot.

anthurium-clarinervium

I was a little surprised once I took my plant out of the pot and saw that the root system above.

After this point, I placed it in a pot with equal parts all-purpose potting mix, orchid bark and perlite and the plant is thriving.

YELLOW LEAVES

Yellow leaves can be caused by a number of things, and because of this, it is up to you to troubleshoot. Yellowing leaves can be caused by:

  • Potting mix that has gone completely dry for too long.
  • Potting mix that has stayed too wet for too long. Many things can contribute to this: not enough light, a poor potting mix, pots with no drainage, and pots that are much too big for the plant’s root system.

CURLING LEAVES

Normally, when leaves curl, it can be caused by the following:

  • Potting mix that is too dry
  • Potting mix that has stayed too wet
  • Low humidity is often an issue with these plants. Try and provide at least 40-60% relative humidity indoors.
  • Temperatures that are too cold or too hot.

If you’d like to know how I grow the “common” Anthurium that you see everywhere, check out my Anthurium Care: Growing Flamingo Flower blog post. I’ve had this plant below for over 15 years and is one of my oldest and most prized plants.

anthurium plant care

Do you have any Anthuriums? Comment below with any questions!

Please do me a favor and share this post to social media because it will help me spread the Ohio Tropics houseplant care tips to the masses! Also, check out my shop on Amazon for all your houseplant care needs:

OHIO TROPICS PLANT CARE STOREFRONT

Hannah

Friday 17th of September 2021

Do you use any pole/support for your Anthuriums?

Raffaele

Monday 27th of September 2021

Hi Hannah! My clarinervium isn't very big yet so I don't have any support right now, but it will need one in the future!

Wil

Sunday 25th of April 2021

Hi, I just received a single leaf antherium clarinervia .. I was about to transplant it the next day when I see the back of the leaf has what looks like a white film on about 50 percent of the back. The seller has yet to respond, I am concerned. Thank you

Raffaele

Monday 26th of April 2021

I'd have to see a photo to try and help, but maybe wait and see what the seller says and hopefully things will be ok! If you'd like to send me a photo, use the contact form on my site to email me, and when I respond, you can attach the photo.

Marie dufay

Sunday 21st of March 2021

Hi Raffael, thank you so much for this very helpful article! I just got a tiny Clarineverium two days ago, and I am so afraid to kill it! I was told to use orchid moss on top of the soil and keep it wet so my plant would thrive. Is that truly helpful? I’m also debating buying growing light a humidifier (?) I don’t get much natural light in my appartement, which is why. Thank you so much for your help! Best, Marie

Raffaele

Wednesday 24th of March 2021

Hi Marie! Glad you found the post helpful! As far as the moss on top...it's not necessary. What is underneath though? Is it a super-chunky mix? Or does it look like plain potting soil? Depending on what is underneath, some sphagnum moss on top might help, but I wanted to ask. A grow light and humidifier sounds like a great idea if you don't have much natural light and your air is dry.

Mars

Sunday 21st of February 2021

Thank you for posting this. I have one with a new leaf growing but it looks wrinkly and as it's slowly unfurling, I see a couple of holes in the leaf

Wish I could share a photo but if you send me an email address I will send one to you. Hopefully by then it will have recovered.

Nicole

Saturday 14th of November 2020

Hello Raffaele, this post was very informative!! Thank you so much for this. My clarinervium leaves are not sitting flat and are starting to curl a little and ruffle on the edges a bit. I wasn’t sure if it’s a humidity or the leaves telling me they’re thirsty.

I just potted it in my aroid mix (coco coir, orchid bark, perlite, horticultural charcoal) 2 days ago in a terracotta pot. I run a humidifier so it’s about 50-60% but it’s gotten colder her in CA so temp in the house is 68-70 degrees.

Thank you in advance!

Raffaele

Saturday 14th of November 2020

Hi Nicole! The key is to feel your potting mix whenever you notice something wrong. Did you feel your soil when you noticed the issue? My hunch is that it was probably dry? I know you said that you just started using the aroid mix a couple days ago, but keep the following things in mind. Your mix sounds like the drainage should be amazing, but is it retaining enough moisture? It's all a balancing act. How do you water? Do you thoroughly soak your potting mix? With really chunky, airy mixes like you described, it becomes even more important to soak it well since it drains so sharply. In addition, since you have it in a terra cotta pot, it would dry out even faster. You may need to water more often than you think, so use your finger to feel the mix. I don't know if you use moisture meters, but I would recommend not using one. Use your finger. When the potting mix is dry in the top inch or two, it's time to water again. Take it to your sink and give it a nice thorough watering at that point :-). I hope this helps!