The Alocasia ‘Black Velvet’ is a real dark gem of a plant.
As part of the very exclusive club of plant species with (almost) black foliage, Alocasia reginula ‘Black Velvet’ makes a striking statement wherever you put it.
Which – as a surprisingly versatile plant – is actually a lot of places.
Known as one of the “jewel alocasia,” this plant is destined to stay small, sweet and classy throughout its life – making this plant super accessible to terrarium lovers and indoor plant parents alike.
Overall, Alocasia ‘Black Velvet’ are relatively straightforward to care indoors and in glass, but they do have some important watering nuances that you need to know in order to protect their roots and keep them healthy.
So read on to find out!
A (Royal) Introduction to Alocasia reginula ‘Black Velvet’
Native to the jungles of Borneo, Alocasia reginula ‘Black Velvet’ is a tropical plant with a truly regal name.
Not just the ‘Black Velvet’ name which of course sounds incredibly luxurious… but even the botanical name Alocasia reginula literally means the “little queen”.
Honestly, I think the foliage of this plant really does the name justice (though we call ours Alannah for the classic song that bears its name).
With silvery veins piercing through black velvety leaves, it provides a powerful contrast to a typical green backdrop – making Alocasia ‘Black Velvet’ an excellent focal piece for terrariums or plant shelves!
Alocasia Black Velvet Care & Growth
At a Glance
|Lighting||Bright indirect light|
|Watering||Infrequent, moderate moisture|
|Humidity||Medium – high humidity (40-70%)|
Alocasia ‘Black Velvet’ will thrive in a bright spot with lots of indirect light, but their dark pigmentation suggests they’re able to cope with lower light levels to some extent too.
I’ve found that they’re able to handle a small amount of direct sunlight in the winter months, but you’ll soon start to see their leaves start to curl if the light is too harsh.
As a plant naturally found on the rainforest floor, they’ll do well under the shade of other nearby plants, so feel free to group your Alocasia with some friendly foliage on the shelf or in your terrarium!
Alas, it can be all too easy to over-water Alocasia reginula ‘Black Velvet’.
It’s not that Alocasia don’t love water (as tropical plants they most certainly do), it’s more that they have a surprisingly low tolerance for consistently wet environments.
I can relate…
The thick leaves of this Alocasia hint to its moisture retaining abilities, but really it’s the rot-prone roots that dictate its watering needs.
So, there’s two components to getting your watering right:
- Add water only when your substrate is dry to the touch. In terrariums, this means achieving a moisture balance with minimal water input (see our guide to watering terrariums for more help) and it’s probably best paired with other tropical species with low water requirements (see the Goes Well With section below).
- Whether you grow this plant in a pot or a terrarium, proper drainage is essential. That’s means both somewhere for the water to drain to (via a hole or drainage layer) and having an appropriate soil/substrate that the water can drain through.
Using a substrate with good drainage is important to prevent this plant from developing root rot, but thankfully most tropical mixes are designed to do just that (e.g. ABG mix).
Opting for a granular mix high in orchid bark and sand will help to provide the necessary drainage and root aeration, and you can supplement with additional perlite or vermiculite as necessary.
However, I’d recommend you also reduce the sphagnum moss and coco coir content from your typical tropical mix, as you won’t need quite as much water retention with Alocasia ‘Black Velvet’.
Temperature & Humidity
As a commonly grown indoor plant, Alocasia reginula ‘Black Velvet’ will comfortably grow in most household conditions.
That being said, for a tropical species that doesn’t like an overly moist soil, it really does appreciate a higher humidity and temperature.
Really, you’ll need a humidity level of 50%+ to really keep them at their happiest, but that should be easily achieved with a pebble tray, humidifier or closed terrarium.
Also, Alocasia ‘Black Velvet’ isn’t particularly cold hardy, so you’ll want to make sure they aren’t anywhere near a cold window in the Winter months.
If it’s too cold for you to sit near it, you can be sure it’s too cold for your Alocasia!
As a jewel alocasia, you can expect this species to grow at a slow rate, and stay pretty compact even when fully mature.
Personally, I’ve found that this plant will often allow its older leaves to die off in favour of creating new ones – so that can really slow down the whole growth process too.
They’ll occasionally bloom with a simple white flower, but it’s not much to look at.
Some natural fertilisation (e.g. earthworm castings) can help get your Alocasia off to a good start, but they’re unlikely to need any further supplementation.
They’re also quite happy being slightly root bound, so you’re probably not going to need to repot them much, and they’ll fair well in fuller terrariums.
Alocasia won’t grow from stem or leaf cuttings, but you’ll find they’re often a group of plants clumped together that you can divide, or they naturally form new baby plants anyway.
So, the easiest way to propagate Alocasia reginula ‘Black Velvet’ is to expose the central rhizome, identify any offsets and remove them with your hands or a clean knife if necessary.
These can be planted up as they are.
Varieties & Similar Plants
Several of the other jewel alocasia varieties are excellent candidates for terrariums, including Alocasia baginda ‘Dragon Scale’ and Alocasia cuprea ‘Red Secret’.
There is a green velvet alocasia (Alocasia micholitziana ‘Frydek’) but it’s much larger, comes with a green foliage and more of a serrated arrowhead shaped leaf.
Goes Well With
This Alocasia is going to be best paired with other drought tolerant tropical species to give you some wiggle room in your watering.
By far the most common problem in growing Alocasia reginula ‘Black Velvet’ is over-watering. However, through careful watering and use of a well-draining substrate you can certainly get the moisture balance right.
As with other Alocasia, this plant can be prone to spider mites if you’re growing it in a pot. So, quarantining any new plants is always a good idea before adding to a terrarium.
That being said, a higher humidity is one of the most effective ways to combat spider mites so crank up the humidity and moisture to keep your plant happy and those pesky mites off.
Frequently Asked Questions
Curling leaves is usually a sign of too much light, but it could also be conflated by underwatering.
Typically, yellowing leaves can be a sign of both underwatering and overwatering plants (unhelpful, I know). Though, in the case of Alocasia I’d say it’s more likely to be the latter, so if you’re watering often then try pairing it back a bit.
It’s common for healthy Alocasia to lose leaves as they mature, so it’s often nothing to worry about. They like to sacrifice older leaves so they can supply all their nutrients to newer, bigger leaves. It’s all part of the process!