Houseplant · Marantaceae
Rattlesnake Plant
Goeppertia insignis
Those bold, wavy leaves that fold up at night? They'll pay you back once the water and humidity are dialed in.
Partial shade
64–75°F · 18–24°C
USDA 11–12
9–30 in · 23–76 cm
Overview
Ever wonder where the rattlesnake plant gets its name? It's all in the leaves, which are long and wavy with dark green spots running down a bright green blade, a lot like the markings on a snake's back. Turn one over and you'll spot a rich purple-red underside. It's part of the prayer plant family and comes from the rainforests of Brazil, where it grows down low under the canopy in warm, damp, shady air.
Hang around it for a day and you'll see why the whole group is called prayer plants. The leaves stay flat and open while it's light out, then fold up at dusk and drop back down by morning, a slow little rhythm that just follows the light. It doesn't get big indoors either, topping out around 9 to 30 inches (23 to 76 cm) tall, so a shelf or a side table works great.
Here's the honest bit: this one likes to be looked after. It wants soft water, steady moisture, and humid air, and it'll tell you straight away if something's off by browning at the leaf edges. Give it the warm, shady, muggy feel of its forest home, though, and it'll grow fast and full for you.
Care
The short version: bright shade with no direct sun, soil kept evenly moist using rainwater or distilled water, a warm room, and as much humidity as you can manage. That's really all there is to it.
Light
Go for bright but indirect light or a bit of partial shade, kind of like the dappled light it'd get under a rainforest canopy. It's fine with fairly deep shade too, so don't stress about a dim corner. Just keep it out of direct sun, which washes out the markings and scorches the leaves.
Water
Keep the soil evenly moist but not soggy from April to August while it's growing, then back off once winter rolls in. And what you water with really matters: stick to rainwater or distilled water, because the fluoride in regular tap water builds up and browns the leaf edges.
Soil
Use a well-drained, peaty mix with lots of organic matter so the roots stay damp but never waterlogged. Good news on pH, too: it's not picky and handles anything from 6.0 to 8.0, so acidic all the way to slightly alkaline is fine.
Temperature
It likes things warm, somewhere around 64°F to 75°F (18°C to 24°C). Cold really isn't its thing, so keep it clear of drafty windows and any chilly spots.
Humidity
This is the part that trips most people up. It wants high humidity, way more than your average living room has going, so set it on a wet pebble tray, mist it, or keep it somewhere steamy. Let the air get dry and you'll get crispy brown edges pretty fast.
Feeding
Feed it monthly with a balanced fertilizer through spring and summer while it's actively growing. Then ease right off in winter when things slow down, and it'll be happy.
Pruning
No real shaping to worry about here, which is nice. Just snip off any dead, damaged, or browned leaves at the base and it'll keep looking tidy.
Repotting
Repot it every 1 to 2 years in spring, or sooner if you notice roots circling the pot or poking out the drainage holes. It's also the perfect time to split the clump and get yourself some new plants.
Size & spacing
It stays nice and compact indoors, reaching 9 to 30 inches (23 to 76 cm) tall with a 9 to 18 inches (23 to 46 cm) spread. One plant fills its pot on its own, so just give it a container with a little room to grow into.
Troubleshooting
Almost everything that goes wrong shows up on the leaves first, and it usually comes back to water quality, light, or dry air. So take a good look at the leaf, and it'll normally tell you what's up. Find your symptom below, then sort out the condition that's causing it.
Leaves going yellow and limp, with a mushy base
Nine times out of ten it's soggy soil and root rot from overwatering, though weirdly, bone-dry soil can yellow the leaves too. So feel the mix and check the roots: dark and mushy means rot, dust-dry means the opposite. Water so the soil stays evenly moist but never wet, make sure the pot drains, and repot into fresh mix, trimming off any roots that have rotted.
Fix:
- Adjust watering so soil stays evenly moist but never soggy
- Ensure the pot and mix drain freely
- Repot into fresh well-drained mix and trim rotted roots if rot is present
Thin webbing with dull, mottled speckling on the foliage
That's usually spider mites, and they show up when the air gets dry. Flip the leaves over and look for tiny mites and faint webbing. Rinse the foliage off, get the humidity up, treat with insecticidal soap or horticultural oil, and keep the plant away from the others until they're gone.
Fix:
- Rinse foliage and raise humidity
- Treat with insecticidal soap or horticultural oil
- Isolate the plant to limit spread
Dry, browned edges and leaf tips
This is almost always fluoride and salt buildup from tap water, which gathers in the leaves and burns the edges while the middle stays nice and green. Dry air doesn't help either. Swap to rainwater, distilled, or filtered water, bump up the humidity, and trim the worst edges if you want it to look neater.
Fix:
- Switch to rainwater, distilled, or filtered water
- Raise humidity using a wet-pebble tray, regular misting, or a humidified room
- Trim badly browned edges for appearance only
Faded markings and bleached or scorched patches
Too much light is what's going on here. Direct sun drains that bold pattern and dries the leaf into brown scorch marks, because honestly, this plant was built for the forest floor. Shift it back to partial or full shade with bright indirect light, and don't give it anything stronger than gentle early-morning sun.
Fix:
- Move the plant out of direct sun to a partial- or full-shade location with bright indirect light only
- Provide diffused or early-morning sun at most
Toxicity
Good news if you've got pets: this is a safe, non-toxic houseplant. The ASPCA and NC State Extension both give it a thumbs up for cats, dogs, and horses, and there's nothing in the leaves to bother rabbits, birds, livestock, or kids. Pop it on the floor next to a nosy pet and don't give it a thought.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
Both the ASPCA and NC State Extension call it non-toxic to cats, so a curious nibble is nothing to stress about. That said, a cat that scarfs down a lot of any leaf might get a mild, passing bit of tummy trouble.
Dogs None
Dogs are covered on those same two lists, with nothing poisonous in the leaves to worry about. The worst a big mouthful might do is a little drool or a soft stool that clears up on its own.
Horses None
The ASPCA gives horses the okay too. It's an indoor tropical, so it hardly ever crosses a horse's path anyway, and a stray taste won't hurt.
Rabbits None
There's nothing in the foliage that's toxic to rabbits. Still, think of it as a houseplant and not a snack, because a steady diet of any ornamental leaf can mess with a rabbit's digestion.
Livestock None
No toxins means grazing animals have nothing to fear from it. And really, it's a tropical houseplant that's pretty much never going to end up in a pasture anyway.
Birds None
Pet birds can hang out in the same room just fine, since there's nothing poisonous if one decides to take a curious peck.
People None
It's totally harmless around kids, and handling the leaves won't irritate your skin. It's not grown as food, though, so there's no part that's meant to be eaten.
How to propagate
Want more of these? There's basically one easy way to do it, and it happens right when you'd be repotting anyway.
DivisionModerate
Spring, at repotting · Several weeks to a few months
The trick with this one is division, not cuttings, so the easiest time to do it is in spring when you're already repotting anyway. Just tip the plant out, gently pull the rhizome clump into sections that each keep some healthy roots and a few leaves, and pot them up separately. Keep the new divisions warm and humid, and they'll settle in over several weeks to a few months.
Myths
Really, the rattlesnake plant should be called Calathea lancifolia.
Not anymore, actually. Kew's Plants of the World Online now goes with Goeppertia insignis as the accepted name, and it files Calathea lancifolia, Calathea insignis, Goeppertia lancifolia, and Maranta insignis as synonyms. The genus Goeppertia got split off from Calathea, which is why so many old Calathea plants carry Goeppertia names these days. Your pot might still say Calathea, and that's fine, it's the exact same plant.
Like a lot of tropical houseplants, this one's poisonous to pets.
Nope, it isn't. Both the ASPCA and NC State Extension list Calathea and Goeppertia insignis as non-toxic to cats, dogs, and horses. So go ahead and keep it on the floor next to a curious pet, no worries.