SKU: 1783563276
bird's nest fern osaka

bird's nest fern osaka Asplenium antiquum 'Osaka'

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Description

bird's nest fern osaka Asplenium antiquum 'Osaka'Asplenium antiquum 'Osaka' Asplenium antiquum 'Osaka' is a cultivated Japanese birds nest fern with upright, glossy fronds and noticeably rippled margins. The plant grows from a central crown, forming a bright green rosette with a visible centre and rippled outline. The narrow fronds and rippled margins give 'Osaka' a lifted, wavy rosette. Each new frond unfurls from the middle and gradually firms into a curved blade with a crisp edge as the rosette

Asplenium antiquum 'Osaka'

Asplenium antiquum 'Osaka' is a cultivated Japanese bird’s nest fern with upright, glossy fronds and noticeably rippled margins. The plant grows from a central crown, forming a bright green rosette with a visible centre and rippled outline.

The narrow fronds and rippled margins give 'Osaka' a lifted, wavy rosette. Each new frond unfurls from the middle and gradually firms into a curved blade with a crisp edge as the rosette fills out.

Asplenium antiquum 'Osaka' key traits

  • Cultivated Asplenium antiquum selection with a compact rosette habit
  • Glossy, narrow fronds with strongly rippled margins
  • Fresh green colour with a clear central midrib on each frond
  • Visible crown with room for wavy fronds to expand
  • Evergreen fern for warm indoor growing with steady moisture

Asplenium antiquum 'Osaka' shape and background

Asplenium antiquum is native to East Asia, where the species grows in shaded, humid habitats as an epiphyte or perennial fern.

The plant’s form reflects its bird’s nest habit. Fronds radiate from a single crown, while the base of the rosette stays slightly cupped. In nature, related bird’s nest ferns collect moisture and organic debris around the crown; in a container, the crown should stay open, with water directed to the substrate and airflow around the centre.

Asplenium antiquum 'Osaka' care routine

  • Light: Grow in bright indirect or medium filtered light. The rippled fronds hold their shape best away from harsh direct sun.
  • Watering: Keep the mix evenly moist, then let the upper layer lose excess wetness before watering again. Aim water at the substrate edge so the crown stays open.
  • Substrate: Use a loose fern mix with fine bark, coco fibre and perlite or mineral grit. Dense soil keeps the roots too wet and reduces airflow.
  • Humidity: New fronds expand with fewer dry edges in moderate humidity. Use a humidifier, grouped plants or a bright vitrine in dry heated rooms.
  • Temperature: Keep stable indoor warmth, ideally around 16–25 °C. Protect the plant from cold windowsills during winter nights.
  • Feeding: Apply a weak fertiliser during active growth. Flush the pot occasionally if tap water or fertiliser leaves mineral residue.
  • Pot choice: Use a pot with drainage and empty standing water after watering. The crown should remain visible above the mix.
  • Repotting: Repot only when the substrate is tired or the roots fill the pot. Keep the new pot only slightly larger.
  • Grooming: Remove old outer fronds at the base with clean scissors. Handle new fronds carefully while they are still soft.

Asplenium antiquum 'Osaka' troubleshooting

  • Brown edges: Check for dry air, inconsistent watering or salt build-up. Adjust moisture gradually and rinse the substrate if needed.
  • Crown spotting: Trapped water or old debris may be sitting in the centre. Improve airflow and keep watering to the substrate.
  • Flattened new fronds: Light may be too low or the crown may be crowded. Give brighter filtered light and keep the centre clear.
  • Yellowing lower fronds: Older outer fronds can age naturally, but several yellowing fronds at once point to poor drainage or overwatering.

Asplenium antiquum 'Osaka' crown growth

The rosette needs space for each new frond to expand without pressing against older fronds. Rotate the pot occasionally so light reaches all sides, and keep conditions steady once the plant has settled. Watch for fronds that emerge distorted, spotted or soft at the base, as these can point to crown moisture or debris.

Asplenium antiquum 'Osaka' household safety

Asplenium antiquum 'Osaka' is generally treated as a non-toxic ornamental fern. Keep it away from repeated chewing, and remove fallen debris from the crown so new fronds can expand cleanly.

Asplenium antiquum 'Osaka' name and botanical background

The genus name Asplenium comes from the historic spleenwort name. The species epithet antiquum means ancient or old in Latin.

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SKU: 1783563276

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B
B. Clark
Omaha, US
★★★★★ 5
2 prong to 3 prong power strip. Devices share common ground bus. Green light on switch. Compact plug
Size: 5FT, Color: White 2prong, Size: 5FT, Color: White 2prong
This power strip has no ground. It allows you to plug a 3 prong device into the strip which has a 2-prong plug going into your outlet. You'll want to make sure you understand the implications of that if you use this. For my use I'm using the power strip to have the convenience of using my 3 prong extension cords for ungrounded devices. The power strip is composed of the main body with 11 outlets plus 3 USB and 3 USB-C ports. There's a switch to turn on or off the power switch and the switch has a green light when turned on. On the back side are holes for optional surface mounting as well as the power ratings. The USB ports are all standard 5V ports. While the ground plug on the 3-prong outlets is not connected through the power cord the outlets on each side share a common bus on the power strip itself. Thus if any device plugged in on that side has power going into the ground prong it will energize the ground on all devices connected with a ground prong on that side. The body measures approximately 8.125" by 4.125" by 1.25" thick. I weighed the power strip with cord at 15.38 ounces. The power cord is approximately 4.9' long with a compact right angle plug. The plug is polarized meaning you cannot plug it in inside down. Looking at a 3-prong plug if the ground prong is at the bottom the cord goes down to the right at about a 45 degree angle. The plug is compact and you can plug 2 of these in on the same 2 outlet wall outlet. The cord is printed with the wire information and contains 2 16 AWG conductors. The rated power seems appropriate for the size of the power cord. The outlet looks and feels nice and handles a lot of devices.
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Reviewed in the United States on May 20, 2026
R
Richard S.
Cuba, US
★★★★★ 5
Good value for a high quality product with some possible safety compromises
Size: 5FT, Color: White 2prong, Size: 5FT, Color: White 2prong
This power strip is a practical solution for anyone living in an older home that still has two‑prong outlets. Many older houses were built long before grounded wiring became standard, so finding a way to expand your available outlets without rewiring the entire room can be a challenge. This adapter is designed specifically for those situations, and it provides a surprising amount of capability in a compact unit. Before using it, I wanted to be sure it was safe to plug a three‑prong device into a two‑prong outlet. It is legal to use an adapter like this in the United States, but only when you understand its limitations. A two‑to‑three‑prong adapter does not create a true ground. The product page notes that this model is built to UL 1363 standards and includes surge and overload protection, which helps add a layer of safety for older outlets. Still, it is not a substitute for proper grounding, and anyone who wants full protection should eventually have an electrician install grounded outlets. As for the device itself, it is well designed and easy to use. The main body includes 11 outlets, along with 3 USB ports and 3 USB‑C ports for charging phones, tablets, and other small electronics. All USB ports are standard 5V. There is a power switch with a green indicator light, and the back of the unit includes mounting holes if you want to secure it to a wall or desk. The size is compact—about 8 inches long, 4 inches wide, and just over an inch thick—so it fits neatly in tight spaces. Overall, this is a good value for anyone who needs more outlets and charging options in a home with older two‑prong receptacles. It offers convenience, versatility, and thoughtful safety features in one organized unit.
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Reviewed in the United States on May 24, 2026
N
NewsFlash
Phoenix, US
★★★★★ 4
Great many outlets but insufficient usb power for most needs
Size: 5FT, Color: White 2prong, Size: 5FT, Color: White 2prong
I absolutely LOVE how many ports/outlets this extension unit has. It has usb-As, usb-Cs, AC outlets, on/off switch... In that regard, it's perfect. But. If you're looking to charge your phone or laptop, for example, by plugging your charging cord without an adapter, directly into a usb-c or usb-a port, you'll be completely out of luck. When I first got this I plugged in my laptop cord directly into one the usb-c ports while using it. I eventually, fairly quickly I must say, realized that it was as though the laptop wasn't plugged in at all. It even seemed to lose power faster than if it weren't plugged in! And, it was the only thing plugged in at the time. So it might just be me expecting a charge instead of the opposite, but the issue stands. I had to go and find my A/C adapter and charge my laptop the same way I would without this unit, as if I was plugged into the wall. Now I'm sure there are people out here surprised that anyone would be confused by having to use an adapter to charge a phone or laptop while using this unit. My confusion comes from the unit having as many usb-c and usb-a ports as it does. I don't think it's a stretch to assume, as I did, that the point of having so many ports is to actually use them. One reason I haven't rated this lower is that I knew of the ports low voltage and wattage, so I wasn't completely surprised by having to use an adapter, though I WAS surprised by how completely useless the usb ports seem to be. Also, one description picture shows a phone being charged WITHOUT an adapter. And this does charge my phone but only if I'm not using it. It stays at pretty much the same battery level if I'm using it while charging it. So I don't think I'm 100% at fault for being surprised If you will be using the usb ports to charge a small appliance, a groomer, a shaver, a toothbrush? I'm sure this will do well. I don't have any of those so I guess I won't be using the usb ports at all or will use them only if I'm not in a rush to get a fast charge. Once the initial surprise subsided, I'm still glad I got this. It has ELEVEN A/C outlets, a flat plug that can fit just about anywhere and behind any piece of furniture, and I could still charge my phone (thought not my laptop) in a pinch. I think the price at the time of this review is fine for those features. 3.5 stars.
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Reviewed in the United States on May 21, 2026
B
Bobby A
Houston, US
★★★★★ 5
Many Outlets in One Compact Device!
Size: 5FT, Color: White 2prong
The number of outlets is impressive for its size, and the USB ports are super convenient for phones, tablets, and other small devices. Everything charges steadily without overheating, and the 5 ft cord gives enough flexibility to place it where I need it. I also really appreciate the compact design. Even with so many plugs available, it doesn’t feel bulky or cluttered. It fits nicely behind furniture and keeps everything organized instead of having a mess of adapters everywhere. It’s especially perfect for older homes or apartments with only a couple of outlets per room. While it’s not a substitute for true grounded outlets for heavy appliances, it works perfectly for everyday electronics. These items are typically fine: Phone chargers Laptops LED lamps Routers / modems TVs (modern, low draw) These devices are double-insulated or low risk, so they don’t rely heavily on grounding. Avoid using this for: Space heaters Air conditioners Microwaves Refrigerators Power tools Anything metal-bodied or high-power Without a real ground, a fault could energize the casing and increase shock risk. Overall, this is a solid, reliable, and incredibly convenient power strip. I’d definitely recommend it to anyone needing more outlets and USB charging in one simple solution for appliances motioned above that are safer to use with relatively better price.
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Reviewed in the United States on June 1, 2026
C
Celeste
Lowell, US
★★★★★ 5
Perfect Sofa-Side Charging Hub
Size: 5FT, Color: White 2prong, Size: 5FT, Color: White 2prong
I picked this power strip mainly to use next to my sofa, where I usually charge my tablet, phone, and laptop while relaxing in the evening. Having 11 AC outlets and multiple USB ports in one place has made that corner much more organized, and I no longer have chargers scattered everywhere. The layout is well thought out. Larger plugs don't block neighboring outlets, and the flat angled plug fits nicely behind furniture. The 5-foot cord gives enough flexibility to position the strip where it's most convenient. I also like having both USB-A and USB-C ports available for smaller devices. For phones, tablets, earbuds, and similar electronics, the built-in USB ports have been very useful. For my everyday use, charging personal devices and powering small electronics, the unit has performed as expected. The overload protection switch and built-in safety features provide additional peace of mind. Overall, this has been a practical solution for adding more outlets to an older two-prong receptacle while keeping my charging area tidy and easy to access.
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Reviewed in the United States on June 2, 2026

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