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Description
philodendron radiatum juvenile Philodendron radiatum – Foliage FactoryPhilodendron radiatum Philodendron radiatum is a climbing Araceae species from Mexico to Colombia. Young plants can carry simpler leaves, while mature climbing growth develops deeply divided blades with radiating segments. The mature leaf form appears gradually as the stem gains height on support. Bright indirect light, warmth, steady moisture and an airy root zone help the plant move from juvenile foliage into its more divided adult shape.
Philodendron radiatum
Philodendron radiatum is a climbing Araceae species from Mexico to Colombia. Young plants can carry simpler leaves, while mature climbing growth develops deeply divided blades with radiating segments.
The mature leaf form appears gradually as the stem gains height on support. Bright indirect light, warmth, steady moisture and an airy root zone help the plant move from juvenile foliage into its more divided adult shape.
Philodendron radiatum juvenile leaves and mature divided blades
- Family: Araceae, the aroid family.
- Leaf development: Juvenile leaves are simpler than the mature divided blades.
- Mature foliage: Adult leaves develop deep cuts and radiating segments.
- Growth habit: Wet-tropical climber that grows best on a stable pole or board.
- Range: Native from Mexico to Colombia.
- Indoor growth: Mature leaf division takes time, vertical support, bright indirect light and an airy substrate.
- Growth rate: Usually moderate in warm, bright, humid conditions, with slower growth during cooler darker periods.
How young Philodendron radiatum leaves become divided
Philodendron radiatum shifts from simpler juvenile blades to deeply divided adult leaves. Early foliage can stay plain while the plant is still young, and stronger segmentation appears as the climbing stem matures.
In habitat, Philodendron radiatum grows in wet tropical forest, where climbing stems develop in warm, humid, filtered-light conditions. Indoors, a vertical support gives the stem a stable route upward and helps the divided leaves expand with less crowding.
Philodendron radiatum care for divided climbing growth
- Light: Bright indirect light supports steady growth without scorching the divided blades.
- Water: Water when the upper part of the substrate has started to dry; heavy wet soil can damage the roots.
- Humidity: Moderate to high humidity keeps expanding divided leaves from catching or tearing during unfurling.
- Temperature: Keep warm and stable, with protection from cold draughts.
- Substrate: Use a chunky, airy aroid mix that drains quickly but does not dry out completely between waterings.
- Support: A moss pole, board or similar vertical surface keeps the stem upright as it lengthens.
- Space: Leave room around the support so mature divided blades do not rub against walls or neighbouring plants.
- Repotting: Repot when roots fill the pot, the mix has compacted or the support no longer suits the stem height.
- Fertilising: Feed lightly during active growth; reduce feeding when growth slows.
- Propagation: Root stem cuttings with at least one node in warm humid conditions and an airy propagation medium.
- Pruning: Remove damaged leaves at the petiole base or shorten an overlong stem above a healthy node.
- Semi-hydroponics: Semi-hydro is possible with adapted roots and a clean, oxygenated mineral substrate.
Leaf damage, simple leaves and root stress in Philodendron radiatum
- Simple leaves: Juvenile plants and unsupported stems often produce less divided foliage.
- Mechanical damage: Deeply cut blades can tear where they rub against hard surfaces or neighbouring plants.
- Root rot: Dense wet substrate can cause yellowing, weak growth and root loss.
- Leaf scorch: Direct sun can mark the thin edges of divided mature leaves.
- Pests: Inspect new leaves, petioles and leaf undersides for thrips, spider mites, mealybugs and scale.
Philodendron radiatum toxicity for pets and children
Philodendron radiatum contains irritating calcium oxalate crystals. Keep it away from pets and small children, especially where leaves or stems could be chewed.
Botanical background of Philodendron radiatum
Philodendron was published by Heinrich Wilhelm Schott in Wiener Zeitschrift für Kunst, Litteratur, Theater und Mode 3: 780 in 1829, and the genus name comes from Greek-derived roots meaning “tree-loving.” Philodendron radiatum was described by Heinrich Wilhelm Schott and published in Oesterreichisches Botanisches Wochenblatt 3:378 in 1853. The epithet radiatum means radiating or ray-like, referring to the mature leaf divisions that spread from the blade.
A climbing Philodendron with juvenile-to-adult leaf change, deeply divided mature blades and a radiating leaf outline on support.
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4.3 ★★★★★
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Product Reviews
★★★★★ 5
Great watch
Color: Black/Silver-Tone
Great watch, with many features, specially for those that travel in various time zones.
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Reviewed in the United States on May 7, 2026
★★★★★ 4
Typical Ironman quality
Color: Black/Silver-Tone
This is my fourth Timex Ironman watch. I own many watches, and prefer the Ironman for casual wear and sporting activities as well as swimming and snorkeling. I decided to replace an earlier model with this one rather than pay to change the battery.
The Ironman has changed very little over the years since its introduction in the '80s, with the exception of cosmetic improvememnts and a larger display. I selected the "oversize" model as I was looking for a little more heft to this model. This watch fits the bill, not as chunky as my G-Shock. A pleasant surprise was the weight of the watch. This model is lightweight, another advantage over the G. It's larger than the typical Ironman model, but about the same weight. The band lacks the stiffness of some other Timex and Casio models, and is quite comfortable.
Typical Ironman functions are unchanged, and the ability to "hide" various functions makes operation of the watch more efficient. There are three time zones, useful when traveling, as well as the usual chronograph/timer and alarm functions.
I haven't worn the watch in the pool or ocean yet, but if experience is any guide, I expect no problems. I've never had an Ironman leak, whether during water sports or snorkeling.
These are great watches for the money. I prefer 200 meter water resistance for this type of watch, but Timex has yet to build an Ironman 200m that doesn't overwhelm my wrist in weight and size. I'm not a big guy, and they are simply too large for my wrist.
Looking forward to years of service with this watch. Definitely a good timepiece for the price.
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Reviewed in the United States on May 6, 2013
★★★★★ 5
Will not be disappointed
Color: Black/Blue
Keeping in mind that I received this item yesterday (2/24/16), I absolutely love this watch. The reason I have so much confidence with this watch is because I've owned one other Timex similar to this one, and it served me extremely well and is still able to do so. First off, this watch is certainly aesthetically pleasing. The blue color around the face of the watch and outline in the band, goes really well with the black frame. It's just an overall nice looking watch. More importantly, the quality seems great. As I mentioned, I've owned a Timex expedition, which I've had for more than 2 years, and it's still working perfectly fine. The watch seems like it's put together very well and there's no loose or flimsy parts. One complaint that many people seem to have with Timex is the quality of their band. Unfortunately I'd have to agree, since the band on my other Timex that's still working like the first day I got it, cracked and broke and is only being held together by the nylon fabric on the other side of the band. You're not going to have that problem with this watch. It's a full nylon band with Velcro adjustment, for precise fitting. it feels extremely comfortable and you won't need to worry about the band cracking (although I'm sure there will be certain defects in a mass produced bunch). I will use this watch for work and running, and rarely plan on taking it off. Just to give you an idea, I also have a garmin gps watch that I love and obviously has more functions than this watch. However, the second I received this watch, I slapped it on and put my garmin to the side. This watch also looks amazing when you wear it. I'll update this feedback as needed, but I'm confident this watch will serve me for years to come, just as my other one has.
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Reviewed in the United States on February 25, 2016
★★★★★ 5
Greatest watch I've ever had, but changing batteries is near impossible
Color: Black/Blue
This is the 3rd time I've bought this watch. Same brand, same or very similar model. It has a chronometer, timer, alarm, and of course the clock. It has something I think is for "occasions" but I don't know what it does and don't really care about it. The watch is durable. It uses battery power efficiently. The indiglo is second to none. I just really really like this watch.
Having said all that, if you want to change the batteries, good luck, you'll need it. Once you manage to get the backing off of it and open it up (which is a little tricky in itself), it's like a comedy routine where you see some stooge open an electrical device and a buncha parts and springs go flying everywhere. And of course, they are so tiny, you'll never find them once they fly out. That was the exact scenario I found myself in the last time I tried to change the battery. It made me so mad I actually bought another brand of watch that I thoroughly researched. But that watch DIDN'T use battery power efficiently, and it had a host of other minor problems that added up to the conclusion that it was not nearly as great as this Timex. So, for the 3rd time, I found myself buying this Timex watch.
So it's a wonderful watch in every way except longevity because changing the batteries has historically been a nightmare for me.
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Reviewed in the United States on December 4, 2019
★★★★★ 5
A better Ironman design
Color: Black/Blue
I've been a fan of Timex watches for most of my life, paying about $30 for one in the 1960s, and that hasn't changed at all in 2010 because I'm still paying about $30 for my Timex watches. It is a rare case indeed when the quality of a product continually improves over several decades while the price remains the same. And as John Cameron Swayze would say in those live ads during the early years of TV, "Timex takes a lickin and keeps on tickin".
The MEGA deserves a good review after I have been using it for a while. You might also see it advertized as the "Oversize" because most distinctive about this design is its size, so tagging it with the name MEGA is entirely justified. It is massive in comparison to most of the other Ironman series of watches, and what seemed at first to be just another unnecessary Ironman 30 Lap design has turned out to be one of my favorites for all-around wearing. This new design keeps the clockworks of the standard size 30 Lap Ironman watches, it counts up and down, programs the same, has several alarms, and of course, it has the Indigo night light that works so well.
This is one of five different versions of the Mega available in the USA, and the only one with a Fastwrap Velcro wristband with blue striping and a matching blue bezel. Velcro wristbands are a favorite among many athletes and when it wears out, it can be replaced with either an identical factory band or one that is made of urethane rubber.
Overall, the Mega is a good choice for runners in need of a new 30 lap Ironman who can appreciate having a watch that is distinctively larger and what I would consider to be much better in appearances over the others of standard or mid size Ironman dimensions.
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Reviewed in the United States on November 17, 2010