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PlantFiles: Philodendron
Philodendron holtonianum

 
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Family: Araceae (a-RAY-see-ee) (Info)
Genus: Philodendron (fil-oh-DEN-dron) (Info)
Species: holtonianum

3 members have or want this plant for trade.

Category:
Tropicals and Tender Perennials
Vines and Climbers

Height:
8-10 ft. (2.4-3 m)

Spacing:
18-24 in. (45-60 cm)

Hardiness:
USDA Zone 11: above 4.5 °C (40 °F)

Sun Exposure:
Sun to Partial Shade
Light Shade

Danger:
All parts of plant are poisonous if ingested
Handling plant may cause skin irritation or allergic reaction

Bloom Color:
Inconspicuous/none

Bloom Time:
N/A

Foliage:
Grown for foliage
Evergreen
Blue-Green
Shiny/Glossy-Textured
Veined

Other details:
This plant is suitable for growing indoors
Average Water Needs; Water regularly; do not overwater
This plant may be considered a protected species; check before digging or gathering seeds
Provides winter interest
Suitable for growing in containers

Soil pH requirements:
5.1 to 5.5 (strongly acidic)
5.6 to 6.0 (acidic)

Patent Information:
Non-patented

Propagation Methods:
From herbaceous stem cuttings
By air layering

Seed Collecting:
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

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Profile:

1 positive
1 neutral
No negatives

Gardeners' Notes:

RatingAuthorComment
Neutral Joan On May 4, 2009, Joan from Belfield, ND (Zone 4a) wrote:


Editor's Note

Some resources list all parts of Epipremnum, Pothos, Philodendron and Scindapsus as poisonous if ingested. The toxic principal is calcium oxalate crystals. Symptoms include burning and swelling of lips, mouth, tongue, and throat, also diarrhea. Reportedly toxic only if large amounts are eaten.

The plant can also cause skin irritation upon contact. Irritation is said to be minor and only lasts for a few minutes.

We tend to err on the side of caution in PlantFiles, and the danger notation in the details above is to caution gardeners, parents and pet owners to look further for more information.
Positive ExoticRainforest On Feb 12, 2008, ExoticRainforest from Siloam Springs, AR wrote:

In a personal email from Dr. Tom Croat of the Missouri Botanical Garden, he explained he does not believe this specimen is the actual plant described as Philodendron holtonianum in science. This is a quote from his email, "I am calling it P. holtonianum but it may in fact be an un described species."

The plant changes dramatically as it climbs and becomes substantially fuller with a much thicker and wider blade and lobes. Until further scientific study is concluded, Dr. Croat does call the plant Philodendron holtonianum but only in the non-italicized form.

Regional...

This plant has been said to grow in the following regions:

Miami, Florida



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