Photo by Melody

PlantFiles: Light Bulb Clerodendrum
Clerodendrum smithianum

Family: Lamiaceae (lay-mee-AY-see-ee) (Info)
Genus: Clerodendrum (kler-oh-DEN-drum) (Info)
Species: smithianum

One vendor has this plant for sale.

6 members have or want this plant for trade.

Tropicals and Tender Perennials
Vines and Climbers

4-6 ft. (1.2-1.8 m)
6-8 ft. (1.8-2.4 m)
8-10 ft. (2.4-3 m)
10-12 ft. (3-3.6 m)

24-36 in. (60-90 cm)
36-48 in. (90-120 cm)

USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)
USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:
Partial to Full Shade
Full Shade

Unknown - Tell us

Bloom Color:
White/Near White

Bloom Time:
Late Winter/Early Spring
Late Fall/Early Winter
Mid Winter


Other details:
This plant is attractive to bees, butterflies and/or birds
Average Water Needs; Water regularly; do not overwater
Suitable for growing in containers

Soil pH requirements:
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)

Patent Information:
Unknown - Tell us

Propagation Methods:
From semi-hardwood cuttings

Seed Collecting:
Unknown - Tell us

Click thumbnail
to view:

By popper1
Thumbnail #1 of Clerodendrum smithianum by popper1

By popper1
Thumbnail #2 of Clerodendrum smithianum by popper1

By xtolord
Thumbnail #3 of Clerodendrum smithianum by xtolord


2 positives
No neutrals
No negatives

Gardeners' Notes:

Positive Ng68 On Jan 5, 2011, Ng68 from Austin, TX wrote:

Indeed it's a very rare plant. I searched all over the web for info but found only 2 sites one being DG and the other where I bought the plant. I bought the plant from rare flora website and it reached me very safely in the winter. But the calyces are not as showy as shown in the pics. Mine are just pale green with small white flower bulbs. I was wondering if this is an other species or will it take for a while to grow to show the true colors. If anyone has any more info on this plant pls post.

Positive popper1 On Dec 28, 2009, popper1 from Lakeland, FL (Zone 10a) wrote:

This is a very rare Clerodendrum, very hard to find, but so worth the effort. Looks much like Clerodendrum thomsoniae in growth habit. The white flowers are like many other Clerodendrum flowers with long, protruding anthers and style. What is different is the flower buds, they look like little light bulbs hanging on the inflorescence. The flowers are plentiful, widely spaced on the numerous, wiry inflorescences. A very cool plant.


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

Delray Beach, Florida
Fort Lauderdale, Florida
Lakeland, Florida
Mulberry, Florida
Tampa, Florida
Austin, Texas

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