varieties may be used for landscape purposes. However, certain
varieties are more suited to certain landscape conditions than
excel table). The following guidelines will aid the
commercial landscaper to successfully incorporate caladiums into
Caladium bulbs may be successfully planted in the landscape
throughout the tropics, subtropics and temperate climates of the
world. In subtropical and temperate regions caladiums should be
planted after the last frost in the spring when night
temperatures are greater than 50 F. To jump-start the effect on
the overall display, landscapers may choose to transplant either
pre-finished or finished caladiums into their displays. When
doing this make sure that the plants have been grown under the
proper light to avoid excessive stress and sun burning in the
No special treatments are recommended. Proper variety selection
appropriate to the site of installation is key (see below).
No special treatments are recommended. Proper
variety selection appropriate to the site of installation is key
Bulbs should be covered with at least 1 ½ to 2 ½ inches of
soil. This will ensure adequate soil moisture around roots as
they emerge from the top of the bulb.
A well-drained soil is very important, as
performance will be severely hampered in saturated soil
Caladiums like water therefore be sure they are planted in an
area that receives adequate irrigation so that they are kept
The most common diseases are Fusarium and Pythium.
The main symptom is root rot. Use fungicides such as Medallion
to control Fusarium and Subdue to control Pythium.
A fungicide drench should be applied 1-2 weeks after planting to
control these fungal pathogens.
Make sure that bulbs are not stored at
temperatures below 60°F (16°C), or above 90°F (32°C). Injury
due to temperature exposure manifests itself in stunted
(sometimes very slow) erratic growth even though the bulb does
not show any injury at all.
White and pink cultivars that have been grown during cloudy,
early spring days and are suddenly exposed to high light
intensity might show brown blotches on the leaves. In landscape
plantings, we recommend keeping beds adequately moist to reduce
sunburn and choose varieties appropriate to the planting site.
A bacterial leaf spot may occur that is caused by a bacterial
pathogen known as Xanthomonas. To prevent damage due to
Xanthomonas, be sure plants are well spaced, that they
receive plenty of air circulation and keep the foliage dry at
night. Improper nutrition can also cause spotting of the
A pH higher than 7.0 is also known to cause brown spots.
Pink areas in
white cultivars like White Christmas usually are a stress
related symptom. High temperatures (>100°F) can induce this
tolerate a wide range of light intensities. Some varieties
perform quite nicely under continuous full sun conditions while
others should be planted in partial (2-4 hours of full sun/day)
or full shade. In the north (temperate climate) caladiums can
stand more sun than in the south because of cooler night
In order to get continual growth after
sprouting, caladiums should be fertilized. In sandy regions of
the country, such as much of Florida, a good slow release
complete fertilizer (Osmocote, Nutricote or other slow release)
seems to work best.