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Group Title: Research report - Bradenton Agricultural Research & Education Center - GC1976-2
Title: Factors to consider in growing high quality gladiolus flowers
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Permanent Link: http://ufdc.ufl.edu/UF00067694/00001
 Material Information
Title: Factors to consider in growing high quality gladiolus flowers
Series Title: Bradenton AREC research report
Physical Description: 1 leaf : ; 28 cm.
Language: English
Creator: Magie, R. O ( Robert Ogden ), 1906-
Wilfret, Gary J
Agricultural Research & Education Center (Bradenton, Fla.)
Publisher: Agricultural Research & Education Center, IFAS, University of Florida
Place of Publication: Bradenton Fla
Publication Date: 1976
 Subjects
Subject: Gladiolus -- Growth -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
non-fiction   ( marcgt )
 Notes
Statement of Responsibility: R.O. Magie and G.J. Wilfret.
General Note: Caption title.
General Note: "January 1976."
Funding: Florida Historical Agriculture and Rural Life
 Record Information
Bibliographic ID: UF00067694
Volume ID: VID00001
Source Institution: Marston Science Library, George A. Smathers Libraries, University of Florida
Holding Location: Florida Agricultural Experiment Station, Florida Cooperative Extension Service, Florida Department of Agriculture and Consumer Services, and the Engineering and Industrial Experiment Station; Institute for Food and Agricultural Services (IFAS), University of Florida
Rights Management: All rights reserved, Board of Trustees of the University of Florida
Resource Identifier: oclc - 72521718

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HISTORIC NOTE


The publications in this collection do
not reflect current scientific knowledge
or recommendations. These texts
represent the historic publishing
record of the Institute for Food and
Agricultural Sciences and should be
used only to trace the historic work of
the Institute and its staff. Current IFAS
research may be found on the
Electronic Data Information Source
(EDIS)

site maintained by the Florida
Cooperative Extension Service.






Copyright 2005, Board of Trustees, University
of Florida




9e-

AGRICULTURAL RESEARCH & EDUCATION CENTER
IFAS, University of Florida
Bradenton, Florida

FACTORS TO CONSIDER IN GROWING HIGH QUALITY 'GLADIOLUS FLOWERS
R. 0. Magie and G. J. Wilfret

Bradenton AREC Research Report GC1976-2 January 1976

If the "best" gladiolus flower is the show table winner that remains in good
condition for the longest period after being cut in tight bud and held in water, we
would suggest the following environment: a) full sun with daylength of 14 hours or
more, b) between 57-610F (14-160C) at night and 75-800F (24-270C) during the day,
c) moderate morning and evening winds and d) a moderate relative humidity.
We can not order those environments but we can modify the soil environment. We
suggest moderately fertile or good soils which are "loose" and well aerated and rel-
atively free of pests and diseases. Gladiolus plants should not be followed by glad-
iolus within a period of 5 to 8 years unless the soil is fumigated. Fumigants that
control fungi as well as nematodes are suggested. Of the several excellent fumigants
available, Mylone (DMTT), a granular material, requires no special application equip-
ment and is most convenient for small areas.
Maintaining a moderate soil moisture under a mulch is important, especially with
larger corms. Try to hold a lower'soil moisture for the first 6 weeks after planting
large corms than is needed for the flowering period. Best corm health and root growth
results when good soil aeration is maintained during at least the first 2 months of
growth. Planting corms in a raised bed helps to aerate and ventilate the soil and
avoid compaction. A good organic mulch also helps to keep the soil surface from
"sealing" during rains and facilitates penetration of air and water. An example of
such a mulch is straw. Water impervious mulches such as aluminum foil and plastic
films are vulnerable where the fertilizer is applied before planting. Such a mulch
is laid on the sides of the row soon after plants emerge.
Almost any type of soil is suitable provided it is well drained and well tilled
until "fluffy". Soil pH should be about 6.5 to 7.0. Higher and lower readings are
suitable under certain conditions. At higher pH readings a chelated iron fertilizer
and manganese and zinc (mancozeb) sprays should be used. Use of dolomitic limestone
is advisable where needed to raise pH and supply calcium. Where pH is high enough,
calcium sulfate (gypsum) may be used to supply generous amounts of calcium without
raising the pH.
Where necessary, minor elements are added to the fertilizer to supply the iron
and boron needed by gladiolus. Manganese and zinc are usually supplied by way of
mancozeb (Manzate, Dithane, etc.) sprays applied to control leaf spot diseases such
as those caused by Stemphylium, Botrytis, Curvularia, and Septoria fungi. The major
elements (N, P and K) should be in good balance such as 6-6-6, preferably with most
of the nitrogen in the nitrate form. Only a moderate to low fertility level is needed
for plantings of large corms with good, healthy root systems. The nitrogen may be
supplied in a slowly available form, such as Osmocote or organic (manures). Neither
organic nor inorganic fertilizers should be applied under the corms or cormels. Good
results are obtained where fertilizers are well mixed into the soil before planting,
or applied periodically on the sides of raised beds and covered with soil as the roots
advance toward the edges of the bed. With the latter system the bed is made wider at
each fertilization.
Ideal weather and ideal soil conditions may not produce high quality flowers if
the corms carry diseases. All corm stocks tested for diseases were found to carry
Fusarium and virus infections, along with less pathogenic fungi and bacteria, even
though they appeared to be healthy. These infections generally account for the var-
iability in blooming dates among corms of uniform size. The late bloomers are gen-
erally found to carry latent infections of Fusarium.




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