| Material Information
||Fertilizing Ficus lyrata 'Compacta'
||CFREC-Apopka research report
||2 p. : ; 28 cm.
||Chase, A. R ( Ann Renee )
Central Florida Research and Education Center--Apopka
||University of Florida, IFAS, Central Florida Research and Education Center-Apopka
||Place of Publication:
||Ficus (Plants) -- Fertilizers -- Florida ( lcsh )
Ficus (Plants) -- Growth -- Florida ( lcsh )
||government publication (state, provincial, terriorial, dependent) ( marcgt )
bibliography ( marcgt )
non-fiction ( marcgt )
||Includes bibliographical references (p. 2).
||Statement of Responsibility:
| Record Information
||University of Florida
||All rights reserved by the source institution and holding location.
||oclc - 70949029
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Fertilizing Ficus lyrata 'Compacta'
Central Science A. R. Chase'
Library University of Florida, IFAS
Central Florida Research and Education Center Apopka
9 IQR! CFREC-Apopka Research Report, RH-88-3
UnivcTrsithy ie fertilizer recommendation for production of acclimatized Ficus
--.lyrata 'Compacta' (fiddle-leaf fig) is approximately 2000 lb
nitrogen/A/year under 4000 to 6000 ft-c natural light (2). Rates for lower
light intensities are not given but presumably would be lower since Ficus
would not grow as rapidly or utilize as much water under low light
conditions. The effect of nitrogen and potassium rate on growth of
fiddle-leaf fig in a greenhouse under relatively low light levels was
tested to determine the relative important of these elements to plant
Tissue-cultured 'Compacta' fiddle-leaf fig were obtained directly from
a laboratory. Single 4-inch tall plants were established in steam-treated
Canadian peat and pine bark (1:1 by volume). The medium was amended with 7
lb dolomite and 1.0 lb Micromax (micronutrient source from Sierra Chemical
Co.) per cubic yard of medium. The test was performed in a glasshouse with
temperatures from 65 to 90F and a maximum natural light level of 1500
ft-c. Fiddle-leaf fig were grown for 2 months with three levels each of
nitrogen (from NH4NO ) and potassium (from KC1). Treatments were applied
) at 100 ml per pot each watering period (no additional water was supplied).
A factorial experiment was used with three rates of each nutrient and a
single level of phosphorous (280 ppm/wk from H3PO4). The levels for
nitrogen were 720, 2160 and 3600 ppm per week per 5" pot. The levels of
potassium were 780, 2340 and 3900 ppm. Fertilizer was applied with each
irrigation twice a week. Soluble salts of potting medium leachate, plant
height and number of leaves were recorded monthly with plant quality rated
at the end of two months. Top quality was graded on the following scale: 1
(dead, unsalable), 2 (poor quality, unsalable), 3 (marginally salable), 4
(good quality, salable), and 5 (excellent quality, salable).
Plant height was not affected by these treatments although number of
leaves decreased as nitrogen level increased (Table 1). Plant top quality
also decreased as nitrogen rate increased but was not affected by potassium
rate. Leachate soluble salts which corresponded to good quality plants
were between 2000 and 5000 pmhos/cm. Higher levels resulted in reduced
plant growth or quality (Table 1).
Overfertilizing fiddle-leaf fig reduces both number of leaves and
overall plant quality. Since nitrogen level was responsible for this
reaction the overall rate of nitrogen in a fertilizer would be more
important than the proportion of nitrogen to other elements. Previous
research using Osmocote 19:6:12 also demonstrated the negative effects of
supplying excessive levels of fertilizer to fiddle-leaf fig (1).
1Associate Professor of Plant Pathology, Central Florida Research and
Education Center Apopka, 2807 Binion Road, Apopka, FL 32703.
Application of 720 ppm of nitrogen per week should produce high quality
1. Chase, A. R. 1987. Pseudomonas leaf spot of Ficus lyrata 'Compacta'.
Foliage Digest 10(9):1-2.
2. Conover, C. A., and R. T. Poole.
recommendations for production of
Foliage Digest 7(8):1-6.
Table 1. Effect of nitrogen and potash
and leachate soluble salts.
1984. Light and fertilizer
potted acclimatized foliage plants.
isium rates on growth of Ficus lyrata
soluble No. height Plant
salts pmhos/cm leaves (inches) quality
Treatment 2 Feb 2 Feb 2 Feb 30 Jan
720 3017**C 10.9* 3.8ns 3.6**
2160 6643 10.0 4.1 3.3
3600 8840 9.6 4.0 2.8
780 5059 10.3ns 4.0ns 3.4
2340 6244 10.2 3.8 3.2
3900 7198 10.0 4.1 3.1
aPhosphorus was supplied at 280 ppm/wk from H PO for each treatment.
Plant quality was graded from 1 (dead plant) to 5 (excellent plant).
cSignificant effects were evaluated using analyses of variance and denoted
as significant at the 1% (**) or 5% (*) level or not significant (ns).
Interactions were not significant.