David Holden has over 35 years of experience conducting agricultural research. A study he conducted found that using Grower's Secret Professional at 4 drops per gallon significantly increased tomato yields compared to the standard practice. Treatments with Grower's Secret applied as a drench at planting and as foliar sprays saw a 44% increase in yields. When combined with fertilizer, yields increased by 52%. This could translate to a potential $1,690 per acre increase in profits for tomato growers. David was surprised by these results from such a low application rate of 4 drops per gallon.

1. Grower’s Secret PROFESSIONAL
TOMATOES
09.10.2012
Research by Dr. David Holden
Holden Research and Consulting
(Preliminary report)

2. “These are some amazing numbers. Very hard
to believe this is from 4 drops per gallon of
spray water! ”
David Holden
Holden Research and Consulting

3. Who is David Holden?
•Consultant to growers, manufacturers, crop commissions and
distribution.
•Holden Research & Consulting specializes in production related
field research in traditional and organic farming with nutrients
and pest management.
•Over 35 years of experience as an agronomist and Pest Control
Advisor (PCA).
•Has completed over 1,000 field research projects on over 100
crops for a variety of agricultural manufacturers.
•Currently consulting on approximately 10,000 acres for
growers of avocados, berries citrus, field grown vegetables,
and wine grapes.

4. Significant Increase in Marketable Yields
Grower’s Secret PROFESSIONAL (GSP)
Data Indicates Significant Increase in Tomato Yields
Summary from David Holden….
• Standard Practice = 0%
• Standard Practice + GSP drench at planting = 39% increase
• Standard Practice + GSP drench and single post transplant spray = 26%
increase
• Standard Practice + GSP drench and four post transplant sprays = 44%
increase
• Standard Practice + GSP drench and four post transplant sprays with
3-18-18 = 52% increase
Preliminary report

5. TEST PARAMETERS
• CROP: Summer tomatoes (Transplants)
• LOCATION: Ventura County, California
• DESIGN: Randomized complete block
• PRODUCT: Grower’s Secret Professional (1 fl. oz./a)
• WATER VOLUME: Foliar, 25 to 100 gal/acre
(depending on plant size)
• PLOT SIZE: 100 sq. ft.

6. TREATMENTS
Trt Treatment Rate Other Other
Applicat
ion
Application Spray Volume Comment Comment
No. Name Unit Rate Rate Unit Code Description Volume Unit 1 2
1 Standard Fertility
2 Standard Fertility
Grower's Secret
Professional
4
drops/gallon
drench
A Drench transplants
1 gal/tray (app 250
plant
3 Standard Fertility
Grower's Secret
Professional
4
drops/gallon
drench
A Drench transplants
1 gal/tray (app 250
plant
Grower's Secret
Professional
4 drops/gallon spray B 2 weeks post plant 25 GAL/AC
4 Standard Fertility
Grower's Secret
Professional
4
drops/gallon
drench
A Drench transplants
1 gal/tray (app 250
plant
Grower's Secret
Professional
4 drops/gallon spray BCDE
2 weeks post plant, 30 day
interval
25 GAL/AC monthly after B
Later treats at 50-100
gpa
5 Standard Fertility
Grower's Secret
Professional
4
drops/gallon
drench
A Drench transplants
1 gal/tray (app 250
plant
Grower's Secret
Professional
4 drops/gallon spray BCDE
2 weeks post plant, 30 day
interval
25 GAL/AC monthly after B
Later treats at 50-100
gpa
3-18-18 1 gal/ac BCDE
2 weeks post plant, 30 day
interval
25 GAL/AC monthly after B
Later treats at 50-100
gpa
9/4/2012 (12gstoms01 Growers Secret 2012 Tomato Trial.PRT) Protocol Treatments Page 2 of 11
Holden Research and Consulting
Field Testing for Grower's Secret Pro Plant Growth Enhancer on Tomatoes Summer
2012
Protocol ID: 12gstoms01
Location: Oxnard, CA Study Director: Chuck Schiller
Investigator: David Holden

7. CONDUCTANCE
(A measure of chlorophyll in leaves)
b*
ab a ab
a
Preliminary report
* Data with the same letter are not statistically different.

8. TOMATO YIELD (Tons/Acre)
d
b c ab a
Preliminary report
* Data with the same letter are not statistically different.

9. % MARKETABLE FRUIT
a
a
a a
a
Preliminary report
* Data with the same letter are not statistically different.

10. WEIGHT OF FRUIT (grams)
d
a
c
b
ab
Preliminary report
* Data with the same letter are not statistically different.

11. ECONOMICS
• INVESTMENT
– Cost of Grower’s Secret PROFESSIONAL (GSP) = $17.50 / fl. oz.
(wholesale)
– Number of applications in test = 5
– Cost of Grower’s Secret PROFESSIONAL = $87.50 / acre (plus fertilizer)
• RETURN
– Assumed value of one ton of tomatoes = $69.40*
– Yield Standard Fertility = 23 Tons = $1,596.20 /a
– Yield Standard Fertility + Grower’s Secret PROFESSIONAL = 35.1 Tons =
$2,435.94 /a
• TRANSLATION
– Approximately 52.6% increase in yield and profit (minus fertilizer
expenses)
* California Tomato Growers Association - 2011 value

12. ECONOMICS
• Translated * to 2011 California average yield (46.3 Tons /a)
• 46.3 Tons /a @ 69.40 /Ton = $3,213.22
• 52.6% possible increase from Grower’s Secret PROFESSIONAL
= 70.65 Tons /a @ $69.40 = $4,903.37
• INCREASE = $1,690.15 - $87.50 (minus fertilizer costs)
• Translated profit per acre = approximately $1,602.65 (minus fertilizer
costs)
• Investment $87.50 + fertilizer cost
• Return on Investment over cost of Grower’s Secret
PROFESSIONAL (not including fertilizer ) = as high as 1,840%.
* Based on translation from small plot data

13. SUMMARY
“These are some amazing numbers. Very hard to believe
this is from 4 drops per gallon of spray water! ”
David Holden
Why did David say this? Grower’s Secret treated plots had:
- Statistically higher level of chlorophyll in plants
- Statistically larger fruit
- Numerically higher percent of marketable fruit
- Statistically higher yields