1. “EFFECTS OF FOLIAR APPLICATIONS
OF GROWER’S SECRET
PROFESSIONAL APPLIED TO
STRAWBERRY”
Research by David Holden
Holden Research and Consulting
10/14/2012

2. “EFFECTS OF FOLIAR APPLICATIONS OF
GROWER’S SECRET PROFESSIONAL APPLIED
TO STRAWBERRY”
In the Grower’s Secret Professional treatment plot….. “The
net back to the grower after costs of approximately $6.00
per tray were removed (labor for picking, carton and tray
costs, transportation to the cooler and cooling costs) was
$965.00* per acre” over the same treatment without the
Grower’s Secret Professional.
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.
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4. SUMMARY
– The addition of Grower’s Secret Professional to
the standard fertility program significantly
increased yields and quality
– Higher Cumulative Marketable Production
– Higher Net Return ($965.00/a over same
treatment without Grower’s Secret Professional)
– No negative effects on plants, no phytotoxicity,
no application issues

5. TEST PARAMETERS
• CROP: Strawberry (Bennicia commercial field)
• LOCATION: Ventura County, California
• DESIGN: Randomized Complete Block
• PRODUCT: Grower’s Secret Professional (1.0 fl.oz./a)
• APPLICATIONS: 6 applications (applied every 3-4 weeks
pre-bloom through mid March) with standard fertilizer
application (SF)
• WATER VOLUME: Foliar, 25 gal./acre
• PLOT SIZE: 10 plants per replicate, (6 replicates)
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6. Fruit Quality
(Desiccation, Botrytis sp., Mucor sp.)

7. Marketable Production by Pick Day
SF + + 3-18-18/Zinc 6.8 %+ GS Pro
SF 3-18-18/Zinc 6.8% + GS Pro
SF = Standard fertility program
David Holden, Holden Research and Consulting, 2012

8. Cumulative Marketable Production
by Pick Day
SF = Standard fertility program
David Holden, Holden Research and Consulting, 2012

9. Marketable Production Net Return
by Pick Day
SF + 3-18-18/Zinc 6.8% SF + 3-18-18/Zinc 6.8% + GS Pro
SF = Standard fertility program
David Holden, Holden Research and Consulting, 2012

10. Cumulative Marketable Production
Net Return* by Pick Day
SF + 3-18-18/Zinc 6.8% SF + 3-18-18/Zinc 6.8% + GS Pro
SF = Standard fertility program
Does not include cost of GS Professional ($105/a/season)
David Holden, Holden Research and Consulting, 2012

11. Marketable Utilization by Pick Day
SF + 3-18-18/Zinc 6.8% SF + 3-18-18/Zinc 6.8% + GS Pro
SF = Standard fertility program
David Holden, Holden Research and Consulting, 2012

12. Mean Weight per Marketable Fruit
by Pick Day
SF + 3-18-18/Zinc 6.8% + GS Pro
SF = Standard fertility program
David Holden, Holden Research and Consulting, 2012

13. Cumulative Differential from Grower
Standard Return
SF + 3-18-18/Zinc 6.8% SF + 3-18-18/Zinc 6.8% + GS Pro
SF = Standard fertility program
David Holden, Holden Research and Consulting, 2012

14. Net Price per Flat Return to the
Grower on Given Date
David Holden, Holden Research and Consulting, 2012

15. SUMMARY
When Grower’s Secret Professional is added to
the standard fertility program on Strawberries…..
– It significantly increased yields and quality
– Allowed higher cumulative marketable production
– Allowed higher net return ($965.00/a over same
treatment without Grower’s Secret Professional)
– Caused No negative effects on plants, no
phytotoxicity, no application issues

16. CONTACT INFORMATION
Charles T. Schiller, PhD.
VP Product Management
Phone: 925-787-5457
Email: chucks@growerssecret.com
Jeff Newberry
VP Sales, Distributors and Key Accounts
Phone: 888-217-9426 ext. 205
Email: jeffn@growerssecret.com
Kim Miller
Director of Sales, Commercial Agriculture
Phone: 888-217-9426 ext 208
Email: kimm@growerssecret.com
Corporate Offices: 785 Market St., Ste 600, San Francisco, CA, 94103
www.growerssecret.com
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