Weed Science Society of America
The Weed Science Society of America promotes research, education, and extension outreach activities related to weeds; provides science-based information to the public and policy makers; and fosters awareness of weeds and their impacts on managed and natural ecosystems.
Weed Science Society of America at a glance
In short: Weed Science Society of America gave $87K across 2 grants in 2024 (avg $44K), mostly in Colorado. Source: 2024 IRS Form 990.
- Annual giving (2024)
- $87,421
- -2.8% vs 2023
- Grants made (2024)
- 2
- -33.3% vs 2023
- Average grant
- $43,711
- +45.8% vs 2023
- Median grant
- $43,711
- Total assets
- $2,505,394
- +1.3% vs 2023
- Primary geography
- Colorado (60% of itemized 2024 grant dollars)
- Latest 990 filing
- Form 990, 2024 View filing
Data from IRS Form 990, 2024; updated September 2026.
How to apply to Weed Science Society of America
Open Grants
4 open opportunities from Weed Science Society of America
Science Policy Fellow (SPF) Program
Weed Science Society of America
Amount
Varies
Deadline
Deadline not published
WSSA Graduate Student Travel Award
Weed Science Society of America
Amount
Varies
Deadline
Deadline not published
WSSA Photo Contest
Weed Science Society of America
Amount
Varies
Deadline
Deadline not published
Who Weed Science Society of America funds
How this funder distributes its grants
Top Recipients
Top 2 recipients in 2024
The largest 2024 recipient was Southern Weed Science Society ($52K). Together the top 2 received $87K.
Grant Size Distribution
9 grants across all recorded years
The most common grant size was under $50K: 7 grants of 9 (78%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2024 grant dollars across all 2 itemized grants.
Cities
How Weed Science Society of America gives
- Giving grew 542% from 2021 to 2024. Method
From the foundation's IRS Form 990 filings. Methodology.
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2020 to 2024, annual grant giving ranged from $14K (2021) to $90K (2023). In 2024 it made 2 grants totaling $87K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Southern Weed Science Society Westminster, CO | Innovative Grant | $52,421 |
| University of Georgia Research Foundation Athens, GA | Innovative Grant | $35,000 |
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Net Investment Income |
|---|---|---|---|---|---|---|
| 2024 | $2,505,394 | $878,992 | $1,013,904 | $87,421 | 2 | $113,106 |
| 2023 | $2,473,389 | $907,194 | $894,802 | $89,935 | 3 | $196,608 |
| 2022 | $2,487,427 | $695,646 | $651,861 | $20,936 | 2 | $85,542 |
| 2021 | $2,570,547 | $693,791 | $626,356 | $13,614 | 1 | $71,424 |
| 2020 | $2,302,268 | $1,117,670 | $941,508 | $37,905 | 1 | $83,184 |
About Weed Science Society of America
Based on IRS filings
Weed Science Society of America is a public charity focused on Environment & Animals, based in Westminster, CO. IRS filing data is available from 2020 through 2024. As of 2024, the organization holds $2.5M in total assets. In 2024, it awarded 2 grants totaling $87K. Net investment income was $113K.
Focus Areas
Leadership & Key People
Officers and directors from IRS filings
Weed Science Society of America is led by Gregory Dahl, President since 2024 (on filings since 2022); 1 of 30 officers listed in 2024 is compensated.
Officers on the 2024 filing
Gregory Dahl
President
Vice President → President-Elect, 2023
President-Elect → President, 2024
On filings since 2022
5 hrs/week
No compensation reported
Lee Van Wychen
Director of Science Policy
On filings since 2020
40 hrs/week
$143K (2020) → $152K (2024)
Chris Willenborg
Director
On filings since 2020
2 hrs/week
No compensation reported
John Byrd
Director
On filings since 2020
2 hrs/week
No compensation reported
John Lindquist
Director
On filings since 2020
2 hrs/week
No compensation reported
Lynn Sosnoski
Director
On filings since 2020
2 hrs/week
No compensation reported
Alan Helm
Director
On filings since 2021
2 hrs/week
No compensation reported
Brett Miller
Director
On filings since 2021
2 hrs/week
No compensation reported
James Kells
Director
On filings since 2021
2 hrs/week
No compensation reported
Jill Schroeder
Director
On filings since 2021
2 hrs/week
No compensation reported
Mark Vangessel
Director
On filings since 2021
2 hrs/week
No compensation reported
Michael Flessner
Director
On filings since 2022
2 hrs/week
No compensation reported
Sarah Kezar
Director
On filings since 2022
2 hrs/week
No compensation reported
Steven Pyle
Director
On filings since 2022
2 hrs/week
No compensation reported
Ben Sperry
Director
On filings since 2023
2 hrs/week
No compensation reported
Darren Robinson
Director
On filings since 2023
2 hrs/week
No compensation reported
Andrew Howell
Director
New on the 2024 filing
2 hrs/week
No compensation reported
Christy Sprague
Director
New on the 2024 filing
2 hrs/week
No compensation reported
Erin Burns
Director
New on the 2024 filing
2 hrs/week
No compensation reported
Isabel Werle
Director
New on the 2024 filing
2 hrs/week
No compensation reported
Peter Dotray
Director
New on the 2024 filing
2 hrs/week
No compensation reported
Sara Ward
Director
New on the 2024 filing
2 hrs/week
No compensation reported
Eric Gustafson
Executive Secretary
On filings since 2020
5 hrs/week
No compensation reported
Greg Elmore
Treasurer
Director → Treasurer, 2021
On filings since 2020
5 hrs/week
No compensation reported
Stanley Culpepper
Past President
President-Elect → President, 2022
President → Past President, 2023
On filings since 2020
5 hrs/week
No compensation reported
Carroll Moseley
Past President
Vice President & President-Elect → President, 2023
President → Past President, 2024
On filings since 2021
5 hrs/week
No compensation reported
Lauren Lazaro
Treasurer
Secretary → Treasurer, 2024
On filings since 2021
5 hrs/week
No compensation reported
Hilary Sandler
President-Elect
Vice President → President-Elect, 2024
On filings since 2023
5 hrs/week
No compensation reported
Ian Burke
Vice President
New on the 2024 filing
5 hrs/week
No compensation reported
Kelly Backscheider
Secretary
New on the 2024 filing
5 hrs/week
No compensation reported
Former officers (14)
- Former: Anita Dille (2020–2023) — Director
- Former: Rob Richardson (2020–2023) — Director
- Former: Dawn Refsell (2020–2022) — Director
- Former: Francois Tardif (2020–2022) — Director
- Former: Rakesh Chandran (2020–2022) — Director
- Former: William Curran (2020–2022) — Director
- Former: Delany Foster (2021–2022) — Director · Filing note: As of 21621
- Former: Darren Robertson (2022) — Director
- Former: Darrin Dodds (2020–2021) — Director · Filing note: Thru 2/16/2021
- Former: Larry Steckel (2020–2021) — Director · Filing note: Thru 2162021
- Former: Marty Schraer (2020–2021) — Director · Filing note: Thru 2162021
- Former: Phil Banks (2020–2021) — Director · Filing note: Thru 2/16/2021
- Former: Wykle Greene (2020–2021) — Director · Filing note: Thru 2/16/2021
- Former: Bill Curran (2021) — Past President
Data from IRS Form 990 filings, 2020–2024. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Compensation Overview
From 2024 IRS filing
The highest reported compensation on the 2024 filing was $152K, to Lee Van Wychen (Director of Science Policy).
Frequently asked questions about Weed Science Society of America
How much does Weed Science Society of America give each year?
Weed Science Society of America gave $87K across 2 grants in 2024, according to its 2024 IRS Form 990. In 2023 it gave $90K across 3 grants.
How large is Weed Science Society of America?
Weed Science Society of America reported $2.5M in total assets on its 2024 IRS Form 990. Its revenue that year was $879K.
What is Weed Science Society of America?
Weed Science Society of America is a public charity focused on Environment & Animals, based in Westminster, CO. It holds $2.5M in total assets as of 2024.
Where does Weed Science Society of America operate?
Weed Science Society of America has awarded grants in Colorado, Georgia, Iowa, Idaho, Mississippi, New Mexico, Pennsylvania, Washington.
What is Weed Science Society of America's EIN?
Weed Science Society of America's EIN (Employer Identification Number) is 37-0911208. IRS Form 990 filing data is available on this page for 2020–2024.
Data last updated September 2026. Sourced from IRS Form 990 filings.
Data update history
(6)
When this profile's IRS filing data changed on Grantable
- Updated Form 990 for fiscal year 2020 (received by the IRS July 28, 2021)
- Updated Form 990 for fiscal year 2021 (received by the IRS October 4, 2022)
- Updated Form 990 for fiscal year 2022 (received by the IRS October 11, 2023)
- Updated Form 990 for fiscal year 2023 (received by the IRS October 14, 2024)
- Updated Form 990 for fiscal year 2024 (received by the IRS October 13, 2025)
- IRS filings on file for fiscal years 2020–2024
Live grants for the work Weed Science Society of America funds
Environment & Animals Open opportunities, soonest deadline first.
Explore Open Grants
Browse active grant opportunities in Weed Science Society of America's focus areas in our free grants database
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