EXHIBIT 99.1

Ceres Announces Fiscal Third Quarter 2013 Financial Results

THOUSAND OAKS, Calif. – July 11, 2013 – Energy crop company Ceres, Inc. (Nasdaq: CERE) today announced financial results for the quarter ended May 31, 2013 and provided an update on its business in Brazil, its largest immediate commercial opportunity.

The company reported that its mill customers in Brazil have made continued progress in crop performance this season, which concluded in May. For mills that reported results, yields of sugars that can be fermented into ethanol were approximately 50% higher on average across mill locations than the previous season primarily as a result of product improvements related to biomass quality and productivity, better crop management and favorable growing conditions at most planting locations. Yields from location to location, however, showed greater variability than expected. Ceres sweet sorghum hybrids were developed to complement existing sugarcane feedstock supplies and extend the ethanol production season in Brazil.

“We have clearly demonstrated that economically compelling yields can be achieved with our products,” said Richard Hamilton, President and Chief Executive Officer of Ceres. “While further optimizations and additional hybrids are needed to consistently achieve high yields across wide-area plantings, we believe that we are well positioned to take a leading role in the ongoing development of the sweet sorghum market in Brazil.”

Due in part to the variability of this season’s yields, the company anticipates that many of its mill customers will repeat smaller scale commercial plantings before committing to broad, large-scale adoption. “As a result, we expect total sweet sorghum seed sales next season to grow more modestly than originally anticipated,” said Hamilton.

Ceres Chief Financial Officer Paul Kuc noted that the company continues to prioritize investments in its sorghum pipeline and its opportunity in Brazil, while closely monitoring its working capital levels. “As we move forward, we intend to maintain the strength of our balance sheet with these priorities in mind,” he said.

THIRD QUARTER BUSINESS HIGHLIGHTS

THIRD QUARTER FINANCIAL RESULTS

Total revenues for the quarter ended May 31, 2013 were $1.4 million compared to $1.1 million for the same period last year. The increase was due to higher product sales of $0.4 million, which consisted primarily of biomass sales as well as recognition of deferred revenue related to certain sales incentive and promotional programs during the 2012-2013 growing season in Brazil. The increase was partially offset by reduced billings of $0.1 million under the company’s various grants and collaborations.

Cost of product sales was $2.1 million for quarter ended May 31, 2013 compared to $0.6 million for the same period last year. The increase was due to expenses of $1.0 million for crop management services performed under the company’s sales incentive and promotional programs in Brazil, and $0.5 million for obsolete seed inventory relating to the company’s sweet sorghum products.

Research and development expenses decreased by $1.2 million to $4.1 million for the quarter ended May 31, 2013 from $5.3 million for the same period last year. The decrease was primarily due to reduced personnel and related expenses as well as reduced external R&D expenses.

Selling, general and administrative expenses were $4.5 million for the quarter ended May 31, 2013 compared to $3.3 million for the same period last year. The increase was primarily due to higher expenses related to expanded business operations and market development support in Brazil, which was partially offset by reduced patent, legal and professional fees in the U.S.

For the quarter ended May 31, 2013, Ceres reported a net loss of $9.3 million, or $0.38 per share, compared to a net loss of $8.4 million, or $0.34 per share, for the quarter ended May 31, 2012.

At May 31, 2013, cash and cash equivalents and marketable securities totaled $37.4 million.

CONFERENCE CALL AND WEBCAST INFORMATION

Ceres has scheduled a conference call for 4:30 p.m. EDT (1:30 p.m. PDT) today to discuss third quarter results. The webcast of the conference call may be accessed at investor.ceres.net. Audio of the teleconference is also available by dialing:

North America callers:

(877) 838-4153

International callers:

+1 (720) 545-0037

An audio replay of the call will be available two hours after the conclusion of the live call, and remain available on the Ceres website for 30 days.

UPCOMING EVENTS

Ceres is scheduled to present at the Jefferies Global Industrials Conference on August 12, 2013 in New York City as well as at the Advanced Biofuels Leadership Conference to be held October 9 to 11, 2013 in San Francisco, Calif. The company’s slide presentations will be posted on the investor events page of the company’s website, www.ceres.net.

ABOUT CERES

Ceres, Inc. is an agricultural biotechnology company that markets seeds for energy crops used in the production of renewable transportation fuels, electricity and bio-based products. The company combines advanced plant breeding and biotechnology to develop products that can address the limitations of first-generation bioenergy feedstocks, increase biomass productivity, reduce crop inputs and improve cultivation on marginal land. Its development activities include sweet sorghum, high-biomass sorghum, switchgrass and miscanthus. Ceres markets its products under its Blade brand.

CERES FORWARD-LOOKING STATEMENTS

This press release may contain forward-looking statements. All statements, other than statements of historical facts, including statements regarding Ceres’ efforts to develop and commercialize its products, short-term and long-term business strategies, market and industry expectations, future operating metrics, product yields and future results of operations and financial position, are forward-looking statements. You should not place undue reliance on these forward-looking statements because they involve known and unknown risks, uncertainties and other factors that are, in some cases, beyond Ceres’ control. Factors that could materially affect actual results can be found in Ceres’ filings with the U.S. Securities and Exchange Commission. Ceres undertakes no intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. These forward-looking statements should not be relied upon as representing Ceres’ views as of any date subsequent to the date of this press release.

CONTACT:

Ceres, Inc.

Gary Koppenjan

Investors (805) 375-7801

ir@ceres.net

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CERES, INC. AND SUBSIDIARY

Condensed Consolidated Statements of Operations

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CERES, INC. AND SUBSIDIARY

Condensed Consolidated Balance Sheets

(In thousands, except share amounts)

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