California 4-H State Field Day 

In-person State Field Day
May 25, 2024
UC Davis Wellman Hall and Hart Hall

Virtual State Field Day Contests
April 30-May 23, 2024

Plant Science Contest

All youth ages 9-18 are welcome to participate!
Drop-in to the contest room anytime during the contest hours to participate.

May 25, 2024, 9:00 am to 3:00 pm
UC Davis Hart Hall

The Plant Science Contest is organized into three parts:

  1. Judging
  2. Plant Identification
  3. Written

2018 Plant Science contest

The contest provides opportunities for you to:

  • Increase your knowledge of horticultural plants and horticultural/plant science techniques
  • Expand your ability to identify various plants
  • Interact with other youth interested in plant science. 

Questions? Please contact
Competition Coordinator: Terry Berke at

Results will be shared during the Awards Ceremony on May 26, 2024.

Certificates and pins will be mailed to UCCE 4-H county offices.

About 4-H Plant Science


2018 Plant Science contest

4-H Plant Science teaches youth...

  • Applied biological/agricultural sciences including production of all plants.
  • Insight into agriculture and develop understanding of the basic principles of plant physiology as they relate to plant growth and development.
  • An understanding of the methods and values of scientific research and its influence on plants and soils.
  • The use of biotechnology as it pertains to the development of new and improved plant varieties.
  • The role of plant nutrients, water and soil in plant growth and the geographic areas suited for plant growth.
  • The use of Integrated Pest Management (IPM) as part of an overall crop production system.


National Junior Horticultural Association (NJHA)

NJHA Study Manual - A good online resource for 4-H members interested in doing independent research on plant science

University of California (UC) Master Gardener Program - The UC Master Gardener Program extends UC research-based information about home horticulture and pest management to the public.

National Qualifier:

The four highest scoring senior-age 4-H youth (15-18) will be eligible to be part of the California State 4-H Plant Science team representing California at the National Junior Horticultural Association contest.

In addition to the qualifying California 4-H team members, other 4-H youth can attend the convention and participate in demonstration, speech, cooking, and several other contests.


2019 Horticulture National team with Coach Terry Berke

2019 Horticulture National team with Coach Terry Berke

The California 4-H team at the National Junior Horticulture Association convention in St. Louis in October 2018 took home the 1st place team trophy! In addition, they placed 1st, 3rd, 5th, and 6th in the individual competitions.

The 4-H team at the 2019 convention placed 3rd, behind Maryland and Kansas.