Date of Award


Degree Type


Degree Name

Master of Science - Agriculture



First Advisor

Dr. Michael Maurer

Second Advisor

Dr. Jared Barnes

Third Advisor

Dr. Josephine Taylor


Two experiments were conducted on spacing of Helianthus annuus in East Texas to determine the spacing treatment that produces the greatest revenue per m2. The experiments had four spacing treatments of 8 × 15 cm, 15 × 15 cm, 23 × 23 cm, and 30 × 30 cm. Three different cultivars were used in each experiment to determine if there was an interaction between spacing and cultivars. In both experiments, the stem height, stem diameter, flower diameter, and disk diameter increased as spacing increased. Also, as spacing increased, the days-to-harvest decreased. The 8 × 15 cm spacing produced the largest percentage of unmarketable and smaller size flowers while the 30 × 30 cm spacing produced the fewest unmarketable flowers. The net revenue declined substantially with increased spacing. Analysis of these two experiments concluded the most profitable spacing of specialty cut sunflowers grown in East Texas is 8 × 15 cm. East Texas growers should consider the quality and quantity of desired crop to determine the proper spacing of specialty cut sunflowers.

Creative Commons License

Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.



Tell us how this article helped you.


To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.