Roger Smith


I grew up in the California citrus industry as a 4th generation navel orange farmer and have always considered myself a “grower that happens to be a nurseryman.”

My Dad had a passion for specialty citrus and also planted Chandler pummelos, Oroblancos, Melogolds, Lemons, and Cocktail Grapefruit among many others.
After I graduated from Cal Poly, San Luis Obispo I taught Agriculture for a year, but longed to be a part of the citrus industry, so I left teaching and hired on with Michaelis Citrus Nursery in 1988 and attended my first ISCN Congress in Australia in 1991.

In 1998 I was hired to start TreeSource Citrus Nursery ( which is part of the AC Foods family of companies and is mindful of implementing many sustainable practices across their businesses.

My wife Kelly and I farm 20 acres of Sumo Citrus® and I’ve been a part of the ISCN Executive since being appointed Secretary in 2005.


Nick Henley-Welch


I am the second generation in a family business growing Citrus trees, originally for farmers and then later for retail, in the Algarve, Portugal. In the previous 17 years we have been producing ornamental citrus, in small pots with fruit as house plants. The nursery has MPS-A and MPS GAP and MPS Fruit and Vegetable accreditation.
Our plants are sold with fruit, free of pesticides into retail and wholesale outlets throughout Europe. We supply 1.2 million citrus plants annually for sale.

Veronica Herrera

President Past

Profession: Horticultural Engineer
Pontificial Catholic University of Valparaiso

Has a wide experience in the nursery business in the following areas: production techniques, operational, accounting – administrative, logistics and international relationships. Currently works as independent advisor for Citrus and Avocado nursery - Experimental Station of La Palma (one of the oldest and reputable Citrus nursery of Chile); and previously for almost 20 years worked in Univiveros (which is one of the biggest fruit plant nurseries in Chile) where she held different positions such as Product Manager for Citrus and Stone Fruits, General Assistant Manager and Production Manager. An important part of this work is the imports, evaluation, and commercial development of new cultivars with PBR and payment of royalties of different fruit species.


Nate Jameson

President Elect

I live in Central Florida, USA. My wife and I own and have operated Brite Leaf Citrus Nursery since 1998. Our primary focus is the production of commercial trees for growers, but we also grow trees for the home owner market. I graduated from the University of Florida in 1992 with a Bachelor’s Degree in Agricultural Operations Management. My wife Anna and I have been married for 22 years and we have two teenage sons, Nathan and William.

My vision for the ISCN to provide international collaboration between nurserymen, researchers and vendors for the purpose of improving citrus nursery production through better management, nutrition and genetics.


Jose Lima


“I grew up in the Citrus nursery business learning the craft from my father and uncle in Brazil.
I graduated with a citrus major from Florida Southern College in 1998 and have a Master in Citrus from Polythechnic university of Valencia.
Over my 20 years as a citrus nurseryman I have worked for 3 different nurseries and am currently the nursery director for Wonderful Citrus in California where I oversee the production of 600,000 trees over two states (CA and TX).

I have been involved in ISCN since 2001 publishing papers and participating in congresses over the years. “


Hussein Marei

Web Coordinator

Hussein is part of a family that have been involved in the field of agriculture across many generations for over a century in Egypt.
Over the years, through experiences passed down and knowledge accumulated, he has developed a keen interest and expertise in citrus cultivation and propagation. Along with his late father Hassan Marei, they expanded the family business Marei Orchard and Nursery to include cultivated land in various areas of Egypt as well as one of the few certified nursery operations for the propagation of quality citrus trees.

Through cooperation with various research centers and technical groups both on a local and international level Marei is always striving to be on the forefront of new technologies and innovations to advance the sector in Egypt.

Mr Marei serves as a board member in the Horticultural Export Improvement Association (HEIA). He is also on the executive committee of the International Society of Citrus Nurserymen (ISCN).