AHS LIVE: Soils and Plant Nutrition
with Gretchen Renshaw, horticulturist and director, Manhattan Beach Botanical Garden
Thursday, February 19, 2026 from 7-8 p.m. ET
Virtual
$15 AHS members/$20 non-members
This program is approved for 1 CEU with the Association of Professional Landscape Designers
A beautiful and sustainable garden starts with understanding your garden conditions, enabling you to select plants that will thrive. One crucial part of that knowledge is your garden soil. We will simplify the complex topic of garden soil into five key areas to help you understand what you need to know. This program will address soil and water, soil texture and structure, soil chemistry, nutrient delivery, and the soil ecosystem.
Gretchen Renshaw is a horticulturist and teacher. She is a founder and volunteer director at the Manhattan Beach Botanical Garden in California. This demonstration garden features California native plants and sustainable gardening practices. She is a former horticulture instructor at UCLA Extension, where she taught for over 25 years. One of her courses was a four-unit class on Soils and Plant Nutrition, for which she wrote and published Underground: A Gardener’s Guide to Soil and Plant Nutrition. Renshaw also worked as a science teacher at an elementary school, engaging students in hands-on science activities from kindergarten to fifth grade. She has a bachelor’s degree in Horticulture from Cal Poly, San Luis Obispo.