CGM Study Guide 2026
Everything you need to pass the CGM exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 CGM Exam Format at a Glance
📚 CGM Topics to Study (72)
✍️ Sample CGM Questions & Answers
1. A grounds manager is implementing a water conservation plan. Which irrigation strategy offers the greatest water savings over traditional fixed-schedule systems?
ET-based smart controllers apply only the water lost through evapotranspiration, eliminating over-irrigation and reducing consumption by 20–50%.
2. A landscape manager discovers that a newly planted tree is exhibiting interveinal chlorosis on young leaves. The most likely nutrient deficiency is:
Iron deficiency causes interveinal chlorosis (yellow tissue between green veins) on young leaves, common in high-pH soils that limit iron availability.
3. What is the significance of professional networking in the Certified Grounds Manager field?
Professional networking facilitates knowledge exchange, generates referrals, and enables collaborative problem-solving that improves practice quality.
4. Deadheading flowering annuals throughout the growing season is primarily done to:
Removing spent flowers before seeds mature prevents the plant from diverting energy into seed production, encouraging continuous flower production.
5. An Incident Command System (ICS) is best described as:
ICS is a standardized management system that allows multiple agencies and teams to coordinate effectively during any emergency.
6. Plant hardiness zones published by the USDA are based primarily on which climate factor?
USDA Plant Hardiness Zones are determined by the average annual extreme minimum temperature in a region, indicating which plants can survive winter cold.