Fertilize Now!

The best time to fertilize your plants and trees is when they need it—or better yet, before they show signs of stress. In the desert southwest, extreme summer heat can be brutal, but that doesn’t mean fertilization should stop. In fact, when done properly, summer fertilization can be the key to helping your trees and plants survive the season.

Most arborists and landscape professionals will advise against fertilizing during the summer—and for good reason: improperly timed or poorly chosen fertilizer applications can do more harm than good. But here's the truth: they tell you not to fertilize because most people (including many pros) lack the knowledge to do it safely and effectively.

At Dendrology Consulting, we do things differently. With over 30 years of hands-on, science-based experience caring for Phoenix trees and landscapes, we go far beyond guesswork. We perform:

• On-site soil analysis to determine current nutrient levels and deficiencies
• SPAD meter testing for real-time chlorophyll and nitrogen levels in plant tissue
• Diagnosis based on species-specific needs, seasonal timing, and current stress factors
• Custom fertilizer plans using products with Water-Insoluble Nitrogen (WIN) > 50% to minimize burn risk
• Low salt index fertilizers that won’t damage roots in dry soils
• Application methods in accordance with ISA Best Management Practices for Tree & Shrub Fertilization

Understanding Water Insoluble Nitrogen (WIN) is essential—these are slow-release forms of nitrogen that feed your plants gradually, preventing fertilizer burn and maximizing uptake efficiency. Fertilizers with WIN over 50% are ideal during heat stress conditions. We also use products with low salt indices, preventing further desiccation or salt injury to sensitive roots.

No other tree care company in the Valley has the tools, the field-tested wisdom, or the scientific rigor to do what we do. While others are forced to play it safe, Dendrology Consulting brings confidence, clarity, and action.

Led by ISA Certified Arborist (#WE-2325) Bryan Wallace, Dendrology Consulting has held over 20 professional certifications, board positions, and honors through the International Society of Arboriculture, Tree Care Industry Association, Arizona Landscape Contractors’ Association, Smartscape & SLM, University of Arizona Extension, and the US Department of Agriculture.

We are the only company in Greater Phoenix equipped to test, diagnose, and correct plant nutrient deficiencies the same day—right at your home or business.

We don’t take shortcuts. We take time. We take measurements. We apply science, not superstition.

Don’t guess. Don’t wait.
Fertilize Now—The Right Way. Call 602-203-0007 or visit www.dendrologyconsulting.com to schedule your consultation today.

Serving Phoenix, Scottsdale, Paradise Valley, Tempe, Chandler, and surrounding communities with expert tree diagnostics and fertilization.