Trees, the way they actually grow.

HolisticArborist is built by Treelation, an Arizona tree-care practice that has been serving the Phoenix metro since 2012.

About the founder

Andrew has been working around trees since 1996 — starting at age 12, trained by farmers who grew apple orchards. That's nearly three decades of hands-on experience with irrigation, root health, soil, and the slow art of keeping living systems alive in the long run.

Today that background is focused on the Sonoran Desert: deep watering, root structure, drainage, soil conditions, and practical guidance Phoenix-metro homeowners can actually use. Andrew is currently studying for the ISA Certified Arborist exam and completing additional summer coursework dedicated to proper tree watering in this region and to rainwater harvesting for trees.

How this guide is built

• • Built specifically for Sonoran Desert conditions — not generic landscape rules.
• • Adjusts for tree type, age, month-group, sun exposure, soil, recent rain, and observed symptoms.
• • Designed to catch overwatering and drainage problems, not just under-watering.
• • Continually refined through field use, ongoing study, and review against real desert-tree conditions.
• • Best used as a starting point. Site-specific issues may still need an on-site assessment.

Educational guidance

This calculator is educational guidance for homeowners, not a substitute for on-site diagnosis. If a tree shows persistent decline, structural failure, or suspected disease, book an assessment.