Harmony Horticulture · Based in Phoenix, Arizona
We Solve Complex Landscape Problems Others Can't Diagnose
Expert horticultural consulting for large-scale properties, HOAs, and construction projects throughout Arizona — and select projects nationally and internationally.
Request a ConsultationNot a landscaping company. We diagnose, consult, and oversee.
Our Clients
Built for Complex Properties Where the Stakes Are Higher
HOAs & Community Management
Independent oversight for multi-property landscapes, vendor accountability, and long-term health planning.
Property & Estate Managers
Diagnostic support for high-value properties where landscape performance is non-negotiable.
Builders & Contractors
Tree protection, soil analysis, and horticultural compliance during and after construction.
Architects & Designers
Technical horticultural guidance to ensure your designs perform as beautifully as they look.
Commercial Properties
Landscape oversight and diagnostic expertise for commercial sites where curb appeal and liability matter.
Estate Homeowners
Specialized horticultural care for large estate properties where landscape investment, tree health, and long-term performance are paramount.
Landscape Maintenance Contractors
Specialized training and professional resources to sharpen your team's horticultural knowledge and elevate the quality of your work.
Not Sure Where You Fit?
Explore all the property types and situations we serve — and see if we're the right partner for your landscape.
Explore Who We ServeWho This Is Not For
We're Selective About the Projects We Take
Not for small, one-off plant issues. If your concern is limited to a single plant or a minor landscape question, local nurseries and maintenance professionals may be a better fit.
Not for routine maintenance questions. Mowing schedules, routine fertilization, and standard pruning are best handled by a landscape maintenance company.
Not for DIY troubleshooting. Our engagements begin with formal on-site assessments and a plan that is tailored to your needs.
What We Do
Find the Cause. Fix the Problem. Protect the Investment.
Diagnosis & Problem Solving
Systematic identification of plant health decline, pest pressure, soil deficiencies, and root-zone issues. We find what others miss.
Landscape Oversight & Consulting
Independent third-party review of landscape contractors, maintenance programs, and long-term performance planning.
Flower and Garden Design & Maintenance
Fully managed flower rotations, rose care, edible gardens, and specialty plantings — designed and maintained year-round for curated color and seasonal interest.
Irrigation & Water Management
Evaluation of irrigation design, scheduling, and system performance to eliminate water-related plant stress and waste.
Construction & Tree Preservation
Pre-construction assessments, root zone protection plans, and post-construction recovery for existing trees and vegetation.
Specialty Horticulture Services
Desert-adapted plant expertise, specimen tree evaluation, and complex horticultural challenges requiring advanced knowledge.
Real Problems Solved
Case Studies
Commercial Property
Restoring Mature Canary Island Date Palms
Problem
Widespread nutrient deficiencies causing yellowing fronds, reduced canopy density and declining vigor in the property's most prominent palms.
Diagnosis
A customized palm nutrition program based on canopy-size calculations, fertigation and seasonal applications timed to environmental conditions.
Result
Within one growing season, new growth showed a richer green color, increased crown density and stronger overall vigor.
Luxury Residential Estate
Restoring a Luxury Estate Ficus Privacy Hedge
Problem
A mature ficus privacy hedge had become increasingly sparse, with yellowing foliage, interior defoliation and localized leaf scorch.
Diagnosis
Environmental stress from reflective heat and porous native soils — not disease — identified through irrigation, soil and microclimate evaluation.
Result
A science-based management plan addressing the causes of decline rather than simply treating visible symptoms.
About the team
Kasey Harman, Founder
Kasey's horticultural roots run deep—literally. Growing up on her family's citrus farm in southwestern Arizona, she developed an early appreciation for how plants, people, and the desert environment interact. That foundation ignited a lifelong passion for cultivating healthy landscapes and thriving ecosystems.
Kasey earned her degree in Plant Biology from Arizona State University, specializing in Urban Horticulture. Her career began with hands-on experience across multiple sectors of the landscaping industry, giving her a well-rounded understanding of plant care, design, and management. In 2008, she founded Harmony Horticultural Consulting to bridge the gap between science-based plant care and the practical realities of landscape management.
Over the past 18 years, Kasey has become a trusted leader in diagnosing plant health issues and guiding property owners, estate managers, and landscape professionals toward long-term, sustainable solutions. Her expertise includes water management, soil fertility strategies, pruning best practices, and integrated pest management. With her guidance, countless landscapes have become healthier, more resilient, and more beautiful year-round.
Beyond her consulting work, Kasey has been an active leader within the Arizona Landscape Contractors' Association (ALCA) for more than 25 years and currently serves as Education Committee Chair. She is a frequent speaker for the Arizona Community Tree Council (ACTC) and the SHADE conference, and over the past two decades she has volunteered across the tree and landscape industries, teaching more than 100 professional classes to contractors, arborists, and landscape professionals throughout Arizona.
Today, Harmony Horticulture is a respected consulting team serving the Phoenix metro area and beyond, known for its proactive, science-driven approach to plant care. Kasey's blend of academic knowledge and practical field experience continues to make her an invaluable resource for clients seeking healthier, more vibrant landscapes.
Read more about Kasey →Credentials & Affiliations
ISA Certified Arborist #WE-8811A
Prescription Pruning Qualification
PMD Certified Applicator #070186
AZ Certified Landscape Professional
SLM Certified
CLIA Trained
B.S. Plant Biology, emphasis on Urban Horticulture, Arizona State University
20+ Years Professional Consulting Experience
Specialist in Xeriscape landscapes and Urban Horticulture
Education Committee Chair on the Board of Directors, Arizona Landscape Contractors' Association (ALCA) — 25+ years of volunteer educator experience at ALCA
Speaker, Arizona Community Tree Council (ACTC) and SHADE Conference
ALCA Landscape Awards project judge
100+ professional classes taught across the tree and landscape industries over two decades
City of Phoenix Tree and Shade Master Plan, Advisor
The Process
How a Consulting Engagement Works
Request a Consultation
Tell us about your property and the challenge you're facing. We'll determine if it's the right fit.
On-Site Assessment
A thorough site visit to evaluate conditions, document findings, and ask the right questions.
Diagnosis & Plan
A clear written report with findings, root-cause analysis, and specific recommendations.
Ongoing Oversight
For complex situations, we provide continued monitoring and contractor oversight to ensure results.
What Clients Say
Results That Speak
Jon Samuelson
Homeowner
"The professionals at Harmony have become an increasingly valuable partner in helping us create and maintain a happy, healthy and attractive landscape for about 5 years now. They ask relevant questions and provide practical advice with our goals in mind for our outdoor spaces. They are both hands on and coaches from across town. They work with us in ways that work for us, and that is rare today. With the realities of climate change on our desert, what used to work sometimes doesn't work anymore. They stay ahead of it and our home landscape looks so much better as a result. We HIGHLY recommend Kasey and Kristen!!"
Taylor Vache
Property Owner
"Kasey and her team are phenomenal! They are so educated in plant health and always have your property in the fore front of their minds. They go above and beyond always to make sure the plants and trees are doing well. I would recommend them to anyone!"
Eddie Tweedie
Landscape Contractor
"It has been a pleasure collaborating with Robbie from Harmony on one of Arizona's master-planned communities. Working together to maintain sustainable landscaping while meeting the community's aesthetic objectives has been an excellent experience over the past few years."
Caroline
Homeowner
Having Kasey oversee our property gives us complete confidence that our landscape is in the very best hands. Under her care, it has truly become a beautiful oasis that we enjoy every day.
Erin Steinbruegge
Homeowner
After getting vague, conflicting, or flat-out incorrect answers from multiple landscaping companies, HHC was a complete 180 — honest, direct, expert-backed answers from day one.
Ready to Solve Your Landscape Problem?
Tell us about your property and what you're seeing. We'll determine whether a consultation is the right next step.
Request a Consultation