How Phoenix Handles Landscaping Rules: A Practical Guide

Phoenix maintains 251 local ordinances across all categories, and 9 of those deal specifically with landscaping rules. Here is a breakdown of what the city actually requires, what is prohibited, and where Phoenix falls on the strict-to-permissive spectrum compared to other cities.

Composting

Backyard composting is permitted in Phoenix. The city's hot, arid climate requires enclosed bins. Must not create nuisance conditions.

Key details: Composting: Permitted. Climate: Enclosed bins recommended. Workshops: Free through the city. Solid Waste: (602) 262-7251.

No penalties for composting. Nuisance may trigger Neighborhood Services at (602) 262-7844.

If you are coming from a city with tighter rules, you will find Phoenix gives residents more flexibility on composting.

Native Plants

Section 39 of the Phoenix Neighborhood Preservation Ordinance prohibits planting pollen varieties of Olive and Mulberry trees, and noxious or invasive species on the University of Arizona Non-native Invasive Plants of Arizona list may not be planted; Zoning Ordinance Section 1309 (Table 1309.3) lists additional prohibited plants.

Key details: Code Section: Phoenix Neighborhood Preservation Ordinance Section 39; Zoning Ordinance Section 1309 (Table 1309.3). Banned new plantings: Pollen varieties of Olive and Mulberry trees. Invasive list: U of A Non-native Invasive Plants of Arizona. Existing trees: Grandfathered if planted pre-ordinance.

Enforced through landscape plan review and the Neighborhood Preservation Ordinance; prohibited species (new pollen-bearing Olive/Mulberry, listed noxious/invasive plants) will not be approved for planting, though pre-ordinance trees are grandfathered.

Grass Height Limits

Phoenix City Code Sec. 39-7(D) (Neighborhood Preservation Ordinance) requires premises to be kept free of lawn grass higher than six inches, along with tumbleweeds, dry vegetation, and weeds over six inches that present blight or a fire hazard.

Key details: Code Section: Phoenix City Code sec. 39-7(D). Max lawn grass height: 6 inches. Dead palm fronds: Banned within 10 ft of ground/structure/wall. Enforcement: Neighborhood Services Department, written notice.

Civil sanction from $100 up to $2,500 per the Neighborhood Preservation Ordinance after a written compliance notice; for abutting street/sidewalk areas, Sec. 31-10 allows a civil sanction of $50 to $2,500 and treats continued noncompliance as a Class 1 misdemeanor.

This is not one of those rules that cities tend to ignore. Phoenix actively enforces its grass height limits requirements.

Tree Trimming

Phoenix City Code Sec. 23-32 makes it unlawful to let trees, shrubs or bushes growing on your property interfere with traffic signs, pedestrians, bicyclists, vehicles, or drainage in any public right-of-way, and Sec. 31-13 limits obstructions in the sight-visibility triangle at residential intersections.

Key details: Code Section: Phoenix City Code sec. 23-32; sec. 31-13. Standard notice: 7 days before City abatement. Safety notice: 24 hours where vehicle safety is involved. Cost recovery: Twice the trimming/removal cost; lien if unpaid.

City may abate the encroachment after 7 days' notice (24 hours where motor-vehicle safety is involved) and charge the owner a fee of twice the cost of removal or trimming; unpaid fees become a lien against the property.

Rainwater Harvesting

Arizona encourages rainwater harvesting and Phoenix places no permit requirements on residential rainwater collection systems. The city has offered rebate programs for water-saving landscaping improvements. Rainwater harvesting is recommended in conjunction with native, low-water-use plants for desert landscaping.

Key details: Permit Required: No — residential collection unrestricted. State Policy: Arizona encourages rainwater harvesting. Incentives: City rebates for water-saving landscaping. Best Practice: Pair with native, low-water-use plants. Gray Water: Also permitted for landscape irrigation.

No penalties for standard residential collection. Large cistern installations without building permit: standard building code violation $100 to $500.

Phoenix is more permissive than most cities when it comes to rainwater harvesting. That said, there are still limits.

Tree Removal & Heritage Trees

Phoenix Municipal Code Chapter 34 and the Tree and Shade Ordinance require permits for removing trees over 6 inches in diameter. Protected species include native trees such as palo verde, mesquite, and ironwood. Arizona law requires the Department of Agriculture to be notified 20-60 days before destroying protected native plants.

Key details: Permit Threshold: Trees over 6 inches in diameter. Protected Species: Palo verde, mesquite, ironwood. State Notice: 20-60 days to AZ Dept of Agriculture. Residential Exemption: 10 acres or less with existing construction. Violation Fines: $500-$5,000 for unauthorized removal.

Planting prohibited tree species: citation and removal required. Encroachment on right-of-way: notice to abate.

Artificial Turf

Phoenix does not prohibit artificial turf and it is commonly used as a water-conserving alternative to natural grass. Artificial turf is not counted against the turf percentage limits in Zoning Ordinance §1309 since those limits target high-water-use plants. HOAs cannot unreasonably restrict drought-friendly landscaping under Arizona state law.

Key details: Status: Permitted — no specific prohibition. Water Savings: Recognized as conservation measure. HOA Protection: State law limits HOA landscaping restrictions. Heat Concern: Conventional turf does not reduce heat. Alternative: Xeriscape and native plants also encouraged.

No specific violations for artificial turf. Must comply with property maintenance and drainage codes. HOA violations per individual CC&Rs.

If you are coming from a city with tighter rules, you will find Phoenix gives residents more flexibility on artificial turf.

Weed Ordinances

Phoenix City Code Sec. 39-7(D) bars weeds higher than six inches and tumbleweeds on any premises, and Sec. 31-10 requires owners to keep abutting sidewalks, alleys, and streets free of overgrown vegetation and weeds, with civil sanctions up to $2,500.

Key details: Code Section: Phoenix City Code sec. 39-7(D); sec. 31-10. Max weed height: 6 inches. Compliance window: 30 days after written notice (sec. 31-10). Penalty: $50-$2,500 civil sanction; Class 1 misdemeanor.

Under Sec. 31-10, failure to comply after written notice is subject to a civil sanction of $50 to $2,500 and is a Class 1 misdemeanor (no criminal complaint filed before 90 days from the notice). Under the Neighborhood Preservation Ordinance, civil sanctions reach $2,500.

Compared to other cities, Phoenix takes a harder line on weed ordinances. The enforcement and penalty structure reflects that.

Water Restrictions

Phoenix has no fixed day-of-week outdoor watering schedule; instead, Phoenix City Code Chapter 37 (sections 37-126 through 37-130, the Drought Management Plan) authorizes the Water Services Director to declare progressive drought stages, and watering restrictions become mandatory only at Stage 2 (Water Warning) or higher. Turf in the public right-of-way is banned under Arizona state law.

Key details: Code Section: Phoenix City Code sec. 37-126 to 37-130; Drought Management Plan (Ch. 37, sec. 121-130.2). Stage 1: Voluntary conservation, public education only. Stage 2+: Watering limits and surcharges may become mandatory. Turf in right-of-way: Prohibited (Arizona state law).

Voluntary at Stage 1; at Stage 2 (Water Warning) or higher the Director may make restrictions mandatory and enforce them, including water-service surcharges authorized by Chapter 37. Water-waste violations are enforced under existing City codes.

The Bottom Line

Compared to many U.S. cities, Phoenix gives residents more room on landscaping rules. 3 of the 9 rules here are rated permissive. But permissive does not mean unregulated. There are still requirements, and the city does enforce them when violations are reported.

All of the above reflects Phoenix's municipal code as of our last review. If you need specifics on fines, exemptions, or filing requirements, the detailed ordinance pages linked above have the full breakdown.