St. Louis's Landscaping Rules: The Rules That Matter

Every city handles landscaping rules a little differently. In St. Louis, Missouri, there are 8 distinct rules that residents and property owners should be aware of. Some are stricter than what neighboring cities enforce, and others are more relaxed. Here is what you need to know.

Water Restrictions

St. Louis has no permanent irrigation schedule. The City Water Division, which draws from the Mississippi and Missouri Rivers via Chain of Rocks and Howard Bend plants, may impose emergency restrictions during drought declarations but none are currently in effect. Missouri follows riparian reasonable use water law.

Key details: Standing Restrictions: None. Water Source: Mississippi and Missouri Rivers. Utility: St. Louis City Water Division. Emergency Authority: Water Commissioner (Ord. §23.24). State Framework: Riparian reasonable use (RSMo Ch. 640).

During declared drought emergencies, violations of watering restrictions range from $50 (first offense) to $500 (repeat) under the emergency proclamation. No fines apply during normal operations. Commercial water theft or tampering with city hydrants is a Class A misdemeanor under Ord. §23.24.210 carrying fines up to $1,000 and up to 1 year in jail.

The rules around water restrictions in St. Louis lean permissive, but that does not mean anything goes.

Tree Removal & Heritage Trees

St. Louis street trees (in the public right-of-way between sidewalk and curb) require a permit from the Forestry Division before any trimming or removal under Ord. §22.20. Private yard trees are not regulated except during construction. Illegal street tree removal carries fines up to $500 plus replacement cost.

Key details: Street Trees: Permit required (Forestry Division). Private Yard Trees: Generally no permit needed. Historic Districts: Cultural Resources review. Fine Range: $100-$1,000 + replacement cost. Arborist Registration: Annual, required (§22.20.080).

Unpermitted street tree removal or damage: $100-$500 fine per tree under Ord. §22.20.150, plus restitution for replacement value (typically $300-$3,000 depending on species and caliper per ISA appraisal). Damaging a tree with equipment, herbicide, or excavation: same fine schedule plus damages. Unregistered arborist operating in city: $100 per day of violation. Landmark Tree removal without Forestry Commissioner approval: up to $1,000 fine per tree.

This is not one of those rules that cities tend to ignore. St. Louis actively enforces its tree removal & heritage trees requirements.

Rainwater Harvesting

Rainwater harvesting is legal and unregulated in St. Louis. Missouri does not restrict private rainwater collection.

Key details: State Law: Legal statewide, unregulated. Rain Barrels: No permit required. Cisterns: Plumbing permit + backflow prevention. MSD Programs: Rebates historically available. Non-Potable Only: Unless NSF-treated.

Contact your local code enforcement office for specific penalty information.

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

Tree Trimming

St. Louis property owners are responsible for trimming trees on their property that overhang public sidewalks (minimum 8 feet clearance) and streets (14 feet).

Key details: Sidewalk Clearance: 8 ft vertical. Street Clearance: 14 ft vertical. Street Trees: Permit required (free) from Forestry. Unauthorized Removal: Fine + tree replacement value. Free Planting: Street Tree Program available.

Overhanging branches: notice to trim, then City trim at owner expense. Unauthorized street tree work: $100-$500 plus replacement cost.

Native Plants

Native plant landscaping is allowed in St. Louis. Residents replacing lawn with prairie or pollinator gardens should register the managed planting with the Forestry Division to avoid the 7-inch grass ordinance.

Key details: Permitted: Yes, with documented management. Height Ordinance: Must register to exempt from 7-inch rule. Recommended Edge: Defined border, paths, mulch. Resources: MO Botanical Garden Grow Native. Initiative: BiodiverseCity St. Louis.

Contact your local code enforcement office for specific penalty information.

The rules around native plants in St. Louis lean permissive, but that does not mean anything goes.

Artificial Turf

Artificial turf is permitted on St. Louis residential property with no specific permit required for residential ground-level installations. Historic district properties need Cultural Resources Office review.

Key details: Residential Backyards: No permit required. Historic Districts: Cultural Resources Office review. Stormwater: MSD review for large installations. Commercial: Zoning permit required. Maintenance: Torn/stained turf is a nuisance.

Contact your local code enforcement office for specific penalty information.

The rules around artificial turf in St. Louis lean permissive, but that does not mean anything goes.

Grass Height Limits

St. Louis City Property Standards Code (Ord. §11.72) limits grass and weeds to 7 inches maximum on residential and vacant lots. Citizens' Service Bureau (CSB) enforces complaints; unabated lots are cut by Forestry Division at owner expense plus a lien.

Key details: Maximum Height: 7 inches (Ord. §11.72). Enforcement: Forestry Division via CSB complaints. Notice Period: 10 days to abate. City Cut Cost: $75-$200 + admin fee as lien. Court Fine: Up to $500 per offense.

Initial Notice of Violation: 10-day compliance window. City-performed abatement: contractor cost (typically $75-$200 per cut) plus $75-$150 administrative fee added to property tax bill as a special tax lien. Municipal Court summons for chronic violators: fines up to $500 per offense plus court costs. Each day of continued violation may constitute a separate offense.

Weed Ordinances

St. Louis Ordinance Ch. 11.72 treats noxious weeds and overgrown vegetation as a public nuisance. The 7-inch grass rule extends to all rank weed growth, brambles, and invasive species.

Key details: Height Limit: 7 inches. Prohibited: Poison ivy/oak, ragweed, invasives. Notice Period: 10 days. Repeat Offenders: Annual scheduled cut + recurring bill. Code: St. Louis Ch. 11.72 (RSMo 71.285 authority).

$50-$150 admin fee per cut plus contractor cost. Repeat violators may be charged for a full-season recurring cut. Liens block property sales.

This is one of the stricter rules in St. Louis's municipal code. If you are unsure whether your situation complies, it is worth checking with the city before proceeding.

The Bottom Line

Compared to many U.S. cities, St. Louis gives residents more room on landscaping rules. 4 of the 8 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 St. Louis'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.