Lenexa, KS Landscaping Rules: Native Plants (2026)
Key Facts
- Height trigger, developed residential lots
- More than 8 inches
- Height trigger, elsewhere
- More than 12 inches
- Exemption filing deadline
- Written evidence within 10 days of Order to Abate
- Agricultural hay baling deadline
- No later than August 15 each year
- Possible perimeter condition
- 15-foot strip kept free of excessive growth
- Abatement cost payment
- Due within 30 days of notice
Summary
In the City of Lenexa, Kansas, vegetation over 8 inches on developed residential lots or 12 inches elsewhere is excessive growth, but a property is exempt if it is an undevelopable parcel dominated by native tall and mid-grasses in a maintained landscape or maintained Xeriscape. The owner carries the burden of proof and must file written evidence within 10 days of an Order to Abate.
In order to retain areas in their natural states or for areas used for agricultural purposes, certain properties may be deemed exempt from the requirements of Section 3-5-G-1 of this Article. In order to qualify as exempt, the burden of proof to produce evidence sufficient to meet the exemption is on the Property Owner, who must provide such evidence in writing to the City no later than ten (10) days from the date of any Order to Abate. ... To be considered exempt, the property must meet one of the following: ... An area, due to its physical characteristics, that is an undevelopable parcel, lot or tract and does not fall within any setback area and the dominant plant species are those of natural, climax community, tall and mid-grasses indigenous to this area, and not volunteer growth or pioneer species, and are part of a maintained landscape, or maintained Xeriscape landscape, or ... Additionally, exempted property must meet each of the following criteria: ... There are no sight distance problems created. ... There is no evidence of neglect. ... The area is kept free and clear of all Noxious Weeds, as defined in Section 3-5-I-7 of this Chapter.
Full Breakdown
Lenexa treats tall native vegetation as a code problem unless the owner qualifies for an exemption. Article 3-5, in the definitions at Section 3-5-I-7, calls vegetation Excessive Growth when uncontrolled and uncultivated growth is more than 8 inches high on developed residential lots or more than 12 inches high elsewhere in the City. Excessive growth and Noxious Weeds are unlawful under Section 3-5-G-1, and the property owner is responsible for abatement.
Section 3-5-G-3 is the allowance for natural landscapes. A property qualifies through one of two routes. The first is an undevelopable parcel, lot or tract outside any setback area whose dominant plants are natural, climax community tall and mid-grasses indigenous to the area, not volunteer or pioneer species, and part of a maintained landscape or maintained Xeriscape. The second is agricultural use shown by fertilizer or pesticide use, livestock, or hay grasses baled no later than August 15 each year. Exempt land must also have no sight distance problems, no evidence of neglect and no Noxious Weeds as defined in Section 3-5-I-7. The City can attach conditions, such as a strip at least 15 feet wide along the perimeter kept free of excessive growth.
The burden of proof is on the owner. Written evidence is due within 10 days of an Order to Abate, the same 10 days the order gives to cut the growth. A written hearing request must reach the City within 10 days, and the hearing is held within 7 business days. If abatement follows, the City bills the costs, due in 30 days, and can assess unpaid amounts against the land.
For installed landscaping, Section 4-1-D-2 defines native vegetation as tall grass prairie plants and lists Big Bluestem, Little Bluestem, Gama Grasses, Indian Grass, Switch Grass and Prairie Cord Grass, plus wildflowers such as prairie coneflower, black-eyed Susan, goldenrod and yarrow, while excluding plants listed as noxious or invasive. Section 3-5-G-4 encourages Xeriscape practices to reduce supplemental watering.
Violations & Fines
Failing to cut excessive growth after an Order to Abate lets the City cut, destroy or remove it once the 10 day period expires. A repeat violation in the same calendar year needs no further notice before abatement or a Notice to Appear in municipal court. Costs are noticed by certified mail or personal service and are due within 30 days; unpaid costs can be assessed against the lot and certified to the County Clerk for the tax rolls. Interfering with abatement is an ordinance violation under Section 1-1-C-3.
Frequently Asked Questions
Can I keep native prairie grasses in my Lenexa yard?
What deadline applies to claim the natural area exemption in Lenexa?
Can the City add conditions to a native landscape exemption?
Does Lenexa encourage native plants in required landscaping?
Sources & Official References
Other rules in Lenexa
Compare Lenexa to another location·View the Kansas landscaping rules overview
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Native Plants in Nearby Cities
How other cities in Johnson County handle native plants.