San Marcos, CA Invasive Plant Rules: Prohibited Species (2026)
Key Facts
- Banned species list
- California Invasive Plant Council inventory
- Rule type
- Outright prohibition, not a discouragement
- Sensitive-area rule
- Extra avoidance near parks, greenbelts, water bodies
- Governing section
- SMMC § 20.330.060(D)(1)(f)-(g)
- Review point
- Landscape Documentation Package plan check
Summary
San Marcos prohibits invasive plant species in covered landscape projects under its Water Efficient Landscape Standards. Municipal Code Section 20.330.060(D)(1)(f) bars the use of species listed by the California Invasive Plant Council, and subsection (g) directs designers to avoid invasive species near parks, buffers, greenbelts, water bodies, and open space.
f.The use of invasive species such as those listed by the California Invasive Plant Council is prohibited.g.Invasive species of plants shall be avoided especially near parks, buffers, greenbelts, water bodies, and open spaces because of their potential to harm environmentally sensitive areas.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 14 Update 1).
Full Breakdown
" That reference point, generally known as the Cal-IPC inventory, is the yardstick the City uses to identify which plants count as invasive for purposes of a landscape plan review. " Together the two subsections create a flat prohibition backed by an added siting caution near sensitive habitat. 330: new landscape projects of 500 square feet or more and rehabilitated landscapes of 2,500 square feet or more that require a building or landscape permit, plan check, or design review. A project's landscape design plan, submitted as part of the Landscape Documentation Package, has to identify proposed plant material by common and botanical name, which gives the Director's plan-check review the information needed to catch a Cal-IPC-listed species before installation. 200.
Violations & Fines
Landscaping a covered project with a California Invasive Plant Council-listed species violates Section 20.330.060(D)(1)(f) and can be pursued under the penalty provisions of Section 20.330.200: a fine under Chapters 1.12 and 1.14 of the Municipal Code, with each day of the violation counted separately, plus the City's option to seek injunctive relief requiring removal or replacement of the prohibited planting.
Frequently Asked Questions
Can I use any invasive plant in my landscaping in San Marcos?
How does the City know if a plant is invasive?
Are there extra rules near parks or waterways?
Sources & Official References
Other rules in San Marcos
California rules heatmap·Compare San Marcos to another location·View the California invasive plant rules overview
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Prohibited Species in Nearby Cities
How other cities in San Diego County handle prohibited species.