Native Plants: Honolulu vs Mililani Mauka
How do native plants rules compare between Honolulu, HI and Mililani Mauka, HI?
Honolulu and Mililani Mauka have similar restriction levels.
Honolulu, HI
Honolulu County
Honolulu County permits native Hawaiian species as landscape substitutions under LUO Sec. 21-4.70 but does not mandate native-only planting; voluntary guidance comes from the Board of Water Supply Xeriscape Program.
View full Honolulu rules →Mililani Mauka, HI
Honolulu County
Mililani Mauka landscape designs may substitute native Hawaiian species for standard street trees under LUO Sec. 21-4.70; no mandatory native-only rule applies.
View full Mililani Mauka rules →Key Facts Comparison
| Fact | Honolulu | Mililani Mauka |
|---|---|---|
| Code section | LUO Sec. 21-4.70 | - |
| Native mandate | None | - |
| Substitution allowed | Yes for street trees | - |
| Voluntary program | BWS Xeriscape | - |
| Applies to | All Oahu zoning districts | - |
| Code | - | LUO Sec. 21-4.70 |
| Mandate | - | None for natives |
| Climate fit | - | Central Oahu plateau |
| Guidance | - | BWS Xeriscape Program |
Highlighted rows indicate differences between cities.
Honolulu FAQ
Does Honolulu require native plants in new landscaping?
No. LUO Sec. 21-4.70 allows native species as substitutions but does not require them. Voluntary guidance from BWS and UH CTAHR supports native plant selection.
Can I replace a required street tree with a native species?
Yes. The Land Use Ordinance permits approved native Hawaiian species as landscape substitutions with acceptance from the Department of Planning and Permitting.
Mililani Mauka FAQ
Will the Mauka HOA approve native landscaping?
Usually yes. Submit plans to the Mililani Mauka Community Association; natives typically qualify if the design matches approved palettes and screening standards.
Do natives count as LUO landscape requirements?
Yes. LUO Sec. 21-4.70 explicitly permits natives as street tree substitutes and accepts them toward landscape area minimums if layout standards are met.
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