Your 329 Grow Site: A Guide for Oʻahu Cardholders
Hawaiʻi’s medical cannabis program lets registered patients and their caregivers cultivate at home. Here’s how a grow site works under the 329 program, in plain language.
Updated October 26, 2026
How many plants
A registered patient’s “adequate supply” is up to ten plants, immature or mature, and four ounces of usable cannabis at any given time. The four ounces include any combination of usable cannabis and manufactured cannabis products.
Where you can cultivate
Cultivation happens at one registered grow site, and that location appears on your 329 card. The grow site can be:
- The qualifying patient’s residence
- The primary caregiver’s residence
- Another location owned or controlled by the patient or caregiver
When a caregiver cultivates for a patient, the grow site plus the caregiver’s name and date of birth appear on the patient’s card. Since Act 241 (2025), the certification form itself lists the grow location.
Who tends the plants
The registered patient and their one registered primary caregiver are the people who handle the plants and the harvest.
Plant tags
Every plant carries a legible tag showing the patient’s 329 registration number and the card’s expiration date (HAR §11-160-31(b)). DOH publishes tagging guidelines on its Growing Cannabis page.
Building it to last. A grow site is a long-term part of your property. Planning the space, soil, and irrigation once — and improving it every season — is what Aloha Cultivation helps cardholders do.
Stay current
Rules change. Confirm current requirements with the Department of Health’s Office of Medical Cannabis Control & Regulation before you build or expand.
Sources: DOH — Growing Cannabis · HRS §329-121 · Act 241 (2025)