Written by
John Progar
On March 16, 2026, the Ohio Division of Cannabis Control (DCC) announced the most significant overhaul of medical marijuana purchase limits since the program launched. Effective March 24, 2026, the old whole-day-unit system is gone — replaced by a simplified daily transaction limit that gives patients substantially more purchasing flexibility and a new bulk-buy advantage unavailable to recreational consumers.
Here is exactly what changed, what it means for patients and caregivers, and why your Ohio medical marijuana card just became more valuable.
What Changed? Before and After Comparison
The DCC replaced the entire purchase tracking framework pursuant to Ohio Administrative Code 1301:18-8-09.
| Old System (Before March 24) | New System (March 24, 2026) | |
|---|---|---|
| Daily purchase limit | 2.83g plant material (1 "whole day unit") | 2.5 ounces plant material + 15,000 mg THC non-plant |
| Bulk purchase | Not available | Patients can buy 4 days at once (10 oz + 60,000 mg THC) |
| Flower tiers | Tier I (under 23% THC) and Tier II (23%+) with separate limits | Eliminated — one limit for all flower |
| Packaging | Sold in 2.83g "whole day unit" increments | Standard increments — no more unit restrictions |
| Fill periods | Two 45-day fill periods per 90-day cycle | Eliminated — daily transaction limit only |
| 90-day maximum | ~9 oz flower (Tier I) or ~5.3 oz (Tier II) | 14.06 lbs plant material + 1,350g THC |
| Day's supply calculator | Required for every transaction | Obsolete — no longer a useful reference per DCC |
| Caregiver limit | Same complex WDU system | Daily transaction only (no bulk purchasing) |
The bottom line: Ohio patients can now purchase significantly more cannabis per day, in any combination of products, without navigating the confusing tier and unit calculations that defined the program for years.
New Daily Transaction Limits Explained
Starting March 24, the system is straightforward:
Medical patients can purchase per day:
- 2.5 ounces of plant material (flower for vaporization, including raw plant material)
- 15,000 milligrams of total THC content for all non-plant products (edibles, concentrates, tinctures, topicals, vape cartridges)
The bulk purchase advantage — exclusive to medical patients:
- Patients may purchase up to four days' worth in a single transaction: 10 ounces of plant material and 60,000 mg of THC in non-plant products
- This is designed to reduce the number of dispensary trips for patients whose qualifying conditions make frequent visits difficult
Recreational consumers are limited to the daily transaction amount only — they cannot buy in bulk. This is now one of the clearest advantages of holding a medical card.
What This Means for Caregivers
Ohio caregivers operate under different rules than patients under the new system:
- Caregivers can purchase up to the daily transaction limit — 2.5 ounces of plant material and 15,000 mg of THC in non-plant products
- Caregivers are not permitted to purchase in bulk (the four-day option is for patients only)
- It remains both the caregiver's and the dispensary's responsibility to ensure transactions do not exceed the daily limit
CTR physicians may also add notes to a patient's Registry profile regarding the types or amounts of products a caregiver may purchase. Both patients and dispensaries must follow the physician's recommendation.
The 90-Day Possession Limit
The 90-day supply is calculated as 90 times the daily transaction limit:
| Product Type | Daily Limit | 90-Day Maximum |
|---|---|---|
| Plant material | 2.5 oz | 14.06 lbs |
| Non-plant THC | 15,000 mg | 1,350 grams |
Key points from the DCC guidance:
- Dispensaries are not required to calculate how much of a patient's 90-day supply has been used
- It is the patient's and caregiver's responsibility to ensure they do not exceed the 90-day maximum
- Patients who buy in bulk (four days at once) must be especially vigilant about tracking their total possession
The 90-day fill period starts from the issuance date of the patient's active CTR physician recommendation. A patient cannot purchase more than a 90-day supply during any given fill period.
What's Been Eliminated
The DCC removed several components of the old system that were sources of confusion for patients and dispensaries:
- Tier I and Tier II flower categories — no more separate limits based on THC percentage
- 2.83-gram "whole day units" — flower is no longer required to be packaged in WDU increments
- 45-day fill periods — the two-period structure within each 90-day cycle is gone
- Day's supply calculator — the DCC explicitly states this tool "is no longer a useful reference" and that patients and dispensaries should focus solely on the daily transaction limits
For OARRS reporting purposes, every product is now calculated as one day's supply. The details of each product purchased must still be reported, but the complex per-product day calculations are over.
Is Your Ohio Medical Card Still Worth It?
With the daily transaction limit now matching what recreational consumers can buy (2.5 oz/day), some patients may wonder whether their medical marijuana card still provides value. The answer is clearly yes — and the new rules actually strengthen the case.
Exclusive bulk purchasing. Medical patients can buy up to four days' worth at once (10 oz plant, 60,000 mg THC). Recreational buyers cannot. For patients managing severe conditions who prefer fewer dispensary visits, this is a meaningful convenience.
10% excise tax savings. Medical patients remain fully exempt from Ohio's 10% excise tax on cannabis. At $300 per month in dispensary purchases, that saves $360 per year — more than covering the cost of your card.
Access at age 18. Recreational cannabis requires age 21. Medical patients can access the program at 18, and minors can participate through a designated caregiver.
Priority dispensary service. Many Ohio dispensaries maintain dedicated medical patient service areas, and dispensaries are required to prioritize medical patient access during supply shortages.
Employment protections. Medical patients retain documentation of physician-recommended cannabis use, which carries legal weight in employment and custody contexts — especially relevant after SB 56's changes to recreational consumer protections.
If you are currently buying cannabis recreationally and have a qualifying condition, switching to a medical card could save you hundreds of dollars per year while giving you bulk purchasing privileges no recreational consumer has.
How to Take Advantage of the New Limits
Already a registered patient? The new limits apply automatically starting March 24, 2026. No action is required on your part — simply visit any licensed dispensary and purchase under the new daily transaction system. If your card needs renewal, now is a good time.
Not yet registered? Ohio's medical marijuana program has a $0 state registration fee and accepts telehealth evaluations. You can schedule a same-day evaluation with a licensed Ohio physician and have your card within days.
Get Your Ohio Medical Marijuana Card — Schedule Your Evaluation
Frequently Asked Questions
How much medical marijuana can I buy per day in Ohio?
As of March 24, 2026, patients can purchase up to 2.5 ounces of plant material and 15,000 mg of THC in non-plant products per day. Patients also have the option to buy up to four days' worth at once — 10 ounces of plant material and 60,000 mg of THC.
What is the 90-day supply limit for Ohio medical marijuana?
The 90-day limit is 14.06 pounds of plant material and 1,350 grams of total THC for non-plant products. Dispensaries are not required to track your remaining allotment — it is the patient's responsibility to stay within the limit.
Can I buy medical marijuana in bulk in Ohio?
Yes. Medical patients can purchase up to four days' worth of cannabis in a single transaction. This bulk purchasing option is exclusive to medical patients — recreational consumers cannot purchase more than the daily limit at once.
What is the daily transaction limit in Ohio?
The daily transaction limit is 2.5 ounces of plant material for vaporization and 15,000 milligrams of total THC content for all other products. This applies to both medical and recreational purchases as a per-day maximum.
How much can a caregiver purchase in Ohio?
Caregivers are limited to the daily transaction amount — 2.5 ounces of plant material and 15,000 mg of THC per day. Unlike patients, caregivers cannot buy in bulk (four days at once).
Is an Ohio medical marijuana card still worth it in 2026?
Yes. While the daily limit now matches recreational amounts, medical patients retain exclusive benefits: bulk purchasing (4 days at once), 10% excise tax exemption ($360+/year savings at typical spending), access at age 18, priority dispensary service, and documented medical use for employment protections.
What happened to whole day units in Ohio?
The DCC eliminated the whole day unit (WDU) system effective March 24, 2026. Flower is no longer sold in 2.83g increments, the Tier I/II system is gone, and the day's supply calculator is obsolete. The new system uses a simple daily transaction limit.
When do the new Ohio purchase limits take effect?
The new daily transaction limits take effect March 24, 2026, pursuant to OAC 1301:18-8-09. The DCC announced the changes on March 16, 2026.
Ohio Medical Marijuana Resources
- Get your Ohio medical marijuana card
- Ohio qualifying conditions
- Find Ohio dispensaries
- Ohio medical marijuana doctors
- Ohio marijuana laws
- Ohio card renewal
- Ohio cannabis prices
- Ohio caregiver information
- Ohio medical marijuana history
- Ohio SB 56 explained
Source: Ohio Division of Cannabis Control — Medical Cannabis Daily Limits & 90-Day Supply Guidance (March 2026), pursuant to Ohio Administrative Code 1301:18-8-09.
Have questions about your Ohio medical marijuana card? Contact MMJ.com patient support at 1-833-MMJ-8178 or schedule your evaluation today.
About the Author
This article was written by the MMJ.com Medical Team, a group of licensed healthcare professionals specializing in medical cannabis certification. Our team has helped over 10,000 patients obtain their medical marijuana cards.