Cannabis Yield Calculator Canada
Estimate how much cannabis you can harvest from your grow space — and find the best high-yield strains suited to Canadian growing conditions. Works for basement tents, spare rooms, and outdoor plots from BC to Ontario.
Calculate Your Yield
Quick Yield Answers
4x4 tent yield?
8–16 oz
per harvest, LED lighting
Plants per sq ft?
1–2
depending on training
Yield per plant?
1–5 oz
indoor, genetics dependent
2x2 tent yield?
2–4 oz
per harvest, LED lighting
Autoflower yield?
1–4 oz
per plant, 8–10 weeks
How Much Cannabis Can You Grow in Canada?
Under Canadian federal law, adults can grow up to four cannabis plants per household for personal use. Whether you are running a compact 2x2 grow tent in a Toronto apartment or cultivating in a backyard garden in British Columbia, understanding realistic yield expectations helps you plan your grow, choose the right genetics, and make the most of every cycle. Our yield calculator factors in grow space dimensions, lighting type, seed genetics, and your experience level to produce practical harvest estimates — not inflated numbers.
Indoor growers across Canada using LED lighting typically harvest between 0.5 and 1.0 ounces per square foot, while HPS setups can deliver 0.75 to 1.25 oz/sq ft. Autoflowering cannabis seeds allow multiple harvest cycles per year — up to four indoors — making them ideal for maximising annual production within the four-plant limit. Feminized photoperiod strains generally produce larger individual harvests, giving you more per cycle but fewer total cycles annually.
Cannabis Yield Per Square Foot — Realistic Expectations
| Light Type | Yield / sq ft | Best For |
|---|---|---|
| LED | 0.5–1.0 oz | Energy efficiency, full spectrum, lower heat |
| HPS | 0.75–1.25 oz | Maximum intensity, proven results |
| CFL | 0.25–0.5 oz | Small spaces, supplemental light |
| Sunlight (Outdoor) | 0.75–2.0 oz | Highest per-plant potential |
These ranges reflect what well-maintained grows realistically produce. Canadian outdoor growers should note that yields vary significantly by province — southern Ontario and the Okanagan Valley offer longer growing seasons and higher per-plant yields than Alberta or the Prairies. Factors like nutrient management, plant training, and environment control push results toward the higher end.
How to Increase Cannabis Yields in Canada
Select High-Yield Genetics
Strain choice is the most impactful variable. Some genetics are bred specifically for heavy harvests under Canadian conditions.
Shop High Yield Seeds →Apply Training Techniques
LST, topping, and ScrOG can boost yields by 20–40% by spreading the canopy and maximising light exposure.
Read Training Guide →Dial In Your Lighting
More light equals more bud development — up to a point. LED and HPS both produce excellent results when positioned correctly.
Read Lighting Guide →Optimise Nutrition
Consistent feeding through each growth stage prevents deficiencies and ensures buds reach their full weight potential.
Read Nutrient Guide →Best High-Yield Cannabis Strains for Canada
The genetics you choose have the single greatest impact on harvest weight. These strains are proven heavy producers that perform well in Canadian growing environments — whether you are running indoor tents through the winter or taking advantage of a full BC summer. Pair autoflowering seeds with multiple cycles for maximum annual output, or go with feminized photoperiod seeds for the largest single-harvest weight.
Indoor vs Outdoor Yield in Canada
💡 Indoor Growing
- • Typical: 0.5–1.25 oz per sq ft
- • 2–4 harvests per year
- • Full environmental control
- • Year-round growing regardless of province
- • Higher setup cost, lower risk of crop failure
☀️ Outdoor Growing
- • Typical: 1–5+ oz per plant
- • 1 harvest per year (September–October)
- • Free sunlight, lower running costs
- • Larger plants possible in long-season provinces
- • Frost, mold, and pest risks across most of Canada
How Accurate Is This Cannabis Yield Calculator?
Our calculator generates conservative yield ranges grounded in real growing data — not the inflated numbers you sometimes see in marketing materials. The estimates account for grow space dimensions, lighting efficiency, seed type, and experience level. That said, actual harvests are influenced by many additional factors: nutrient management, environmental stability, training techniques, and strain-specific characteristics all play a role.
We intentionally show a range rather than a single number. Newer growers should plan around the lower figure, while experienced Canadian cultivators using high-yield cannabis seeds with proper plant training can consistently reach or exceed the upper estimate. The “optimized” number reflects what skilled growers achieve when premium genetics, dialled-in lighting, and controlled environments come together.
The data behind this calculator draws on industry-standard yield ranges used by home cultivators and commercial growers across Canada. The logic reflects what Canadian growers report when using quality cannabis seeds with proper care in indoor and outdoor environments from coast to coast.
Treat these estimates as a planning baseline. Your results will improve with each cycle as you learn your specific environment and dial in your technique. For the most precise projections, factor in your strain's genetic potential, your lighting setup, and whether you use canopy training methods.
Frequently Asked Questions
How much cannabis can I grow in a 4x4 tent in Canada?
A 4x4 tent (16 sq ft) with LED lighting typically yields 8–16 ounces per harvest for an intermediate grower. First-time Canadian growers can expect 6–12 ounces. Selecting high-yield genetics and applying training techniques like LST or ScrOG will push your results toward the top of that range.
How many plants per square foot for cannabis in Canada?
For autoflowers, plan 1–2 plants per square foot. For feminized photoperiod plants with training, 1 plant per square foot is typical. In a 4x4 tent, most Canadian growers run 4–9 plants depending on pot size and training method. Remember the four-plant legal limit for personal grows.
LED vs HPS yields — which produces more cannabis?
Modern LEDs now match or exceed HPS yields while consuming 30–40% less electricity — a meaningful savings given Canadian hydro rates. HPS delivers 0.75–1.25 oz/sq ft while quality LEDs produce 0.5–1.0 oz/sq ft. The gap has narrowed significantly, and LED advantages in heat management and spectrum tuning make them the preferred choice for most Canadian home growers.
How much does an outdoor cannabis plant yield in Canada?
A single outdoor plant in Canada can yield 1–5+ ounces depending on strain, location, and season length. Southern BC and Ontario offer the longest growing windows with highest per-plant potential. In Alberta, the Prairies, and Quebec, fast-finishing strains and autoflowers are essential because early frosts can cut the season short. High-yield outdoor strains like Big Bud and Critical Mass are bred for heavy harvests.
How do autoflower yields compare to feminized yields?
Individual autoflower plants typically yield less than feminized photoperiod plants (1–4 oz vs 2–8 oz per plant). However, autoflowers complete in 8–10 weeks and allow 3–4 harvests per year indoors, often matching or exceeding annual yields from photoperiod plants. For Canadian growers limited to four plants, running multiple autoflower cycles maximises total yearly production.