Grow Year-Round.
Indoors. In Canada.
Free calculators and guides to dial in your grow tent — lights, VPD, PPFD, and more.
Indoor Growing Calculators
Everything you need to dial in your grow tent — free, no sign-up required
Grow Light Size Calculator
Find the exact wattage you need for your tent — with light recommendations from Mars Hydro, Spider Farmer, and AC Infinity.
- Tent size → wattage range
- Veg & flower stages
- Monthly electricity cost (CAD)
VPD Calculator
Calculate your Vapour Pressure Deficit and find out if your temp and humidity are dialled in for maximum growth.
- All 4 growth stages
- Ideal RH at your temp
- AC Infinity product picks
PPFD & DLI Calculator
Calculate your Daily Light Integral and find out if your plants are getting enough — or too much — light.
- PPFD → DLI converter
- 6 plant types supported
- Photoperiod optimizer
Grow Tent Size Calculator
How many plants fit in your tent? Get matched to the right size with tent recommendations from AC Infinity, Vivosun, and Mars Hydro.
- Plants → tent size
- AC Infinity & Vivosun picks
- Fan size recommendation
Nutrient & EC Calculator
EC targets, PPM ranges, pH sweet spots, and dosage guides for every growth stage — hydro, coco, and soil.
- EC & PPM targets by stage
- GH Flora Trio dosage guide
- pH targets by medium
Electricity Cost Calculator
Calculate your monthly grow room hydro bill by province — lights, fans, dehumidifiers, all devices.
- All 13 provinces & territories
- Per-device breakdown
- Annual cost projection
Why Indoor Growing Makes Sense in Canada
Long winters. Short seasons. Indoor growing solves both.
🌨️ Grow Through Winter
While outdoor gardens sit frozen from November to April, indoor growers harvest tomatoes, peppers, herbs, and leafy greens year-round — unaffected by Canadian winters.
📍 No Frost Date Limits
Calgary gardeners, Winnipeg growers, northern Ontario — indoor growing removes frost dates from the equation entirely. Your season never ends.
💧 Total Climate Control
Control every variable — light intensity, photoperiod, temperature, humidity, CO₂. No aphids, no slugs, no late frosts. Just consistent, predictable growth.
💰 Real Affiliate Savings
Our calculators link directly to the gear that fixes your numbers — lights, fans, humidifiers, controllers. Canadian pricing, Canadian shipping, no guesswork.
Our Recommended Gear
We only recommend brands we'd use ourselves. All ship to Canada.
Mars Hydro
Top-tier LED grow lights with Samsung & Osram diodes. FC and TSL series are the go-to for Canadian tent growers. Ships to Canada, strong warranty support.
Find Your Light →AC Infinity
The best inline fans, climate controllers, humidifiers, and dehumidifiers for grow tents. CONTROLLER 69 PRO is a must-have for automated VPD management in Canada.
Check Your VPD →Spider Farmer
Foldable bar-style LED grow lights with excellent PPFD uniformity. The SE series is popular with Canadian growers for its adjustable design and Samsung diode quality.
See Recommendations →Disclosure: Some links on this page are affiliate links. We may earn a commission at no extra cost to you. We only recommend products we'd use ourselves.
Indoor Growing Guides
Written for Canadian growers — climate, gear, and growing tips that actually apply here.
Ready to Set Up Your Grow?
Start with the grow light calculator — enter your tent size and get a wattage recommendation and product picks in 30 seconds.
💡 Find My Grow Light