Outdoor Gardening Calculators
11 free tools to plan your Canadian vegetable garden — from first frost to final harvest.
All 11 Calculators
Garden Planning Calculators
Everything you need to plan a productive outdoor vegetable garden in Canada
Garden Spacing Calculator
See exactly how many plants fit in your garden bed with proper spacing.
- 30+ vegetables & herbs
- Companion planting tips
- Square foot gardening
Frost Date Calculator
Find your last spring frost and first fall frost dates for safe planting.
- 100+ Canadian cities
- Growing season length
- Planting calendar
Soil Calculator
Calculate exactly how much soil you need for raised beds and containers.
- Cubic feet & yards
- Bag calculator
- Cost estimator
Watering Calculator
Calculate how much water your garden needs per week based on plant type and rainfall.
- Weekly water needs
- Rainfall adjustment
- Watering schedule
Harvest Calculator
Find out when your vegetables will be ready to harvest based on planting date.
- 24 vegetables included
- Days to maturity
- Expected yield
Fertilizer Calculator
Calculate how much fertilizer your garden needs based on size and feeder type.
- Synthetic vs organic
- Application schedule
- Cost comparison
Composting Calculator
See how much compost you'll produce and money you'll save vs buying bagged compost.
- Compost produced yearly
- Money saved estimate
- CO₂ reduction impact
Container Size Calculator
Find the perfect pot size for vegetables, herbs, and flowers for healthy growth.
- Minimum pot size
- Soil volume needed
- Recommended containers
Raised Bed Calculator
Calculate lumber, soil, and screws needed to build any size raised garden bed.
- Materials list
- Soil volume & cost
- Multiple wood types
Seed Starting Calculator
Calculate when to start seeds indoors based on your city's last frost date.
- 30+ vegetables
- City-based schedule
- Transplant timing
Mulch Calculator
Calculate how much mulch you need and compare bags vs bulk costs.
- 6 mulch types
- Bags vs bulk pricing
- Coverage estimator
Quick Gardening Tips
🌱 Start Small
A 4×8 ft bed can produce 50+ lbs of vegetables. Better to maintain a small garden well than a large one poorly.
🍅 Companion Planting
Tomatoes love basil. Carrots love onions. Plant companions together for better yields and fewer pests.
❄️ Know Your Dates
Planting too early = dead plants from frost. Use our frost calculator to get the timing right for your city.
🥕 Proper Spacing
Overcrowding leads to disease and poor yields. Use our spacing calculator to plan your beds before you plant.
Garden Planning Tools Built for Canada's Climate
Canadian gardeners face unique challenges that generic tools don't account for. Our short growing seasons, wide regional variation — from Vancouver's mild winters to Calgary's late frosts and Winnipeg's brutal cold — demand tools that understand Canadian conditions. Every calculator here is built with Canadian cities, Canadian frost data, and Canadian growing seasons in mind.
❄️ Canadian Frost Dates
Find your last spring and first fall frost dates for cities across Canada — from Victoria to St. John's. Know exactly when it's safe to plant and when to harvest before frost hits.
🌱 Seed Starting Schedules
Starting seeds indoors is how Canadian gardeners beat the short season. Our seed starting calculator counts backward from your frost date to tell you exactly when to start each vegetable.
🥕 Plant Spacing & Yields
Maximize production from every square foot with proper spacing for 30+ vegetables. Know how many plants fit your bed before you buy seeds or transplants.
🪵 Raised Bed Planning
Calculate lumber, soil, and costs before you build. Raised beds warm up faster and extend your growing season — one of the best investments a Canadian gardener can make.
🪴 Balcony & Container Growing
No backyard? No problem. Our container size calculator helps apartment and condo gardeners find the right pot for tomatoes, peppers, herbs, and more on any Canadian balcony.
♻️ Composting & Soil Health
Calculate how much compost your household produces and how much money you save versus buying bagged compost. Great for Canadian winters when the pile freezes and slows down.
Growing Guides for Canadian Gardeners
Expert advice written for Canada's climate, zones, and short season.
💡 Indoor Growing Calculators
Grow year-round regardless of season. 6 free tools for grow lights, VPD, tent sizing, nutrients, and electricity costs by province.
Ready to Plan Your Garden?
Join thousands of Canadian gardeners using our free tools to grow more food with less effort.
🌱 Get Started