Eight free calculators to help you grow more food with less guesswork.
Everything you need to plan a productive vegetable garden
See exactly how many plants fit in your garden bed with proper spacing.
Find your last spring frost and first fall frost dates for safe planting.
Calculate exactly how much soil you need for raised beds and containers.
Calculate how much water your garden needs per week based on plant type and rainfall.
Find out when your vegetables will be ready to harvest based on planting date.
Calculate how much fertilizer your garden needs based on size and feeder type.
See how much compost you'll produce and money you'll save vs buying bagged compost.
Find the perfect pot size for vegetables, herbs, and flowers for healthy growth.
A 4x8 ft bed can produce 50+ lbs of vegetables. Better to maintain a small garden well.
Tomatoes love basil. Carrots love onions. Plant companions together for better yields.
Planting too early = dead plants from frost. Use our frost calculator to get it right.
Overcrowding leads to disease and poor yields. Use our spacing calculator for best results.
Join thousands of Canadian gardeners using our free tools to grow more food with less effort.
🌱 Get Started FreeCanadian gardeners face unique challenges that generic gardening tools simply 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 — and the constant race against fall frost demand tools that understand Canadian conditions. Every calculator on TheWebCal is built with Canadian cities, Canadian frost data, and Canadian growing seasons in mind.
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.
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.
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.
Calculate lumber, soil, and costs before you build. Raised beds are one of the best investments a Canadian gardener can make — they warm up faster and extend your growing season.
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 balcony or patio.
Turn kitchen scraps into garden gold. Calculate how much compost your household produces and how much money you save versus buying bagged compost each season.