This free square foot garden planner helps you plan a square-foot plan for a bed, with cell counts and total plants from your bed size and plants per square. It runs fully in your browser, needs no account, and gives a clear plan in seconds, so you can stop guessing and start with dates and numbers you can trust. It is made for home gardeners, not for professional growers, and every field is explained in plain words on the tool itself.
To use it, fill in the fields above and press the button. The tool checks your numbers, runs the calculation, and shows the result right below the tool, together with a simple drawing of your plan where a drawing applies. If a number looks wrong, change it and press the button again. Nothing is saved on a server, and you can use the tool as many times as you like, for one bed or for many.
It divides your square bed into one-foot cells and multiplies by your plants-per-square choice. A bed with 4 foot sides has 16 cells, because 4 times 4 is 16. Large crops use 1 plant per cell, medium crops use 4, small crops use 9, and tiny crops like radish use 16. The canvas drawing shows the cell grid, so you can assign a different crop to each square and count plants without a spreadsheet.
For example, a 4 foot bed at 4 plants per square gives 16 cells and 64 plants in total. The same bed at 1 plant per square gives only 16 plants, which suits cabbages or peppers, while 9 plants per square gives 81 plants for a 3 foot bed.
Reading the result is simple: take the headline dates or counts as your starting point, then check them against what you know about your own garden. Soil, sun, rain and local frost all change from one garden to the next, so a tool result is a strong guide, not a promise, and your own judgement still matters for the final decision.
Do not mix plants-per-square counts inside one square, because a fast crop will shade a slow neighbour. Keep one crop per square and rotate crops between squares each season.
A common mistake is trusting a single plan and never checking it again. Re-run the tool when your frost dates change, when you change the size of a bed, or when a crop fails, because stale plans quietly lead to crowded beds and missed sowing windows. Keep a short note of each result with the crop name and the date, so you can compare one season with the next without searching through old messages.
Over the next few weeks, use this tool as part of a simple weekly routine. Set aside a short time each week to check your beds, water what needs water, and review what the plan says should happen next. A pattern over several weeks is far more useful than one good or bad day, because it shows which crops grow well in your soil, which beds stay too wet, and where your time actually goes. Small steady habits, repeated every week, build a garden that is easier to run and easier to enjoy, and this tool is meant to make one small part of that routine faster and clearer.
This tool gives estimates for everyday garden planning only and does not replace professional growing advice. Use it to plan, to compare and to keep clear records, and ask a local expert when a decision involves large costs, rare plants or plant health problems. Try it with your own numbers now, and come back whenever a new bed, a new crop or a new season needs a quick, honest plan.