Free Garden Tools

The Garden Planner’s Toolkit

Every tool here is completely free — no account, no paywall, no email. Enter your ZIP code or garden details and get the exact numbers your garden needs.

4 Live tools
16 Coming soon
0 Signup required

Growing & Design Tools

Plan what to grow, where to put it, what to plant beside it, and when to expect the harvest. We’re building them in the order gardeners ask for them.

Vegetable Garden Planner
Plan your beds visually and get a crop-by-crop plan for the whole plot.
Building Next 60K/mo searches
Companion Planting Tool
What to plant next to what — and which pairings to keep well apart.
Building Next 30K/mo searches
Plant Spacing Calculator
Exact spacing and plants-per-bed for any crop and bed size.
Coming Soon 20K/mo searches
Succession Planting Scheduler
Stagger plantings for a continuous harvest all season long.
Coming Soon 8K/mo searches
Harvest Countdown Calendar
Days-to-harvest for every crop you’re growing, at a glance.
Coming Soon 10K/mo searches
Garden Layout Designer
Drag-and-drop visual designer for raised beds and in-ground plots.
Coming Soon 25K/mo searches
Backyard Zone Planner
Map sun, shade, and zones across your yard to place beds right.
Coming Soon 12K/mo searches

Soil, Fertilizer & Water Tools

Exact amendment quantities for your soil, fertilizer rates by crop and stage, and water needs sized to your beds and climate.

Soil pH Calculator & Amender
Get exact lime or sulfur amounts to hit your target pH for any bed.
Building Next 22K/mo searches
Raised Bed Soil Calculator
Exact cubic feet of soil, compost, and amendments for any bed size.
Building Next 18K/mo searches
Garden Watering Calculator
How much and how often to water, by bed size and summer temps.
Coming Soon 18K/mo searches
Fertilizer Calculator
Exact fertilizer rates by crop and growth stage — no guesswork.
Coming Soon 15K/mo searches
Compost Calculator
Balance your greens and browns for a fast, hot compost pile.
Coming Soon 12K/mo searches
Mulch Calculator
How many bags or cubic yards of mulch your beds actually need.
Coming Soon 15K/mo searches
Lawn Overseeding Calculator
Exact grass-seed quantity and timing for overseeding your lawn.
Coming Soon 14K/mo searches

Pest & Disease Tools

Describe what you’re seeing and get the most likely cause, linked to our full pest and disease guides.

Pest Identifier
Describe the damage — holes, trails, chewed edges — and narrow down the culprit with treatment links.
Coming Soon 35K/mo searches
Plant Disease Identifier
Match spots, wilting, and discoloration to the most likely disease and fix.
Coming Soon 28K/mo searches

Common Questions

Are these tools really free? Do I need an account?
Completely free, no account needed. Enter a ZIP code and get your results — no email gate, no ads inside the tools. They’re built for gardeners, not lead generation.
Where does the data come from?
Zone data is from the USDA Plant Hardiness Zone Map (2023). Frost dates come from NOAA’s 30-year Climate Normals (1991–2020). Both are the official government datasets serious references rely on.
What’s the difference between my zone and my frost dates?
Your hardiness zone tells you which perennials survive winter — use it for trees, shrubs, and perennial flowers. Your frost dates tell you when your annual growing season starts and ends — use them for vegetable timing.
My ZIP code isn’t returning results — what now?
A few new, PO-box-only, or rural ZIPs aren’t in the datasets. Try a neighboring ZIP, or check the official USDA map directly.
Can I embed these tools on my own site?
Please link to them rather than embed — a link gives your readers the full tool plus the guide content. A simple link like “use the OGW frost dates tool” is perfect.
From the OGW Team

We built these because the questions that stump gardeners most aren’t about what to grow — they’re about when. Those have specific, calculable answers, and we got tired of watching gardeners guess.

We’re adding new tools throughout 2026. If there’s a calculation you keep doing by hand, contact us and we’ll prioritize it. Happy growing!