All Gardening Calculators

21 free tools powered by USDA zone data and agricultural research.

📅Planning & Timing

Know exactly when to plant, start seeds, and harvest in your zone.

📅

Planting Dates

When to plant by ZIP code

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Frost Dates

First and last frost by ZIP

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Growing Season

Season length by zone

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Succession Planting

Stagger for continuous harvest

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Seed Starting

When to start seeds indoors

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Harvest Date

When your crop will be ready

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📐Garden Design

Plan your beds, calculate soil, and figure out spacing.

🪴

Soil Calculator

How much soil for your bed

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Bed Layout

Plan your raised bed layout

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Square Foot Garden

SFG spacing planner

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Seed Spacing

How many plants fit

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Container Garden

Pot size and plant count

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Mulch Calculator

Mulch and compost volume

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💧Plant Care

Keep your plants healthy with the right companions, nutrients, water, and light.

🤝

Companion Planting

What grows well together

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Fertilizer

NPK ratios for your plants

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Watering Schedule

How much and how often

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Sunlight Guide

Match plants to your light

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Soil pH

pH matching and amendments

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Pest Guide

Identify and treat pests

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🥕Harvest & Yield

Estimate yields, preserve your harvest, and calculate savings.

⚖️

Yield Estimator

Expected harvest weight

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Canning Calculator

Jars needed for preserving

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Cost Savings

Garden vs grocery savings

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Quick Jump

📅 Planning & Timing 📐 Garden Design 💧 Plant Care 🥕 Harvest & Yield