Gardening Calculators – Your Master Toolkit

Gardening Calculators
Every Gardeners Master Toolkit

30+ Professional, interconnected calculators and planners. Take the guesswork out of planting, maintaining, and harvesting your perfect garden. We automatically remember your specs for next time!

Smart Auto-Save

Urban Space & 2026 Trends

“Small-Space Flavor” Predictor

“Silent Scape” Privacy Screen

Square Foot Garden (SFG)

Location, Climate & Sun

USDA Zone Finder

Sunlight Crop Matcher

Grow Light Monthly Cost

Advanced Planting & Harvesting

Next Best Lunar Date

Lunar Planting Guide

Seed-Starting Scheduler

Target Harvest Planner

Full Season Succession

Fall Frost Planting

Soil, Compost & Amendments

Hugelkultur Bed Builder

Worm Farm / Vermicompost

Soil pH Adjuster

Compost C:N Balancer

Organic Soil Amendment

Bulk Mulch/Soil Volume

Plant Spacing Calculator

Raised Bed Soil Calculator

Watering Calculator

Fertilizer Rate Calculator

Germination Rate

Potting Soil Volume

Harvest Date Calculator

Lawn Mowing Time

Yield Estimator

Row Planting Calculator

Spray Dilution Calculator

Companion Planting Guide

Seed Packet Decoder

Gardening Calculators
Every Gardeners Master Toolkit

Urban Space & 2026 Trends

“Small-Space Flavor” Predictor

“Silent Scape” Privacy Screen

Square Foot Garden (SFG)

Location, Climate & Sun

USDA Zone Finder

Sunlight Crop Matcher

Grow Light Monthly Cost

Advanced Planting & Harvesting

Next Best Lunar Date

Lunar Planting Guide

Seed-Starting Scheduler

Target Harvest Planner

Full Season Succession

Fall Frost Planting

Soil, Compost & Amendments

Hugelkultur Bed Builder

Worm Farm / Vermicompost

Soil pH Adjuster

Compost C:N Balancer

Organic Soil Amendment

Bulk Mulch/Soil Volume

Plant Spacing Calculator

Raised Bed Soil Calculator

Watering Calculator

Fertilizer Rate Calculator

Germination Rate

Potting Soil Volume

Harvest Date Calculator

Lawn Mowing Time

Yield Estimator

Row Planting Calculator

Spray Dilution Calculator

Companion Planting Guide

Seed Packet Decoder

GARDENING APP

FREE INSTANT ACCESS

Urban Space & 2026 Trends

“Small-Space Flavor” Predictor Estimates crop yield and retail savings for small-space container gardening.

“Silent Scape” Privacy Screen Calculates the plants needed to block an eyesore or noise.

Square Foot Garden (SFG) Shows optimal plant density for a 1×1 ft square foot gardening grid.

Location, Climate & Sun

USDA Zone Finder Finds your hardiness zone using your US ZIP code. Data reflects the updated 2023 USDA Plant Hardiness Zones and average annual coldest temperatures from 1991-2020. (It is normal for this data to not update yearly. Prior USDA update was in 2012.)

Sunlight Crop Matcher Matches plants to your available daily direct sunlight hours.

Grow Light Monthly Cost Estimates the monthly electricity cost for your grow lights.

Advanced Planting & Harvesting

Next Best Lunar Date Finds the upcoming optimal moon phase for your specific garden tasks.

Lunar Planting Guide Provides traditional gardening advice based on the moon phase for a specific date.

Seed-Starting Scheduler Calculates indoor and outdoor sowing dates based on the last spring frost.

Target Harvest Planner Determines when to sow seeds to have them ready by a specific target date.

Full Season Succession Generates a schedule for staggered plantings to ensure a continuous harvest.

Fall Frost Planting Finds the latest safe planting date before the first fall frost hits.

Soil, Compost & Amendments

Hugelkultur Bed Builder Estimates the volume of logs, greens, and topsoil needed for a raised mound.

Worm Farm / Vermicompost Calculates the required worms and bin size for your weekly kitchen waste.

Soil pH Adjuster Calculates the amount of amendments needed to raise or lower your soil’s pH.

Compost C:N Balancer Analyzes the carbon-to-nitrogen ratio of your custom compost mix.

Organic Soil Amendment Recommends natural organic fertilizers based on your soil’s primary nutrient needs.

Bulk Mulch/Soil Volume Figures out how much material is needed to cover an area.

Plant Spacing Calculator Tells you how many plants fit in a given area.

Raised Bed Soil Calculator Calculates how much soil is needed to fill a raised bed.

Watering Calculator Converts inches of water over an area into gallons needed.

Fertilizer Rate Calculator Determines pounds of fertilizer needed based on target nutrients.

Germination Rate Calculates the percentage of seeds that successfully sprouted.

Potting Soil Volume Estimates dry quarts in a round planter pot.

Harvest Date Calculator Adds days to a planting date to estimate harvest readiness.

Lawn Mowing Time Estimates mowing time from area and deck width.

Yield Estimator Estimates total harvest pounds from plants and average yield.

Row Planting Calculator Calculates total plants for a set row length, row count, and crop spacing.

Spray Dilution Calculator Converts product label rate into ounces/teaspoons for smaller sprayers.

Companion Planting Guide Shows suggested companion plants and plants to avoid for a crop.

Seed Packet Decoder A quick guide for interpreting common seed packet abbreviations and details.

GARDENING APP

FREE INSTANT ACCESS

“Small-Space Flavor” Predictor

“Silent Scape” Privacy Screen

Square Foot Garden (SFG)

USDA Zone Finder

Sunlight Crop Matcher

Grow Light Monthly Cost

Next Best Lunar Date

Lunar Planting Guide

Seed-Starting Scheduler

Target Harvest Planner

Full Season Succession

Fall Frost Planting

Hugelkultur Bed Builder

Worm Farm / Vermicompost

Soil pH Adjuster

Compost C:N Balancer

Organic Soil Amendment

Bulk Mulch/Soil Volume

Plant Spacing Calculator

Raised Bed Soil Calculator

Watering Calculator

Fertilizer Rate Calculator

Germination Rate

Potting Soil Volume

Harvest Date Calculator

Lawn Mowing Time

Yield Estimator

Row Planting Calculator

Spray Dilution Calculator

Companion Planting Guide

Seed Packet Decoder