Free · no account required

Garden tools that keep the useful context.

Calculate, plan, observe, and print without hiding the unit, formula, source, date, location, or uncertainty that gives a number meaning.

Available now

Start with the job you need to do.

Choose a quick start or jump to a category. Every tool keeps its formulas, units, sources, privacy notes, and limitations visible on its own page.

New flagship tool

Science-Backed Compost Builder

Plan a compost pile from available materials, estimate C:N and moisture, and track the batch from heating through curing.

Build and track a compost batch
Available

Raised Garden Bed Soil Calculator

Calculate rectangular bed area, soil volume, whole containers, and geometric plant spacing in metric or imperial units.

Calculate soil for a garden bed
New soil measurement

Soil Infiltration Ring Test

Time one to five single-ring trials with USDA 3-inch or 6-inch setup guidance, or calculate a custom ring's water volume from its known inner diameter and target depth.

Measure soil surface infiltration
Expanded measured-runtime tool

Measured Watering Runtime & Volume

Use measured whole-zone flow to calculate total volume, runtime for a selected volume, or runtime for a geometric depth.

Build a measured watering record
Focused calculator

Applied Water Depth Calculator

Convert an entered water volume over a garden, raised bed, or small plot into geometric equivalent depth in millimetres and inches.

Calculate equivalent water depth
New focused calculator

Drip Irrigation Output Calculator

Calculate total point-emitter flow and runtime volume from the actual emitter count and an explicitly measured, manufacturer-rated, or unknown-source rate.

Calculate point-source drip output
New private organization

Garden Subjects

Name a bed, container, tree, shrub, lawn area, or indoor growing area once, then optionally link future measurement records to its stable on-device profile.

Manage garden subjects
New private record

Garden Measurement Record

Save moisture, rainfall, temperature, pH, Brix, harvest, or another numeric value with its unit, method or instrument, exact garden position, conditions, source note, repeat number, and date.

Record a garden measurement
Private evidence hub

My Garden Evidence

Review measurements, water calculations, observations, and repeated histories linked to one saved Garden Subject.

Open My Garden Evidence
Available

Weekly & Monthly Garden Planner

Choose only the plants, areas, measurements, activities, and observation fields you want, then print a reusable garden record.

Build a garden planner
Available

Soil Test Organizer

Copy laboratory results while keeping analyte names, values, units, methods, flags, sample context, and report dates attached.

Organize a soil-test report
New

Garden Problem Observation Record

Record symptoms, patterns, timing, moisture context, recent actions, comparisons, and photo filenames before seeking a diagnosis.

Start a plant observation record
New private record

Compost Temperature Log & Batch Record

Record temperatures with probe position, moisture, odor, turns, rainfall, water, additions, and notes without receiving recommendations or certification claims.

Start a compost temperature log
Applied evidence

Understand the result before acting on it.

These question-led guides connect a calculation or record to the science, assumptions, and limits behind it.

New compost guide

How Do I Know When Compost Is Ready to Use?

Use reheat response, texture, odor, recognizable feedstocks, curing context, and intended-use sensitivity together instead of declaring compost finished from one number of days.

Use the compost maturity guide
New guide

How Much Soil Do I Need for a Raised Garden Bed?

Use inside dimensions and fill depth to calculate volume, convert to cubic yards or litres, round whole bags, and choose a settling allowance without treating it as a guarantee.

Read the raised-bed soil guide
New measurement guide

How to Measure Garden Hose Flow Rate

Use a calibrated bucket and stopwatch to measure litres or U.S. gallons per minute from the faucet, hose, nozzle, filter, timer, injector, sprinkler, or other configuration you actually use.

Run a bucket-and-stopwatch test
New watering guide

How Do I Know When My Garden Needs Water?

Check several root-zone locations, interpret soil feel or meter readings in context, then verify wetting depth and record what happened instead of following a fixed calendar.

Check soil moisture before watering
New observation guide

What Should I Record When a Garden Plant Looks Unhealthy?

Preserve plant identity, the exact symptom or sign, pattern, timeline, root-zone and site conditions, recent actions, comparison plants, and photographs before seeking a diagnosis.

Record a plant problem before diagnosis
Soil guide

How to Read a Soil Test Without Overclaiming

Keep the value attached to its unit, method, reporting basis, laboratory flag, sample context, and report date before interpreting or comparing it.

Read the soil-test guide
Built for worldwide use

Local answers need local context.

Units stay explicit

The bed and water calculators open in metric units and retain clearly labelled U.S. customary alternatives. Results keep both systems visible, and no unsupported weight-to-volume conversion is performed.

Dates are not guessed

Planting windows, climate zones, regulations, and product directions vary by country and region. Tools preserve the source you choose.

Language can expand safely

Stable labels, formulas, boundaries, and structured records provide a foundation for reviewed translations without creating unsourced advice pages.

Regional entryGarden measurement tools for the Philippines.

Open the English-first Philippines page for metric-ready soil, raised-bed, rainfall, and garden-water tools. No precise location or external weather data is required.

Open Philippines Garden Tools
Controlled Harris County referenceSeasonal date information with its source and limits attached.

The reviewed records apply only to Harris County, Texas. They do not determine whether current weather, soil or microclimate conditions are suitable, and TerraEvidence will not substitute Harris County dates for an unsupported location.

Open the Harris County planting date reference
Raised-bed watering runtime

Calculate runtime from measured whole-zone flow.

Use a measurement-first guide that keeps geometric volume, flow evidence, setup context, formula, and limitations together.

Measurement boundary

The result does not determine plant-water need, watering frequency, uniform distribution, infiltration, or root-zone delivery.