Master what lives beneath your feet.
Seven soil types, fourteen pH levels, and one balanced ecosystem your garden depends on. Identify, plan, and improve — all in one place.
Seven soil types.
One garden ecosystem.
Tap any type to explore its full profile — characteristics, ideal crops, amendments, and seasonal notes.
Build a custom amendment recipe.
Tell us your soil, your crop, and your goal. We'll generate the exact amendments, quantities, and method.
What is my soil?
Four quick observations about how your soil looks, feels, and behaves — we'll narrow it down.
pH controls everything.
Drag the slider to see how pH changes which nutrients your plants can actually access — and which get locked out.
How healthy is your soil?
Rate six factors from one to five based on what you observe in your garden. We'll compute your score and give a personalized improvement plan.
A profile from leaf litter to bedrock.
Soil is built in distinct layers called horizons. Tap any layer to see its role in the ecosystem beneath your garden.
A season-by-season plan.
What to do with your soil each season to keep it productive, healthy, and alive year-round.
All seven soils at a glance.
Drainage, fertility, workability, water retention, and aeration — compared across every type.
The jar test.
The simplest way to understand your soil's composition — all you need is a mason jar, water, and a couple of days.
Six principles that always apply.
No matter what type of soil you're working with, these habits compound dramatically over time.
Frequently asked.
Common questions about soil types, improvement, pH, and growing — answered clearly.