Garden & Soil
11 articles · Raised bed soil, composting, planting guides
Building a thriving, frugal organic garden starts from the ground up, literally. Aligned with USDA NRCS soil taxonomy parameters, our Raised Bed Soil Calculator helps you estimate precise bulk volume soil displacement, ensuring your organic beds maintain the perfect porosity, drainage, and cost-efficiency.
🧪 Soil pH Quick Reference
The pH targets that keep raised bed vegetables thriving — peat moss, coco coir, and the ideal vegetable garden range, pulled live from the toolFacts data layer.
Soil pH Guidelines at a Glance
| Material / Range | pH |
|---|---|
| Peat moss pH range | 3.5–4.5 pH |
| Coco coir pH range | 5.5–6.5 pH |
| Vegetable garden ideal pH range | 6–7 pH |
pH values sourced from the toolFacts data layer (USDA NRCS-referenced). Test your bed annually and amend toward the vegetable range.
Step 1 — Build the Frame
Step-by-step from material list to finished frame — cedar vs pine vs pressure-treated, why depth matters, and the cardboard bottom trick.
Step 2 — Free Inputs
Turn kitchen scraps and yard waste into free compost — the most expensive ingredient in Mel's Mix. Hot vs cold methods, best bin types, and when it's ready.
Step 2.5 — Pick Your Scenario
New bed, year-2 refresh, wet climate, tight budget, or deep bed — each needs a different ratio. This decision guide walks through all five scenarios with exact recommendations.
Step 3 — What Goes In
The 1/3-1/3-1/3 formula explained, why garden soil fails in raised beds, peat vs coco coir pH difference, and cost breakdown per bed.
Step 3.5 — Ratio Math
Three specific ratio recipes for different conditions — all-purpose 40/40/20, high-drainage, and nutrient-rich — plus exact volume math per bed size.
Step 4 — How Deep to Build
Depth chart for 30+ vegetables, 6 vs 12 vs 18 inch beds compared, hugelkultur for cutting deep-bed costs, and special rules for beds on concrete.
Pro Tip — Save 60% on Soil
Don't fill an 18-inch bed with expensive soil. Use rotting wood and organic debris to build a self-fertilizing base that lasts for years.
Understanding Amendments
What each one actually does, when to add it, and why skipping compost is the most common raised bed mistake — not buying fertilizer.
Foundation Read
Why bagged "garden soil" is the wrong product, the Mel's Mix ratio, and cheaper alternatives that perform just as well.
Step 5 — Budget the Fill
The cost math for compost, coir, vermiculite, bulk soil, and filler layers before you start buying bags.
Put It All Together
Which vegetables produce the most value per square foot for first-year gardeners — now that the soil is right.
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🌱 Raised Bed Soil Calculator
Enter your bed dimensions and get exact cubic footage for each component — compost, coco coir, vermiculite — before you buy a single bag.