Garden Bed Math · Layer fill plan
Tall raised bed layer fill plan
Bed: Date:
| # | Step | Done | Date |
|---|---|---|---|
| 1 | Inside L x W (ft) and height (in) | ||
| 2 | Under 17 in: all soil, stop here | ||
| 3 | Open ground: wood depth = height ÷ 2 | ||
| 4 | Paving: keep 12 in of soil on top | ||
| 5 | Soil cu ft = L × W × soil depth ÷ 12 | ||
| 6 | Bags = cu ft ÷ bag size, round up, add 2 | ||
| 7 | Logs, branches, twigs, leaves in the gaps | ||
| 8 | Water and tamp every layer | ||
| 9 | Soil and compost to the rim, water in | ||
| 10 | Measure the gap each fall, top up |
Notes:
Source: Oklahoma State Extension HLA-6478, hugelkultur, checked October 10, 2026. Planning record, not a guarantee. Frame strength: ask a carpenter. · gardenbedmath.com/soil/fill-a-tall-raised-bed/