How to measure and order: planting quantities and top-ups

Use the matching calculator

Tapered Pot Fill around Root Balls Calculator Separate Seed Product Bag Order Calculator Measured Tree Ring Mulch Top Up Bag Calculator Plant Count from Supplied Grid and Margins Calculator

Use this decision sequence

Measure the pot at your chosen fill level, supplied root-ball displacement, annular mulch zones and rectangular planting beds.
Use selected bag volume or mass, a seed label rate and your supplied planting margins and spacing. No species, mulch depth or sowing rate is chosen.
Run each matching calculation and keep different products as separate purchase items.
Check whole packs, stock remnants and delivery rounding before placing an order.

Keep the quantities distinct

Quantity or assumption	How to use it
Measured need	Measure the pot at your chosen fill level, supplied root-ball displacement, annular mulch zones and rectangular planting beds.
Product basis	Use selected bag volume or mass, a seed label rate and your supplied planting margins and spacing. No species, mulch depth or sowing rate is chosen.
Purchase rounding	Whole packs, rolls and stock lengths can exceed the exact material need.

Worked comparison

Two cylindrical pots 0.4 m in diameter and filled to 0.3 m hold approximately 75.4 L together. Empty-pot capacity would require eight 10 L bags. Subtracting a measured 10 L root ball from each leaves approximately 55.4 L of new mix, or six bags.

Check before using the estimate

Use actual displacement and equivalent loose bag volume. Pot taper, drainage material, compaction and existing mix must be measured rather than silently assumed.

All dimensions, product properties, prices and specifications in this example are illustrative arithmetic inputs. Use the values from your measured plan, selected product data sheet and supplier quote. This guide does not choose construction specifications or certify safety.