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Empty pot capacity versus fill around a root ball.

Container capacity is larger than the amount of new mix needed when an existing root ball occupies part of the vessel.

Calculate two independent purchase scenarios

Prefilled values are illustrative. Replace measurements and product data on both sides. Quantities with different units or different products cannot be combined. Open a result in its calculator to save it to your material project.

Empty-pot capacity basis

Tapered Pot Fill around Root Balls Calculator

Where to get this value

Enter your own allowance. Presets are input shortcuts, not a construction recommendation.

Measured item 1
Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

New mix around measured root balls

Tapered Pot Fill around Root Balls Calculator

Where to get this value

Enter your own allowance. Presets are input shortcuts, not a construction recommendation.

Measured item 1
Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

A worked purchase 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.

Use your measurements and selected products

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.

Tapered Pot Fill around Root Balls Calculator

Subtract supplied root-ball displacement from the selected tapered pot fill volume, then order mix bags.

Separate Seed Product Bag Order Calculator

Order separate seed products using their supplied label rate and pack mass; no seed type or application rate is recommended.

Measured Tree Ring Mulch Top Up Bag Calculator

Top up measured annular areas from existing to supplied target depth, excluding the central circle. Does not recommend depth or trunk clearance.

Plant Count from Supplied Grid and Margins Calculator

Count planting positions on a supplied rectangular grid after measured edge margins. Does not select plant spacing or species.

What makes the comparison valid?

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

Illustrative quantities above are not market prices or construction recommendations. Compare actual permitted scenarios independently and keep alternative orders separate.

Next steps

Manufacturer reference for product data

Reviewed 5 October 2026. Search demand has not been measured.