Why one height figure is not enough
Two mature Ficus trees described as four metres high can differ greatly in crown width, clear trunk, trunk character, aerial-root development and transport requirements. A professional sourcing record therefore needs a repeatable measurement method rather than a single approximate number.
The core measurements
- Overall height: measure from the prepared root-ball or container level to the highest living point.
- Crown spread: record the widest axis and a second axis at right angles. This reveals whether the crown is broad, narrow or uneven.
- Clear trunk height: record the distance from ground level to the main crown where this matters to circulation or sight lines.
- Trunk girth: agree where the tape will be placed. For irregular multi-stem trees, photographs and a written method are essential.
- Root ball or container: record width, depth and preparation status because these dimensions affect lifting, freight and the receiving pit.
Show the measurement, not only the result
Each figure should be supported by a photograph showing the tape position and unit. Use a full-tree view with a visible scale reference, then provide close views of the trunk, root flare, aerial roots and root ball. Record the date because pruning and preparation may change the dimensions.
Keep the method consistent across candidates
Comparison becomes unreliable when different nurseries measure from different points. Use one specification sheet, one unit system and the same photograph angles for every candidate. Separate measured facts from visual judgments such as balance, density and character.
Before approving a tree
Confirm whether the measurement describes the tree before or after preparation, how much pruning is expected, and whether substitutions require approval. Carry the tree ID and measurement record through selection, preparation and loading.
Frequently asked questions
Should crown width be measured once?
No. Mature crowns are rarely circular. Two perpendicular measurements give a more useful picture.
How should a multi-stem Ficus be measured?
Record the agreed method in writing and add detailed photographs. A single girth number without context can be misleading.
Can photographs replace measurements?
No. Photographs show form and condition; measurements establish scale. Professional selection needs both.