What is being measured?
Comparison uses the midpoint of the published 3–4 ft range. Plant-height range in the species profile. Growth varies with conditions; this is a horticultural range midpoint, not a population mean.
The comparison uses the midpoint of the stated range. That midpoint is a chosen reference, not a measured population mean.
- Dimension
- plant height
- Reference value
- 3.5 ft
- Evidence
- Chosen midpoint of a documented range
- In metres
- 1.0668 m
- Source range
- 3–4 ft
- What the range means
- Plant-height range in the species profile.
Put the length in perspective
One Purple coneflower represents approximately 12.5 card lengths measured end to end. This is a length ratio; it does not calculate how the objects pack or fit.
Purple coneflower · 1.0668 m
Metre · 1 m
Foot (international) · 0.3048 m