Stem Count Calculator

Secondary flowers aren't a percentage you enter directly — the calculator takes whatever share is left over after subtracting your focal, filler, and greenery percentages from 100% and assigns that remainder to secondary flowers. So if you set focal at 25%, filler at 30%, and greenery at 20%, secondary automatically fills the remaining 25%, which keeps the four categories always summing back to exactly the base stem count regardless of how you split the other three.

Base stem count comes from stems-per-inch times diameter times a 1.5 scaling factor, so it scales linearly with diameter rather than with the arrangement's area (which would scale with diameter squared). The 1.5 factor is there to roughly account for the extra depth of stems needed as an arrangement grows, not just its width, but because the relationship is still linear in diameter, doubling the diameter roughly doubles the stem count rather than quadrupling it.

Design style sets the stems-per-inch multiplier at the very start of the calculation — 0.5 for modern/minimal up to 2.0 for lush/overflowing, a fourfold range. Since every other calculation (focal, filler, greenery, and secondary splits, plus the waste buffer) is derived proportionally from that base count, switching from modern to lush at the same diameter and percentages will roughly quadruple every stem count in the results, not just the total.

Total stems per arrangement is what actually ends up in the finished piece; the waste/breakage percentage is applied on top of that and rounded up to get the order quantity per arrangement, since real flowers arrive with some damaged or unusable stems. The waste buffer stems reported is simply the difference between what you ordered in total (order quantity times number of arrangements) and what you'd actually use if every stem were perfect — it's your cushion for loss, not stems that show up in the final arrangement.