How many stems per arrangement?

A small arrangement uses 6-8 stems, medium 10-14, and large 16-20. Mix focal flowers (roses, peonies), filler flowers (gypsophila, wax flower), and greenery (eucalyptus, fern) for a balanced look.

What are the cheapest flowers for events?

Chrysanthemums, carnations, alstroemeria, and gypsophila are the most affordable flowers in the UK. Buying in-season flowers also saves money. Supermarket bunches can be a budget-friendly option.

How far in advance can I arrange flowers?

Most fresh flowers can be arranged 1-2 days before the event if kept in water in a cool room. Hardy flowers like chrysanthemums last longer. Avoid arranging delicate flowers like sweet peas more than a few hours ahead.

Do I need greenery in arrangements?

Greenery like eucalyptus, ruscus, or fern adds volume and texture at a lower cost than flowers. It fills gaps and makes arrangements look fuller. About 30% greenery to 70% flowers is a good ratio.

PartyCalcs

Flower Arrangement Calculator — Stems & Arrangements

Calculate the number of flower stems and arrangements needed for your event.

Number of Arrangements

Arrangement Size

Cost per Stem (optional)

Include greenery

Add foliage and leaves to arrangements

How We Calculate This

This calculator estimates flower stem quantities based on the number and size of arrangements you need.

The formula

Total stems = arrangements x stems per arrangement

Stems are split into three types: 40% focal flowers (the main blooms), 30% filler flowers (smaller supporting flowers), and 30% greenery (leaves and foliage). Greenery can be toggled off if not wanted.

Frequently Asked Questions

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Last updated: February 2026

All calculations are estimates. Adjust quantities based on your guests and event type.