When to plant Bee balm 'Cambridge Scarlet'?
Best month and method — Monarda 'Cambridge Scarlet'
Plant your bee balm 'Cambridge Scarlet' in March, April, May, September and October — the optimal month is usually May.
You're in the planting season right now — a good moment to start.

Spacing
45 cm
≈ 5 plants
For an X m² border, calculate: X × 5 plants.
Step by step: plant bee balm 'Cambridge Scarlet'
Plant Monarda 'Cambridge Scarlet' between March and May or in September and October, when the soil is workable and not waterlogged. This perennial thrives in full sun or partial shade, though flowering is most prolific with at least six hours of direct sunlight daily. Choose a spot with good air circulation to reduce the risk of mildew, which bergamot is prone to in still, humid conditions. The plant prefers loam or clay soil that holds moisture without becoming waterlogged. Before planting, dig in plenty of organic matter—well-rotted compost or manure—to improve structure and water retention, especially if your soil is heavy clay. Aim for a pH between slightly acidic and neutral. Space plants 45 cm apart to allow for their mature spread of 40–60 cm and to ensure adequate airflow around the foliage. Dig a hole slightly larger than the root ball, place the plant so the crown sits at soil level, and backfill with the excavated soil mixed with compost. Firm gently to eliminate air pockets. Water thoroughly immediately after planting to settle the roots, then keep the soil consistently moist for the first few weeks while the plant establishes. Apply a 5 cm layer of organic mulch around the base, keeping it clear of the crown to prevent rot. Mulch helps retain moisture and suppresses weeds, both important for young monarda. If planting in autumn, mulching also offers a degree of frost protection, though this hardy perennial (zone 4–9) rarely needs it in temperate Europe.