Antirrhinum majus Monaco White Improved | Group 3 | Snapdragon

Monaco White Improved F1 is a professional Group 3 snapdragon developed for high-quality cut flower production. It produces elegant clean white flowers arranged along tall, refined flower spikes, making it an especially versatile colour for wedding work, bouquets and contemporary floral design.

Monaco White Improved is a new improved white selection in the Monaco series. PanAmerican Seed lists it as a new variety for 2027 and recommends Monaco for greenhouse and high-tunnel cut flower production. The variety produces long, strong stems, with stem length reaching approximately 99–152 cm under professional conditions.

As a Group 3 snapdragon, Monaco performs best under moderate daylength and moderate light levels and is particularly useful for transitional growing periods.

Plant Information

• Scientific Name: Antirrhinum majus
• Common Name: Snapdragon
• Variety: Monaco White Improved F1
• Series: Monaco
• Group: Group 3
• Life Cycle: Annual
• Hybrid: F1
• Flower Colour: White
• Plant Habit: Upright
• Stem Length: Approximately 99–152 cm under professional production
• Exposure: Sun
• Blooming Season: Spring, Autumn
• Plug Crop Time: 4–5 weeks
• Transplant to Finish: Approximately 8–10 weeks under suitable conditions
• Vase Life: 7–10 days
• Use: Cut flowers, bouquets, wedding floristry, greenhouse and high-tunnel production
• Seed Form: Raw or pelleted seed

PanAmerican Seed notes that under less-than-optimal seasonal conditions, finishing can take considerably longer, up to approximately 18 weeks.

How to Start from Seed

For best results, start Monaco White Improved indoors and transplant the young plants.

Sow one seed per cell onto the surface of a fine, moist seed-starting mix. Cover only very lightly.

For the Monaco series, young plant production takes approximately 4–5 weeks before transplanting.

After germination, provide the seedlings with plenty of light and good air circulation.

Growing

Plant in a sunny position in fertile, moist but well-drained soil.

Monaco White Improved is particularly suited to greenhouse and high-tunnel production. Professional planting density is approximately 80–106 plants/m².

For producing long, straight cut-flower stems, support netting is recommended as the plants grow.

To Pinch or Not to Pinch?

For production of one long, premium-quality cut flower stem, plants are generally grown without pinching.

If branching and several flowering stems are preferred, young plants can be pinched, although this usually results in shorter individual stems and later flowering.

Harvest

Harvest Monaco stems when approximately 5–6 florets have opened.

After cutting, keep the stems upright to help prevent them from curling. The recommended vase life is approximately 7–10 days.

What Does Group 3 Mean?

Professional cut-flower snapdragons are divided into groups according to the daylength, light and temperature conditions in which they perform best.

Monaco White Improved belongs to Group 3. PanAmerican Seed describes Group 3 Monaco snapdragons as best suited to moderate daylength, moderate light levels and temperatures around 10–13°C.

The Monaco series is particularly valuable for transition harvest periods, including late winter into early spring and late summer into early autumn. It can also perform throughout the year in regions with moderate temperatures and relatively little variation in daylength.

Why Choose Monaco White Improved?

Monaco White Improved combines elegant white flowers with long, strong stems and high-quality flower spikes. White is one of the most versatile colours for floristry, making this variety particularly beautiful for wedding bouquets, neutral arrangements, pastel colour palettes and modern floral designs.

It is an excellent choice for growers looking for a professional white Group 3 snapdragon for high-quality cut flower production.