Can Argyranthemum (Marguerite Daisy) Stay Outside Year-Round?

Can Argyranthemum (Marguerite Daisy) Stay Outside Year-Round?

Generally, no. Argyranthemum (marguerite daisies) are tender perennials (USDA zones 9–11). In most temperate climates, they cannot survive frost or freezing temperatures outdoors year-round.

Climate Requirements

• Ideal: Mediterranean — mild, wet winters (above 5°C / 40°F); warm, dry summers.
• Cold tolerance: Brief dips to 0°C (32°F) may kill foliage; hard freeze kills roots.
• Heat tolerance: Struggles in humid, hot summers (SE US, tropics) — prone to fungal issues.

Overwintering Strategies (If You're in Zone 8 or Colder)

1. Bring indoors: Pot them; keep in cool (5–10°C / 40–50°F), bright location (sunroom, greenhouse). Water sparingly.
2. Take cuttings: Root 3–4" tip cuttings in late summer; overwinter as small plants indoors.
3. Mulch heavily (Zone 8–9 borderline): Cut back, cover with 30 cm straw/leaves, cloche — unreliable.

In Warm Climates (Zone 10+)

They may persist as short-lived perennials, but often decline after 2–3 years due to woody buildup and heat stress. Treat as annuals or refresh from cuttings.

Best Practice

Enjoy their prolific spring–fall bloom as seasonal container plants. Replace yearly or propagate. Their cheerfulness is worth the effort.