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Can You Grow Calendula in Colorado?

US · USDA Zone 5b · zones 3a, 3b, 4a, 4b, 5a, 5b, 6a, 6b

Grows well here

Calendula grows well here and is one of the easiest, most useful companion flowers — it reseeds freely.

Plant zones

2a–11b

Colorado last frost

early April

Colorado first frost

late October

Days to harvest

50–70 days

When to plant Calendulas in Colorado

Direct sow

Oct 1 – Oct 31

Harvest

Jun – Jul (following year)

Dates are approximate, based on Colorado's average frost dates. Your exact yard may vary by microclimate.

About Calendula

Calendula (pot marigold) is a cheerful, easy annual flower with edible petals — a pollinator magnet and a classic companion plant that repels pests throughout the garden.

Direct sow after last frost or start indoors 4 weeks earlier. Deadhead to keep it blooming. Edible petals brighten salads and are used in natural salves.

Full calendula growing guide →

Gardening in Colorado

Colorado has a semi-arid mountain climate with intense sunshine and low humidity. Front Range cities like Denver are Zone 5-6; higher elevations are Zones 3-4.