Flower growing guide
Calendula
Calendula officinalis
Sun
Full sun
Season
Cool
Maturity
50 to 60 days
Water
Moderate
Soil pH
6.0 to 7.0
Spacing
8 to 12 in
Planting calendula
Sow directly in early spring as soon as the soil can be worked, or start indoors 4 to 6 weeks early. Calendula tolerates light frost and slows down in summer heat.
Planting details
- Sow again in late summer where autumns are mild
- Spacing: 8 to 12 inches
- Seed depth: about 1/2 inch
Growing requirements
Calendula blooms best in cool weather with full sun and ordinary, well-drained soil. It is one of the few annuals that shrugs off light frost, which makes it useful at both ends of the season.
Harvesting and care
Deadhead often and plants keep flowering until a hard freeze. Let a few heads dry on the plant at season end for free seed.
Common mistakes
- Rich soil and heavy feeding, which favor leaves over flowers
- Expecting nonstop bloom through summer heat in warm climates
- Letting aphids settle in unchecked, since calendula attracts them
Companion plants
Calendula tucks along vegetable bed edges and between greens, where its blooms draw pollinators and the petals can go straight into salads.