A cool-season annual that produces a long succession of vivid orange and yellow flowers edible raw or dried, with minimal care.
Calendula officinalis · also called pot marigold, common marigold
Windows are counted from the average date of your last spring frost.
Calendula blooms from late spring through frost when deadheaded regularly, supplying edible petals for salads and teas while attracting beneficial insects. It is one of the most forgiving annuals for a first-season gardener.
A little history. Native to the Mediterranean basin and documented in cultivation since at least the 12th century. A true annual completing its life cycle in one season; the resin-coated seeds are distinctively curved and hooked, aiding dispersal.
Sow seeds ¼ inch (6 mm) deep, and aim for 12 inches (30 cm) between plants once thinned. Cover seeds with ¼ inch of soil — they need darkness to germinate. Keep the seedbed evenly moist until sprouts appear. Seedlings emerge in 5–14 days.
Water deeply once or twice a week; reduce frequency once plants are established. Water when the top inch of soil feels dry to the touch. Aim for about 1 inch per week including rain.
Apply once at planting, then side-dress (scatter fertilizer along the row and water in) every 4–6 weeks. What to use: low-nitrogen balanced fertilizer or compost; excess nitrogen promotes foliage over flowers.
Pinch out the central growing tip when seedlings reach 6 inches to encourage branching. Deadhead (remove spent blooms) every few days to prevent seed set and extend the flowering period.
It's ready when harvest flowers when petals are fully open and stand out horizontally from the center — typically in the morning after dew has dried. Avoid blooms where petals have begun to curl back. Grip the stem just below the flower head and snap or cut cleanly with scissors. Harvest every 2–3 days to prevent seed set. For drying, cut with 2–3 inches of stem attached.
Use fresh petals the same day. For dried petals, spread single-layer on a mesh rack in a warm, dark, well-ventilated spot for 1–2 weeks; store in an airtight jar away from light.
Sow a new batch every 3–4 weeks from early spring through midsummer to maintain continuous bloom; pause sowing during peak summer heat and resume in late summer for a fall flush.
Tomato
Open calendula flowers offer easy nectar and pollen to hoverflies, lacewings, and tiny parasitic wasps, and those insects often reduce aphid numbers on nearby tomatoes. Keep some blooms open rather than deadheading every flower if you want that draw.
Basil
Aphids often settle on calendula's sticky buds in preference to nearby basil tips, which can spare the leaves you actually pick. It only helps if you cut and bag the loaded flower heads instead of letting the colony build.
Carrot
Calendula's fibrous roots stay in the upper soil while carrots drive a single taproot straight down, so the two can share a row edge without fighting over water. Keep the flowers to the bed's border so digging carrots does not uproot them.
Asparagus
Gardeners have long tucked calendula along asparagus rows, though no mechanism has been demonstrated. It is a low-risk pairing: the flowers finish before the ferns close in, and shallow roots do not disturb the crowns.
Cucumber
Cucumbers need insects to move pollen from male to female flowers, and a nearby patch of nectar-rich calendula reliably draws bees into the bed. More bee traffic means fewer stunted, crooked fruit from incomplete pollination.
Easy-going — Calendula can grow almost anywhere in the rotation without a strict rest.
The pea and bean family, the cabbage family or the tomato family thrive in this ground next season.
Calendula is a light feeder that takes little from the soil and leaves fine roots and soft top growth to break down quickly. Leave one season before calendula or other daisy-family plants return here. Legumes, cabbage-family crops, or tomato-family crops all follow well.
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