Calendula

Calendula (Calendula officinalis), the bright-orange winter flower called zergul in Pakistani nurseries, is a Western Mediterranean annual that has travelled the world as both a winter bedding plant and a documented medicinal flower.¹ On the Punjab plains, the Pothohar plateau and the cooler KPK hill gardens it is one of the most reliable rabi-season ornamentals, sown in autumn and flowering through the cool months when little else holds colour.

Where it thrives

Calendula is at home in any well-drained soil in full sun, sown just before the last frost or started indoors 6 to 8 weeks earlier; seeds want 5 to 15 days to germinate at a ¼ to ½ inch depth and benefit from being covered, since light inhibits germination.² The plant thrives in cool weather and struggles in prolonged summer heat, which is the central reason it is run as a winter and early-spring crop in Pakistan rather than a summer one.² NC State puts the plant in full sun with well-drained soil and notes legginess in heavy shade,³ so site the bed on an open south-facing edge of a guild and treat any flagging in May heat as the cue to pull the spent plants for compost.

Role in the system

Calendula is a fast pioneer annual in the groundcover stratum: it germinates quickly in cool soil, holds the surface through the winter window, and is ready to compost back into the bed before heavier summer crops need the room. The flowers carry continuously almost until first heavy frost and pull pollinators into the cool-season garden when most nectar sources are quiet.² Because the plant is deer and rabbit resistant and non-toxic to dogs and cats, it sits cleanly along path edges and around vegetable beds shared with household animals.³

Growing it

Direct-sow seed in autumn on the Punjab plains and in early spring in the hills, just before the last frost.² Thin or transplant seedlings to roughly 30 to 40 cm apart, pinch the growing tips once plants are several inches tall to push bushier growth, and deadhead regularly to extend flowering.² Do not feed heavily: plants flower best when not pushed with nitrogen, and moderate watering beats heavy.² Watch for aphids and powdery mildew under crowded humid conditions but expect few real disease problems otherwise.²

What you get

The marketable and household product is the flower. Petals are edible with a slightly bitter, tangy peppery flavour and add colour to salads, soups, custards, rice and breads, and the flowers also produce a yellow dye.³ The dried flower is the basis of an established medicinal record: a 2023 review in Pharmaceuticals documents anti-inflammatory, antimicrobial, wound-healing, hepatoprotective and antioxidant activity for calendula extracts, with the strongest clinical evidence around topical wound care.⁴

Sourcing notes

Pick up packets from any reputable Pakistani winter-flower seed supplier; calendula seed is widely traded for the rabi nursery season. Site it as a low border around brassicas, peas and onions where its long flowering pulls hoverflies and bees into the bed. Keep a few late flowers on the plant to seed-save and feed the next autumn sowing.

Sources

1. Royal Botanic Gardens, Kew (2024). “Calendula officinalis L.” Plants of the World Online.
2. Mahr, S., University of Wisconsin-Madison (2024). “Calendula, Calendula officinalis.” Wisconsin Horticulture, Division of Extension.
3. NC State Extension (2024). “Calendula officinalis (Pot Marigold).” North Carolina Extension Gardener Plant Toolbox.
4. Shahane, K. et al. (2023). “An Updated Review on the Multifaceted Therapeutic Potential of Calendula officinalis L.” Pharmaceuticals (Basel).