“Marigold Calcutti” typically refers to a variety of marigold, possibly an Indian or regional cultivar. While specific information on this variety might be limited, you can grow marigolds, including Calcutti types, following general marigold growing guidelines:

1. Climate and Soil: Marigolds, in general, thrive in full sun and well-draining soil. They’re adaptable to various soil types but prefer soil that’s not overly rich or heavy.
2. Planting Time: Sow Calcutti marigold seeds directly into the garden after the last frost date in your area. Start seeds indoors 6-8 weeks before the last frost for an earlier start and transplant seedlings outdoors once they’re established.
3. Seed Starting: Plant marigold seeds in well-prepared soil, barely covering them with a thin layer of soil. Space the seeds according to the mature size of the plant, typically around 8-10 inches apart.
4. Sunlight: Ensure Calcutti marigold plants receive full sunlight for most of the day (at least 6 hours of direct sunlight).
5. Watering: Water marigolds regularly, especially during dry periods. Avoid overwatering to prevent issues like root rot. Allow the soil to dry slightly between waterings.
6. Fertilization: Marigolds usually don’t require heavy feeding. Incorporating organic matter like compost into the soil before planting can provide necessary nutrients.
7. Maintenance: Deadhead spent flowers regularly to encourage continuous blooming. Pinching back the stems occasionally can promote a bushier growth habit.
8. Height: Calcutti marigolds may vary in height, but they typically grow to a height of about 6 to 12 inches (15 to 30 centimeters).
9. Pest and Disease Control: Marigolds are relatively resistant to pests and diseases. However, monitor for issues like aphids or powdery mildew and treat as needed with appropriate organic or chemical controls.

For more precise information about growing Marigold Calcutti specifically, consider checking with local horticulturalists, seed suppliers, or gardeners in your area who might have experience with this particular variety.