How To Plant Calendula Seeds [ Full Guide ]

Calendula, also known as Pot Marigold, is a popular and versatile flowering plant that is not only aesthetically pleasing but also boasts medicinal properties. Known for its bright and vibrant blooms, calendula can be easily grown from seeds, making it a great choice for both novice and experienced gardeners. In this comprehensive guide, you will learn everything you need to know about planting calendula seeds, including the ideal growing conditions, soil preparation, planting techniques, and tips for a successful harvest.

Quick Answer: How To Plant Calendula Seeds

Planting calendula seeds is a relatively straightforward process, making it an ideal choice for gardeners of all skill levels. To plant calendula seeds, follow these quick steps:

  1. Choose a suitable growing location that receives full sun or partial shade.
  2. Prepare the soil by ensuring it is well-draining and fertile, and remove any debris or weeds.
  3. Plant the seeds directly into the soil, approximately 1/4 inch deep and 12 inches apart.
  4. Water the seeds regularly to keep the soil moist but not waterlogged.
  5. Keep an eye on the seedlings and provide proper care as they grow.

By following these steps and providing the right conditions, you can enjoy the beauty of calendula blooms in your garden.

Choosing The Right Growing Location

Selecting the right location for planting calendula seeds is crucial for the successful growth and blooming of the plant. Calendula thrives in areas with plenty of sunlight, ideally receiving full sun for at least 6-8 hours a day. However, it can also tolerate partial shade, especially in regions where intense heat can scorch the plants.

When choosing a growing location, consider the following factors:


Calendula plants prefer well-lit areas, so choose a spot in your garden that receives ample sunlight. If you live in a particularly hot climate, providing some afternoon shade can help protect the plants from excessive heat.

Soil Drainage

Ensure that the chosen area has well-draining soil to prevent waterlogging, which can lead to root rot and other issues. Calendula thrives in fertile, loamy soil with good drainage.

Air Circulation

Good air circulation helps prevent diseases and promotes healthy plant growth. Avoid planting calendula in crowded or overly sheltered locations where air movement may be restricted.

By taking these factors into account, you can create an ideal growing environment for your calendula plants, setting the stage for healthy growth and abundant blooms.

Preparing The Soil For Planting

Proper soil preparation is essential for the successful germination and growth of calendula seeds. Calendula thrives in well-drained, fertile soil with a slightly acidic to neutral pH (6.0-7.0). Here’s how to prepare the soil for planting:

Clear The Area

Start by clearing the selected area of any debris, weeds, or rocks. Use a rake or garden tool to remove any obstacles that may hinder the growth of the calendula plants.

Soil Testing

Perform a soil test to determine the pH level and nutrient composition of the soil. While calendula is relatively tolerant of various soil conditions, a slightly acidic to neutral pH is ideal for optimal growth. If necessary, amend the soil with organic matter or pH-adjusting products to achieve the desired pH level.

Improve Soil Structure

Incorporate organic matter such as compost or well-rotted manure into the soil to improve its structure and fertility. This will provide essential nutrients and improve the soil’s ability to retain moisture without becoming waterlogged.

Loosen The Soil

Use a garden fork or tiller to loosen the soil to a depth of about 6-8 inches. This helps create an aerated and friable environment for the calendula seeds to establish strong root systems.

By carefully preparing the soil, you can create an optimal growing medium that promotes the healthy development of calendula plants and ensures successful seed germination.

When To Start Planting Calendula Seeds

Knowing the right time to plant calendula seeds is crucial for maximizing their growth potential and ensuring a bountiful display of vibrant blooms. The timing of planting can vary depending on your climate and local growing conditions. In general, calendula seeds can be planted in the following seasons:

Spring Planting

In most regions, spring is an ideal time to sow calendula seeds. As the days lengthen and temperatures begin to rise, the soil warms up, providing optimal conditions for seed germination and early growth.

Fall Planting

In milder climates with mild winters, fall planting can also be successful for calendula. By planting in the fall, the seeds have the opportunity to germinate and establish roots before the arrival of winter. This can lead to earlier spring blooms and a prolonged flowering period.

Year-Round Planting In Mild Climates

In regions with mild year-round temperatures, such as Mediterranean climates, calendula seeds can be planted virtually year-round. However, it’s important to avoid extreme temperatures, whether too hot or too cold, which can stress the plants.

By considering your local climate and weather patterns, you can determine the best time to plant calendula seeds for optimal growth and blooming.

Selecting And Purchasing Quality Seeds

Choosing high-quality seeds is essential for successful calendula cultivation. When selecting and purchasing calendula seeds, consider the following factors to ensure the best possible results:

Seed Source

Purchase seeds from reputable suppliers and nurseries to ensure their quality and viability. Look for suppliers that specialize in organic or heirloom seeds for a wider selection and assurance of seed purity.

Seed Viability

Check the seed packet for the expiration date and germination rate. Fresh seeds with a high germination rate will have a better chance of sprouting and establishing healthy plants.

Seed Variety

Calendula comes in various colors and sizes, so choose a seed variety that best suits your preferences and garden design. Common varieties include “Pacific Beauty”, “Orange King”, and “Zeolights”.

Organic Seeds

Opting for organic calendula seeds ensures that your plants are free from potentially harmful chemicals and pesticides, providing a more natural and environmentally friendly gardening experience.

By carefully selecting high-quality seeds, you can set the stage for successful calendula cultivation and enjoy a stunning display of colorful blooms in your garden.

Planting calendula seeds is a rewarding and enjoyable experience that allows you to create a vibrant and visually appealing garden display. By choosing the right growing location, preparing the soil properly, and timing your planting, you can set the stage for healthy calendula plants with prolific blooming. Whether you’re a novice gardener or seasoned horticulturist, this versatile plant can bring joy and beauty to any garden. With the comprehensive information provided in this guide, you can confidently embark on your calendula planting journey and look forward to the abundant and cheerful blooms that await you.

Understanding Seed Germination

Calendula, also known as marigold, is a beautiful flowering plant that blooms with vibrant yellow and orange flowers. It is a popular choice among gardeners due to its attractive appearance and its ability to attract bees and butterflies. If you want to add a splash of color to your garden, planting calendula seeds is a great option.

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Before diving into the planting process, it is essential to understand the basics of seed germination. Calendula seeds can take anywhere from 7 to 14 days to germinate, depending on the conditions. The germination process requires moisture, oxygen, and the right temperature range.

When it comes to calendula seeds, some gardeners prefer to start the seeds indoors while others sow directly into the garden. Both methods can be successful, but starting the seeds indoors gives you a head start and allows you to control the early stages of growth more efficiently.

Proper Planting Techniques

1. Choosing the Right Time

Calendula is a cool-season plant, which means it thrives in cooler temperatures. It is best to plant calendula seeds in early spring or late fall when the weather is mild. This will encourage optimal growth and blooming. If you live in a region with particularly hot summers, you may need to provide some shade during the hottest part of the day.

2. Preparation of the Soil

Calendula plants prefer well-draining soil. Before sowing the seeds, prepare the soil by clearing away any weeds or debris. Loosen the soil with a garden fork or tiller, and amend it with organic matter such as compost or well-rotted manure. This will help improve the soil’s fertility, drainage, and moisture retention.

3. Sowing the Seeds

Indoor Sowing:

If you choose to start the calendula seeds indoors, begin the process about 6 to 8 weeks before the last frost date in your region. Fill seed trays or small pots with a seed-starting mix, which provides excellent drainage. Moisten the soil before sowing the seeds. Scatter the seeds evenly on the surface of the soil, allowing a few inches of space between each seed.

Cover the seeds with a thin layer of soil, around ¼ inch deep, and gently press it down to ensure good seed-to-soil contact. Remember that calendula seeds require light to germinate, so avoid burying them too deep.

Place the trays or pots in a warm location with temperatures between 65 to 75°F (18 to 24°C). You can use a heating mat to help maintain a consistent temperature if needed. Moisture is crucial for seed germination, so mist the soil surface regularly to keep it damp but not waterlogged.

Direct Sowing:

Direct sowing in the garden can be done after the danger of frost has passed and the soil has warmed up. Sow the seeds directly into well-prepared soil, following the spacing instructions on the seed packet. Scatter the seeds on the soil surface and cover lightly with a thin layer of soil.

4. Thinning Seedlings

Once the seedlings have grown a few inches tall, it is important to thin them out to ensure healthy plant development. For indoor-sown seedlings, choose the strongest and healthiest ones and carefully transplant them into individual containers, spacing them about 6 to 8 inches apart. The discarded seedlings can be gently pulled out to avoid disturbing the roots of the remaining plants.

For direct-sown seedlings, thin them out by removing the weaker ones so that the remaining plants are spaced about 6 to 8 inches apart. This will allow sufficient airflow, reduce competition for nutrients, and prevent overcrowding.

Watering And Fertilizing Your Calendula Plants

1. Watering

Proper watering is essential for the health and growth of calendula plants. During the germination period, be sure to keep the soil consistently moist. You can use a misting spray bottle or a fine watering can to avoid disturbing the seeds or seedlings.

Once the plants are established, water them deeply and thoroughly, ensuring the soil is evenly moist. Calendula plants prefer moist, but not waterlogged soil. To determine when to water, stick your finger about an inch into the soil. If it feels dry, it is time to water. Avoid overhead watering, as this can increase the risk of fungal diseases.

2. Fertilizing

Calendula plants are relatively low-maintenance and typically do not require heavy fertilization. However, adding some organic matter during soil preparation can provide essential nutrients. If your soil is lacking in nutrients, you can apply a balanced, slow-release fertilizer according to the package instructions.

Avoid using excessive amounts of nitrogen-based fertilizers, as this can result in excessive foliage growth at the expense of flower production. It is generally recommended to fertilize calendula plants every six to eight weeks during the growing season.

Maintaining Optimal Growing Conditions

1. Sunlight

Calendula plants thrive in full sun to partial shade. They require at least 6 hours of direct sunlight daily to produce an abundance of flowers. If you live in an extremely hot climate, providing some afternoon shade can help protect the plants from scorching.

2. Temperature

As previously mentioned, calendula is a cool-season plant. It performs best when temperatures range between 55 to 70°F (13 to 21°C). If the temperature rises above 75°F (24°C), the plants may become stressed and stop blooming. To extend the blooming period, consider planting calendula in a location that receives shade during the hottest part of the day.

3. Mulching

Applying a layer of organic mulch around calendula plants can provide numerous benefits. Mulch helps to regulate soil temperature, retain moisture, suppress weed growth, and prevent soil erosion. Choose organic mulching materials such as straw, woodchips, or shredded leaves and spread a layer around 2 to 3 inches thick.

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4. Pest and Disease Management

Calendula plants are generally resistant to pests and diseases. However, they can occasionally be affected by aphids or powdery mildew. To control aphids, you can hose off the affected plants with a strong jet of water or use insecticidal soap if necessary. In case of powdery mildew, ensure good air circulation by spacing the plants adequately, and remove and destroy any infected leaves.

5. Deadheading and Pruning

Deadheading involves removing faded or spent flowers. This not only improves the appearance of the plants but also promotes continuous blooming. Snip off the flowers just above the first set of healthy leaves to encourage new buds to form.

Pruning can be done to shape the plant or to remove any dead or diseased growth. Use clean and sharp pruning shears to make clean cuts, and always prune above a healthy leaf node or bud.

Planting calendula seeds is a rewarding and relatively simple process that can bring an array of vibrant colors to your garden. By understanding the seed germination process, utilizing proper planting techniques, providing adequate water and nutrients, and maintaining optimal growing conditions, you can enjoy the beauty of calendula flowers in your garden. Remember to pay attention to watering, fertilizing, and pest management to ensure healthy growth and abundant blooming. With a little care and attention, your calendula plants will flourish and bring joy to both you and the pollinators visiting your garden.

Planting Calendula Seeds

Calendula, also known as pot marigold, is a beautiful and versatile plant that produces vibrant flowers and has numerous culinary and medicinal uses. Planting calendula seeds is a straightforward process that can be done by gardeners of all skill levels.

Before planting calendula seeds, it’s important to select the appropriate location and prepare the soil. Calendula thrives in full sun but can tolerate partial shade as well. Choose a spot in your garden that receives at least six hours of sunlight each day. The soil should be well-draining and fertile, with a pH level between 6.0 and 7.0.

Here are the steps to plant calendula seeds:

  1. Preparing the Soil: Begin by removing any weeds or debris from the planting area. Loosen the soil to a depth of at least six inches using a garden fork or tiller. This will help improve drainage and aeration.

  2. Amending the Soil: Calendula prefers rich soil, so adding organic matter such as compost or well-rotted manure is beneficial. Spread a layer of compost over the planting area and mix it into the soil using a garden rake.

  3. Sowing the Seeds: Calendula seeds are relatively large and easy to handle. To sow the seeds, create shallow furrows in the soil, about 1/4 inch deep. Space the furrows 6-12 inches apart to allow the plants enough room to grow. Place the seeds in the furrows, spacing them about 2 inches apart, and cover them with a thin layer of soil. Gently tamp down the soil to ensure good seed-to-soil contact.

  4. Watering: After sowing the seeds, water the area thoroughly but gently to avoid disturbing the seeds. Keep the soil moist but not waterlogged during the germination period, which usually takes around 7-10 days. Once the seedlings appear, reduce the frequency of watering, allowing the soil to dry out slightly between waterings.

  5. Thin the Seedlings: When the seedlings have reached about 2-3 inches in height, thin them out to prevent overcrowding. Remove the weakest seedlings, leaving the strongest and healthiest ones spaced about 6-12 inches apart. Thinning the seedlings allows for better airflow and prevents the spread of diseases.

  6. Mulching: Applying a layer of organic mulch, such as straw or wood chips, around the base of the plants helps retain soil moisture, suppresses weed growth, and regulates soil temperature. Mulching also adds nutrients to the soil as it breaks down over time.

  7. Fertilizing: Calendula plants are not heavy feeders but can benefit from a light application of balanced fertilizer. Apply a slow-release fertilizer according to the manufacturer’s instructions once the seedlings have become established.

Dealing With Common Pests And Diseases

Although calendula is generally resistant to pests and diseases, there are a few common issues that you may encounter during the growing season. By being vigilant and taking preventative measures, you can keep your calendula plants healthy and pest-free. Here are some common pests and diseases that affect calendula and how to deal with them:

  1. Aphids: Aphids are small, soft-bodied insects that feed on the sap of plants. They can cause stunted growth and yellowing of the leaves. To control aphids, try spraying the affected plants with a strong stream of water to dislodge them. Alternatively, you can use insecticidal soap or neem oil, following the manufacturer’s instructions.

  2. Slugs and Snails: Slugs and snails are nocturnal pests that can chew through the leaves and flowers of calendula plants. To deter them, create physical barriers using copper tape around the base of the plants. You can also handpick them in the evening and dispose of them in a bucket of soapy water.

  3. Powdery Mildew: Powdery mildew is a fungal disease that appears as a white, powdery coating on the leaves and stems of plants. To prevent powdery mildew, ensure proper air circulation around the plants by pruning them and spacing them adequately. If powdery mildew does occur, you can apply a fungicide specifically formulated for powdery mildew, following the instructions on the label.

  4. Gray Mold: Gray mold, also known as botrytis blight, is a common fungal disease that affects calendula plants. It causes grayish-brown spots on the leaves and flowers, eventually leading to rot. To prevent gray mold, avoid overhead watering and provide good airflow. If you notice signs of gray mold, remove the infected plant parts and dispose of them in sealed bags to prevent the spread of spores.

  5. Root Rot: Root rot is a fungal disease that affects the roots of plants, leading to yellowing, wilting, and eventual death. To prevent root rot, ensure proper drainage by planting calendula in well-draining soil. Avoid overwatering and make sure the planting area is not prone to waterlogging.

Harvesting And Saving Calendula Seeds

Harvesting calendula seeds is an enjoyable aspect of growing these plants, as it allows you to propagate them for future seasons. Here’s how to harvest and save calendula seeds:

  1. Choosing the Right Time: Calendula seeds are ready for harvesting when the flowers have faded and begun to dry out. Look for mature flowers with dried petals and dark seeds in the center. Avoid harvesting seeds from flowers that are still fresh or have signs of mold or disease.

  2. Removing the Seeds: To harvest the seeds, gently pluck or cut off the flower heads from the plants. Place the flower heads in a paper bag or a shallow bowl to catch any seeds that may fall out during the process. It’s best to harvest the seeds on a dry day to prevent moisture from affecting their viability.

  3. Drying the Seeds: To ensure the longevity of the seeds, they need to be properly dried. Spread the harvested flower heads in a single layer on a clean, dry surface, such as a tray or a screen. Place them in a well-ventilated area out of direct sunlight. Allow the flower heads to dry completely, which usually takes 1-2 weeks. During this time, periodically shake the flower heads or gently rub them to release any remaining seeds.

  4. Storing the Seeds: Once the seeds are thoroughly dry, store them in a sealed container or an airtight bag in a cool, dark place. Label the container with the name and date of the seeds for future reference. Properly stored calendula seeds can remain viable for up to two years.

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Using Calendula Seeds In Culinary And Medicinal Applications

Calendula seeds not only provide a beautiful addition to your garden but can also be used in various culinary and medicinal applications. Here are some ways to utilize calendula seeds:

  1. Culinary Uses: The seeds of calendula have a slightly nutty and peppery flavor, making them a delightful addition to salads, soups, and baked goods. You can sprinkle them over dishes as a garnish or infuse them in oils and vinegars to add flavor to dressings and marinades.

  2. Medicinal Uses: Calendula seeds contain beneficial compounds that have anti-inflammatory, antimicrobial, and antioxidant properties. They can be used to make soothing herbal teas, tinctures, and salves. Calendula seed oil, obtained through a process called cold-pressing, is commonly used in skincare products for its moisturizing and healing properties.

When using calendula seeds in culinary or medicinal applications, it’s important to ensure that the seeds are of high quality and have been properly stored to maintain their potency.

Troubleshooting Common Seed-Related Issues

Sometimes, gardeners may encounter issues related to the seeds themselves, such as poor germination or low seed viability. Here are some troubleshooting tips for common seed-related problems:

  1. Poor Germination: If your calendula seeds fail to germinate or have a low germination rate, it could be due to several factors. Ensure that the seeds are fresh and have been stored properly. Additionally, check the planting depth and temperature requirements for the specific variety of calendula you are growing. Some varieties require cold stratification, which can be achieved by placing the seeds in the refrigerator for a few weeks before planting.

  2. Damping Off: Damping off is a fungal disease that affects seedlings, causing them to wilt, collapse, and eventually die. To prevent damping off, make sure to use sterile seed-starting mix and clean containers. Avoid overwatering and provide good airflow to seedlings by using a fan or opening windows.

  3. Cross-Pollination: Calendula plants are notorious for cross-pollination, which can result in hybridization and unpredictable flower colors. To maintain the purity of a specific variety, ensure that you isolate your calendula plants from other varieties to prevent cross-pollination. Hand-pollinating specific flowers using a small brush can also help maintain the characteristics of a particular variety.


Planting calendula seeds is a rewarding and enjoyable process that allows you to grow these beautiful flowers while reaping their culinary and medicinal benefits. By following the steps outlined in this article, you can plant calendula seeds with confidence, troubleshoot common pests and diseases, harvest and save seeds for future planting, and explore the various uses of calendula seeds in culinary and medicinal applications. With proper care and attention, your calendula plants will thrive and add a vibrant touch to your garden while providing you with a versatile herb for your kitchen and home remedies.


What Is The Best Time To Plant Calendula Seeds?

The best time to plant calendula seeds is in the early spring or late summer. In the early spring, plant the seeds about 2-4 weeks before the last expected frost. In the late summer, plant the seeds 8-10 weeks before the first expected frost.

What Type Of Soil Is Best For Planting Calendula Seeds?

Calendula plants prefer well-draining soil that is fertile and nutrient-rich. They can tolerate a range of pH levels, but a slightly acidic to neutral soil is ideal. Incorporating compost or other organic matter into the soil can also help improve the soil quality.

How Deep Should Calendula Seeds Be Planted?

Calendula seeds should be planted about 1/4 inch deep into the soil. Do not bury the seeds too deeply or they may not germinate.

How Often Should I Water My Calendula Seeds After Planting?

Water your calendula seeds immediately after planting and then keep the soil evenly moist, but not soggy. Watering every 2-3 days is usually sufficient, but adjust the frequency based on the weather conditions and the moisture level of the soil.

How Long Does It Take For Calendula Seeds To Germinate?

Calendula seeds typically germinate within 5-7 days, although it can take up to 14 days in some cases. Keep the soil warm and moist during this time to encourage germination. Once the seedlings have emerged, thin them out to about 6-12 inches apart to give them enough space to grow.