Calendula (Calendula officinalis) is an easy, cool-season flower to grow from seed. Direct-sow it about two to four weeks before your average last spring frost, cover the seed 1/4 inch deep, and keep the soil evenly moist until germination. With sun, drainage, and regular deadheading, calendula provides orange and yellow flowers for beds, borders, pots, bouquets, edible-petal use, and seed saving.
Calendula (Calendula officinalis) is one of the easiest flowers to grow from seed. Sow it directly in the garden about two to four weeks before your average last spring frost, cover the seed about 1/4 inch deep, keep the soil evenly moist, and expect germination in roughly 7–14 days. Give plants full sun or light shade, well-drained soil, and regular deadheading for a longer display of orange and yellow flowers.
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Calendula is also called pot marigold, but it is not the same plant as the French, African, and signet marigolds in the genus Tagetes. When buying seed, search for “calendula seeds” or Calendula officinalis seeds rather than generic “marigold seeds.”
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| Feature | What to provide |
|---|---|
| Botanical name | Calendula officinalis |
| Family | Asteraceae |
| Light | Full sun is best; light or partial shade is tolerated |
| Soil | Moderately fertile, freely draining soil |
| Seed depth | About 1/4 inch |
| Germination | Approximately 7–14 days under suitable conditions |
| Typical spacing | About 8–12 inches for many garden plantings |
| Best seasons | Spring and fall in many regions; timing depends on heat and frost |
| Uses | Beds, borders, containers, cut flowers, edible petals, drying, and seed saving |
When to plant calendula
Use your local average frost dates rather than a fixed calendar date. Calendula prefers cool conditions and tolerates light frost, so gardeners in cold climates can usually direct-sow it approximately two to four weeks before the average last spring frost. Early spring sowing is also suitable while light frosts are still possible.
For an earlier start, sow indoors about four to eight weeks before the last frost, with four to six weeks being a practical starting point for many seed-starting setups. Transplant the seedlings after hardening them off gradually.
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- Cut-Flower Favorite: Calendula heirloom seeds grow 18-24 in tall with golden yellow and orange blooms in about 50 days - bright cut flower seeds for vases, flower garden beds, and borders.
- Edible and Useful: Pot marigold seeds produce edible petals for dishes and can be used for a medical salve; frost-tolerant color for USDA zones 3-10, a standout among edible flower seeds.
- Container Friendly: Each calendula seed is easy to start - sow 1/4 in deep and transplant; thrives in full sun, rich well-drained soil and performs beautifully in flower seeds for pots.
- Fast Sprouts: Start your calendula plant with 7-20 day germination; space 12-18 in apart, water during dry periods, and mulch to hold moisture - easy to grow flower seeds for any garden.
- Cool-Season Color: 150 Mix Calendula flower seeds bring bright annual blooms with peak spring-summer color and flowering from mid-summer into fall; sow early outdoors. Calendula calendula officinalis seeds are great flower seeds to plant outside.
In mild-winter climates, sow in early spring for summer flowers and again in late summer for cool-season or winter bloom. In regions with very hot summers, calendula may flower less or stop temporarily during extreme heat, then resume when temperatures moderate. This makes early spring and fall especially valuable growing windows.
How to grow calendula from seed
Direct-sowing outdoors
- Choose the site. Select full sun or light partial shade with soil that drains reliably.
- Prepare the seedbed. Remove large stones and weeds, loosen the surface, and create a reasonably fine planting area. Moisten the soil before sowing.
- Sow the seeds. Place calendula seeds about 1/4 inch deep and cover them with soil. Do not leave them exposed; covering the seeds supports germination.
- Maintain moisture. Keep the surface consistently damp while the seeds germinate and seedlings establish, but do not saturate the soil.
- Thin the seedlings. Once seedlings are established, remove extras so the remaining plants have room for airflow and branching. A spacing of about 8–12 inches suits many garden plantings, although the packet’s instructions and the mature size of the cultivar should take priority.
Under suitable conditions, seedlings commonly appear in about 7–14 days. Cooler or warmer-than-ideal temperatures, uneven moisture, old seed, and differences between cultivars can change that timing. If germination is patchy, check whether the seed was planted too deeply or whether the surface dried out after sowing.
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1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minuteFor a continuous supply of flowers, make additional sowings every two to three weeks during the appropriate cool-season planting window. Succession sowing is often more dependable than expecting one planting to flower continuously through hot weather.
Starting calendula indoors
Indoor sowing is optional. Calendula usually germinates readily and tolerates cool conditions, so direct sowing is often the simplest approach. Starting indoors can help you get earlier plants or work around a short spring season.
- Use a clean container with drainage holes and a lightweight seed-starting mix.
- Sow the seeds about 1/4 inch deep and keep the mix evenly moist rather than waterlogged.
- After germination, provide bright light so the seedlings do not become weak and stretched.
- When outdoor conditions are suitable, harden the seedlings gradually by increasing their exposure to outdoor light, wind, and temperature changes over several days.
- Transplant carefully and maintain the same spacing you would use for direct-sown plants.
Indoor supplies are useful for this method, but trays, lights, and specialized equipment are not necessary if you can sow directly into a prepared garden bed at the right time.
Where to plant calendula
Light
Full sun generally produces the strongest flowering. Calendula can tolerate light or partial shade, especially where summers are hot, but plants in deep shade tend to produce fewer flowers and weaker growth. In a hot climate, morning sun with some afternoon protection can help extend the season.
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Soil and fertility
Calendula is adaptable and can grow in ordinary or relatively poor soil, provided excess water drains away. Moderately fertile soil is enough. Heavy, wet soil can cause poor performance, while excessively rich soil may produce lush foliage at the expense of a better-balanced flower display.
Do not assume that frequent feeding is required. If you are unsure whether the soil needs fertilizer, use a soil test and follow its recommendations. Improving drainage is usually more valuable than adding repeated applications of fertilizer.
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- The Best Value - Organo Republic Calendula (scientific name Calendula officinalis) Seeds Pack includes 1 oz or approximately 3,250 Non-GMO heirloom seeds. These stunning, easy-to-grow flowers offer long-lasting color from early summer until the first frost, making them a favorite for both fresh-cut bouquets and professional garden displays. Enhances your landscape with brilliant, sun-kissed orange and yellow blooms that provide a bold, cheerful look to garden beds or patio containers.
- Innovative Seeds Package - Organo Republic flower seeds come in a waterproof resealable seed bag protects calendula seeds from sunlight and moisture, allowing secure storage for successful planting now or later, ensuring freshness and high germination rates. The package features QR codes to online growing guide, making it easy for gardeners of all levels to grow Calendula flowers. We prioritize sustainability to ensure environmental safety.
- High Germination Rate - Grow beautiful calendula flowers effortlessly, whether in indoor trays or your backyard garden. Our premium seeds boast a superior germination rate, rigorously tested to ensure successful growth year-round. Perfect for creating vibrant blooms in your own garden, these top-quality seeds are also a thoughtful gift for gardening enthusiasts.
- Easy to grow - Perfect for beginners and experienced gardeners, our calendula seed package includes detailed tips for success in any climate or soil type. Simply scan the QR codes on the seed packet to access an online growing guide and learn how to plant and care for calendula like a professional gardener.
- US Sourced Premium Calendula Seeds - We are sourcing our seeds only from the most trusted and sustainable domestic seed suppliers and farmers. We proudly test and package them in our Florida Family-Owned Facility to provide you with the best quality. Our seeds for planting flowers undergo rigorous testing with a 90%+ germination rate. Sealed to last for up to 2 years, you can trust the freshness and viability of our flower seeds.
Spacing and airflow
Space plants far enough apart for air to move around their leaves. About 8–12 inches is a useful range for many plantings, but compact and larger cultivars may call for different spacing. Crowding may give a fuller appearance at first, yet it also makes foliage stay damp longer and can increase mildew problems.
Watering calendula
Water regularly while seeds germinate and seedlings develop. Once established, calendula can tolerate some dry conditions, but consistent moisture usually supports better flowering. Check the soil and current weather instead of following a rigid daily schedule.
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- Water when the soil is beginning to dry rather than waiting for plants to wilt repeatedly.
- Water the soil at the base of the plants when possible.
- Avoid standing water and constantly saturated soil.
- Monitor containers more often because their potting mix dries faster than garden soil.
Watering the foliage repeatedly, particularly late in the day, can leave leaves damp and increase the risk of mildew where airflow is poor.
Pinching and deadheading
When young plants have several sets of true leaves, clip or pinch out the growing tip if you want a bushier, more branched plant. This encourages side shoots, although it is not essential for growing healthy calendula.
Remove faded flower heads regularly if your priority is a long flowering period and a tidy planting. Deadheading directs the plant away from seed production and toward additional flowers. Leave some flower heads in place if you want to save seed or encourage self-sowing.
A practical compromise is to deadhead most plants while reserving a few vigorous, healthy specimens for seed. That gives you continued flowers without allowing the entire planting to become untidy or heavily self-sown.
Growing calendula in containers
Calendula grows well in patio pots, window boxes, and other containers. Choose a pot with drainage holes and use a well-drained potting medium. Do not allow the container to sit in a saucer of standing water.
- Place the container in full sun or light shade.
- Use the seed packet’s mature size and spacing guidance when combining plants.
- Avoid overfilling the pot; crowding reduces airflow and increases competition for water.
- Check moisture frequently, especially in warm, windy weather.
- Deadhead regularly to keep the display flowering and attractive.
A pot with drainage holes is a useful choice for gardeners without a suitable bed, but calendula does not require an unusually elaborate container setup.
Common calendula pests and diseases
Aphids and whiteflies
Aphids and whiteflies may gather on tender growth or the undersides of leaves. Begin by checking plants regularly so a small population does not become a larger problem.
- Use a strong stream of water to dislodge soft-bodied insects, taking care not to damage the stems.
- Improve plant spacing and remove badly infested growth where appropriate.
- If a treatment is necessary, use an insecticidal soap only when the product label permits the intended use. Follow the label’s dilution, application, and safety instructions.
Broad or careless spraying can harm beneficial insects as well as pests. Avoid treating open flowers when pollinators are actively visiting, unless the product label specifically provides safe directions for that situation.
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- Unique Bloom Color: Pink Surprise calendula heirloom seeds grow 16-inch mounding plants with double peach-pink blooms. These calendula flowers seeds brighten borders and containers from spring through fall.
- Easy to Grow: Calendula officinalis seeds germinate in 7-14 days and thrive in full sun with average water across Hardiness Zones 3-10. Ideal calendula seeds for planting in outdoor garden beds, borders, and pots.
- Pollinator Friendly: Pot marigold seeds attract bees, butterflies, and other pollinators while offering fragrant edible flowers. Great flower seeds for planting in a lively home garden.
- Compact Garden Fit: Calendula seed forms clumping plants spaced 8-10 inches apart, making these heirloom flower plants a strong choice for container garden displays and cut flower garden layouts.
- Tough Yet Pretty: Pink surprise calendula plant is drought tolerant once established and resists deer and rabbits. These calendula flower seeds deliver long bloom color with easy-care performance.
Calendula can sometimes be used as a trap crop for aphids in a mixed garden. That is a management strategy, not a guarantee that calendula will repel aphids or protect every nearby plant.
Powdery mildew
Powdery mildew is more likely where air circulation is poor and conditions remain damp. Reduce the risk by spacing plants appropriately, watering the soil instead of repeatedly wetting the leaves, and avoiding unnecessary overhead irrigation. Remove badly affected material where appropriate and dispose of it rather than leaving diseased foliage around the planting.
Why is my calendula not flowering?
The most common explanations are unsuitable temperature, insufficient light, excessive nitrogen or fertility, crowding, and missed deadheading.
- Too much heat: Calendula is a cool-season flower and may pause during extreme summer temperatures. It may bloom again in cooler weather.
- Too little light: Deep shade encourages weaker growth and fewer flowers. Move container plants or thin nearby growth if possible.
- Too much fertilizer: Excess fertility can produce foliage without a proportional increase in flowers.
- Overcrowding: Thin seedlings and improve airflow.
- Developing seed: If many faded heads remain, the plant may be directing energy into seed production. Deadhead most of them if more flowers are the priority.
- Water stress: Very dry soil can reduce growth and flowering, while saturated soil damages roots. Aim for consistent, well-drained moisture.
How to harvest calendula flowers
For culinary use, harvest fully open flowers after the dew has evaporated. Remove the petals from the flower heads before using them. Calendula petals add color and a mildly peppery or saffron-like character, but they are used primarily for color and are not a true replacement for saffron’s flavor.
For arrangements, cut flowers at an earlier opening stage to improve vase life. Use clean, sharp scissors or pruners and place the stems in water promptly.
Only eat flowers that were grown and handled for edible use. Do not consume flowers treated with pesticides that are not labeled for edible crops, or flowers collected from roadsides and other potentially contaminated locations. Calendula’s traditional uses should not be presented as proof that it treats a medical condition.
How to dry and store calendula
- Harvest clean flowers after surface moisture has evaporated.
- Spread them in a well-ventilated place away from direct sunlight, or use a food dryer according to its instructions.
- Allow the flowers to dry completely. Depending on humidity, airflow, and the equipment used, this may take roughly one to five days.
- Store fully dried petals or flowers in a moisture-tight container in a cool, dark place.
Dried calendula can be used for decorative projects, teas, and culinary color. A food dehydrator for herbs and flowers is optional; air-drying in a well-ventilated location can work when conditions are suitable. Do not treat dried calendula as interchangeable with a regulated medicine.
Seed saving and self-sowing
Calendula often self-seeds. If you want it to return in the same area, leave selected flower heads on the plant until they mature and dry, then allow some seed to fall or collect it for later sowing.
To save seed, wait until the seed head is dry and the seeds are mature. Collect the heads, separate the seed, and store it in a dry place. Label the seed with the cultivar and year so you know what you saved.
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- Beautiful - Full color seed packets of Ball’s Orange Calendula (Calendula officinalis) flowers. This variety produces beautiful round deep orange colored blossoms. Enjoy outside in the garden and indoors as cut flowers. Minimum of 750mg per packet (about 80 seeds).
- Productive - Calendula germinates in 7-14 days when soil temps are above 65°F. Plant 1/4” deep and space 10-15” apart in an area with full sun. This variety will grow 1-2’ tall with a spread of 6-8”. Flowers will mature in 50-60 days. Plant in USDA zones 2-11.
- Pollinator Friendly - Butterflies and bees love Ball’s Orange Calendula flowers and will likely pay you many visits. Great way to support your local pollinators. Plant wildflower style or in carefully arranged beds, whatever suits your fancy. Can produce an amazing 100 blossoms per plant.
- Easy to Grow - Instructions included on each packet. Plus, we are available to answer all your questions. If these seeds don’t germinate, we will happily make it right for you.
- Safe and Sustainable - Our operation is fully solar powered, and Sow Right Seeds has taken the Safe Seed Pledge to sell only fresh Non-GMO heirloom seeds for you and your family.
If you do not want an expanding or untidy patch, deadhead before the seed fully matures. You can also remove unwanted seedlings early, while they are easy to distinguish and pull.
Seed viability can decline during storage, depending on age and storage conditions. Buying fresh seed periodically is a sensible practical choice, but it is not an absolute requirement for every properly stored batch.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Choosing a calendula cultivar
No single calendula cultivar is best for every garden. Choose from the packet’s stated flower color, mature height, bloom period, heat performance, and intended use.
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|---|---|
| Pacific Beauty | A mixed-color blend with orange and yellow flowers; suitable for ornamental displays, cutting, and edible petals when grown appropriately. |
| Coronet | Identified by Utah State University Extension as having increased heat tolerance, which may be useful in warmer gardens. |
| Touch of Red | Known for darker or red-edged petals. |
| Kabouana | Associated with dark centers. |
| Resina and Erfurter Orangefarbige | Identified for higher resin content in the flowers. |
Availability and names vary among sellers and regions. Check the current packet description rather than assuming every named variety is available everywhere or performs identically in every climate.
Is calendula the same as a marigold?
No. Calendula is Calendula officinalis, commonly called pot marigold. The ornamental marigolds commonly sold as French, African, and signet marigolds belong to the genus Tagetes. They are different plants with different growing characteristics and uses. Use the botanical name when buying seed to avoid purchasing the wrong kind of marigold.
Does calendula come back every year?
Calendula may behave as an annual or biennial depending on the climate and growing conditions. It can also return through self-sown seedlings. In a cold climate, plants may not survive winter, but seed dropped in fall can germinate in a later suitable season. In mild climates, plants may persist or reseed more readily. Deadhead if you want control; leave selected seed heads if you want natural renewal.
A simple calendula care routine
- Sow at a season guided by local frost dates and summer temperatures.
- Cover seed about 1/4 inch deep and keep the seedbed evenly moist.
- Thin seedlings to provide airflow and room to branch.
- Water established plants when the soil begins to dry, taking extra care with containers.
- Deadhead most plants for continued flowering.
- Reserve a few flower heads for seed saving if desired.
- Inspect regularly for aphids, whiteflies, and mildew.
- Harvest edible petals only from plants grown and treated for edible use.
With those basics in place, calendula is a low-input flower that can fill beds, containers, and cutting gardens with color while giving you the choice of a tidy display, a self-sown patch, or a supply of petals and seed.
Frequently Asked Questions
Is calendula the same as a marigold?
No. Calendula is Calendula officinalis, while French, African, and signet marigolds are Tagetes species. Use the botanical name when purchasing seed.
Best Value
- GORGEOUS - Who doesn't love a bright, happy flower bed of calendula flowers? Also makes great cut flowers.
- ANNUAL - The beautiful calendula flower plants are annuals and will need to be grown each year in your flower garden.
- ATTRACT POLLINATORS - Bring pollinators into your fruit, vegetable and flower garden with these calendula seeds.
- MEDICINAL - Calendula is often used in Chinese medicine for medicinal purposes.
- PACKETS - Each calendula seeds packet is printed on water resistant paper, in full color with growing and harvesting directions included. Each heirloom flowers seeds packet contains at least 1 gram of seeds, more than competitors.
Can calendula grow in pots?
Yes. Use a container with drainage holes, a well-drained potting medium, and full sun or light shade. Check moisture more often than you would in a garden bed and avoid crowding the pot.
Does calendula need full sun?
Full sun generally produces the most flowers, but calendula tolerates light or partial shade. Deep shade usually results in weaker growth and fewer blooms.
How deep do you plant calendula seeds?
Plant calendula seeds about 1/4 inch deep and cover them with soil. Keep the surface evenly moist until seedlings emerge, usually within about 7–14 days under suitable conditions.
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Why is my calendula not flowering?
Heat, deep shade, excessive fertility, crowding, water stress, or allowing many faded heads to develop seed can reduce flowering. Calendula may also pause during extreme summer heat and resume in cooler weather.
Should I deadhead calendula?
Yes, if you want more flowers and a tidier plant. Deadhead most faded blooms regularly, but leave selected flower heads if you want to save seed or encourage self-sowing.
Can you eat calendula flowers?
Yes, the petals can be eaten when the flowers were grown and handled for edible use. Harvest fully open flowers after dew dries, remove the petals, and do not eat flowers exposed to unsuitable pesticides or roadside contamination.
How do you dry calendula flowers?
Dry clean flowers in a well-ventilated place away from direct sunlight or use a food dryer. Drying may take roughly one to five days depending on conditions. Store completely dry flowers in a moisture-tight container in a cool, dark place.
Does calendula come back every year?
Calendula may act as an annual or biennial depending on climate. It can also return from self-sown seed, especially in mild conditions. Leave selected seed heads if you want it to reseed, or deadhead before seed matures to keep it contained.
What is the best calendula seed to buy?
Choose based on the packet’s stated color, height, bloom period, heat performance, and intended use. Pacific Beauty is a mixed-color option, Coronet is noted for increased heat tolerance, and Touch of Red and Kabouana offer distinctive flower coloring. Availability varies by seller.
The Bottom Line
For the most reliable results, grow calendula in sun and well-drained soil, direct-sow covered seed around two to four weeks before the average last spring frost, and keep it evenly moist while it establishes. Deadhead for more flowers, leave selected heads to save seed, and expect flowering to slow during extreme heat.
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
