Calendula Edible Flower Seeds

Calendula can be direct sown where it is to flower or started in trays, cells or small pots before transplanting.

Sowing Method

No pre-soaking is normally required.

To raise seedlings:

1. Fill trays, cells or small pots with quality seed-raising mix.
2. Moisten the growing medium before sowing.
3. Place the seeds individually into the mix.
4. Cover with approximately 10–15mm of seed-raising mix.
5. Water gently to settle the growing medium.
6. Keep the mix consistently moist without saturating it.
7. Place in a cool to moderately warm position.
8. Provide plenty of light once seedlings emerge.
9. Thin crowded seedlings where necessary.
10. Transplant once the plants have developed true leaves and are strong enough to handle.

For direct sowing:

1. Prepare a fine, weed-free seedbed.
2. Sow at the recommended depth.
3. Cover gently with soil.
4. Keep the soil consistently moist until seedlings are established.

Sowing Depth

Sow approximately:

10–15mm deep

Calendula seed benefits from being covered rather than surface sown.

Cover with fine soil or seed-raising mix and gently firm the surface to maintain good contact between the seed and growing medium.

Best Sowing Season

Calendula generally performs best during cooler to mild conditions.

As a practical Australian guide:

• Cool climates: spring to early summer
• Temperate climates: autumn and spring
• Subtropical climates: late summer through winter
• Tropical climates: autumn and winter
• Hot or arid climates: autumn through spring, avoiding extreme summer heat

Calendula tolerates cool conditions well, but prolonged extreme heat can reduce flowering quality.

Germination

Expect germination in approximately:

7–14 days

Aim for a germination temperature of approximately:

15–22°C

During germination:

• Keep the growing medium consistently moist.
• Do not allow the seedbed to dry completely.
• Avoid waterlogging.
• Protect young seedlings from slugs and snails.
• Provide strong light once seedlings emerge.

Plant Spacing

Space established plants approximately:

25–30cm apart

This provides enough room for the bushy plants to develop while maintaining reasonable airflow.

Position

Grow Calendula in:

Full sun to light partial shade

For strong flowering, provide plenty of direct sunlight.

Calendula prefers:

• Well-drained soil
• Moderate fertility
• Regular moisture
• Good airflow
• Protection from prolonged extreme heat

In hot climates, some afternoon shade can be beneficial.

Soil & Drainage

Calendula is adaptable but performs best in well-drained soil.

Choose soil that is:

• Loose and workable
• Moderately fertile
• Free draining
• Not permanently waterlogged

Very rich soil is unnecessary and can encourage excessive leafy growth rather than flowers.

Watering

Keep young plants consistently moist during germination and establishment.

Once established:

• Water when the upper soil begins to dry.
• Increase watering during warm or windy weather.
• Check container-grown plants more frequently.
• Avoid allowing pots to stand permanently in water.
• Direct water towards the soil where practical.

Feeding

Calendula generally requires only moderate fertility.

In reasonably fertile garden soil, heavy feeding is unnecessary.

Container-grown plants may benefit from occasional light feeding during active growth.

Avoid excessive high-nitrogen fertiliser, which can encourage leafy growth at the expense of flowering.

Growing Calendula in Pots

Calendula is well suited to container growing.

Use:

• A pot approximately 20–25cm wide or larger
• Quality potting mix
• Good drainage holes
• A sunny position
• Regular access to water

Larger containers can accommodate several plants and may maintain more stable moisture levels.

Encouraging More Flowers

Calendula responds well to regular harvesting and deadheading.

To encourage continued flowering:

1. Harvest edible petals regularly.
2. Remove spent flower heads before mature seed forms.
3. Cut fading stems back to a healthy leaf or branching point.
4. Maintain regular watering during dry periods.
5. Feed lightly only where necessary.

Allowing every flower to mature into seed can gradually reduce new flower production.

Harvesting Edible Calendula Petals

The petals are the part recommended for culinary use.

Harvest flowers when they are:

• Fully open
• Fresh and brightly coloured
• Free from obvious damage
• Dry rather than wet from rain or irrigation

For culinary use:

1. Harvest with clean scissors or gently remove the flower head.
2. Inspect carefully for insects.
3. Separate the colourful petals from the central flower head.
4. Use fresh or prepare the petals for drying.

Calendula petals can be used with:

• Salads
• Cakes and desserts
• Rice dishes
• Soups
• Savoury dishes
• Platters
• Garnishes

Drying Calendula Petals

To dry the petals:

1. Harvest clean, healthy flowers.
2. Remove the petals from the flower head.
3. Spread them loosely in a single layer.
4. Dry in a clean, shaded and well-ventilated location.
5. Allow them to become completely dry before storage.
6. Store in a sealed container away from heat, moisture and direct sunlight.

Do not seal partially dried petals, as retained moisture can cause deterioration.

Food Safety for Edible Flowers

Only consume Calendula flowers that have been correctly identified and grown for edible use.

• Use clean gardening and harvesting equipment.
• Do not consume flowers treated with chemicals that are not approved for edible crops.
• Avoid flowers from roadsides or areas exposed to unknown sprays, contaminated water or animal waste.
• Inspect flowers carefully for insects.
• Rinse gently in clean water where appropriate.
• Discard petals that are slimy, badly damaged, discoloured or deteriorating.

For this product, use the petals as the edible portion rather than assuming every part of the plant is intended for culinary use.

Harvest & Storage

Calendula petals are best harvested close to when they will be used.

For fresh use:

1. Harvest clean, dry flowers.
2. Separate the petals.
3. Remove damaged material.
4. Place the petals in a clean container.
5. Refrigerate promptly.
6. Protect from crushing and excessive moisture.
7. Use while fresh and visually appealing.

For longer storage, dry the petals completely before sealing them in a container.