Sale Sold out

Open-pollinated seeds Asteraceae

ornamental flower

Dwarf sulphur cosmos

Name: Dwarf sulphur cosmos
Brand: Le potager ornemental de Catherine
SKU: POC-SEMENCES
Price: 4.19 CAD
Availability: InStock

Cosmos sulphureus

Grow Dwarf sulphur cosmos from these flower seeds to bring out the characteristic colour, shape and growth habit of its flowers. Dwarf sulphur cosmos forms a compact mound 30 to 40 cm (12 to 16 in) in height, with semi-double orange flowers. Its flowers, from July until frost, attract pollinators. It is especially recommended for borders and containers. Watch the buds open and check the condition of the flowers. When the variety is suitable for bouquets, cut a few stems with a clean tool and place them in water promptly. In a flower bed, remove only the faded flowers when you want a tidy display rather than saved seeds. Start seeds indoors in mid-May. Transplant or sow directly in the garden in early June. Sow the seeds at a depth of 6 mm (0.2 in). The recommended location is full sun.

Quantity: ±70 seeds
Exposure: Full sun
Life cycle: Annual

Common nameDwarf sulphur cosmos

FamilyAsteraceae

GenusCosmos

Speciessulphureus

TypeOpen-pollinated seeds

Botanical nameCosmos sulphureus

Reproducible seedsYes

Dwarf sulphur cosmos belongs to Cosmos sulphureus. The plant completes its life cycle in one season. The flowers are orange and semi-double. A compact, ball-shaped plant, 30 to 40 cm (11.8 to 15.7 in.) tall. Long flowering period from July until frost. Very suitable for borders or container growing. The flowers are appreciated by visiting pollinators. These characteristics help you choose its position in the garden and compare this selection with other cultivars in the same group. Plan its location around its growth, leaving enough room to observe and care for the plant.

Choose a growing location in full sun, with soil that allows excess water to drain away freely. Start seeds indoors in mid-May. Transplant or sow directly in early June. Sow the seeds at a depth of 6 mm (0.2 in). Leave 40 cm (15.7 in) between plants. In Quebec, adjust the timing of planting to the frost risks in your particular area and to the life cycle of the plant. Keep the growing mix slightly moist during emergence without saturating it, and provide light as soon as seedlings appear. If sowing begins indoors, acclimatize the seedlings to wind and sun before planting them in the garden.

Position the plants where their flowers will remain clearly visible, taking their expected height and spread into account when arranging the planting. Leave access for watering at the base, following buds as they open and removing damaged stems. Group plants with similar requirements for light exposure and soil moisture, while avoiding crowding young plants together simply to create an immediate visual effect. Leave enough room for the foliage as it continues to grow and develop through the season. For this annual, follow flowering through the season and choose which stems to keep for their seeds. Keep labels in place to recognize each variety, even after the flowers have faded. Keep these flower seeds dry until the next sowing.

Sowing guide

It all startswith a seed.

Sowing depth

6 mm (0.2 in)

Spacing / density

40 cm (15.7 in)

Sowing period

Start seeds indoors mid-May. Transplant or direct sow in the garden early June.

Propagation

Seed sowing

Growing method

These seed-starting tips for Dwarf sulphur cosmos concern gardening in Quebec and can be adjusted to local frost risks. Start seeds indoors in mid-May. Transplant or sow directly in the garden in early June. Sow the seeds at a depth of 6 mm (0.2 in). Leave 40 cm (15.7 in) between plants. This crop is identified as Cosmos sulphureus. Arrange flowers according to their actual height: taller plants should remain visible without completely hiding a lower border. Leave access for cutting a stem or removing a faded flower. Observe a colour mix plant by plant; it does not guarantee every colour in each small group. Prepare the final growing site and seed-starting supplies first. For seed starting in pots, moisten the growing mix before filling the cells, then sow without compressing it into a hard mass. For direct sowing, remove large soil clods and mark a row that you can locate again after watering. Distribute seeds according to the intended spacing rather than pouring several into one spot. Water the growing medium gently so that the flow of water does not displace the seeds you have sown. Once the seedlings have emerged, keep the healthy young plants and allow enough space for them to continue developing. If seedlings are started indoors, gradually acclimatize them to outdoor conditions before planting them out. Handle the root ball carefully without pulling on the stem. Transplant into prepared soil, then water to help the soil settle into contact with the root ball. Its flowers, from July until frost, attract pollinators.

Soil and care

The right care,at the right time.

Care level

Moderate

Watering

For Dwarf sulphur cosmos, adjust watering to the stage of growth. Avoid automatic daily watering after establishment: where specified, the source describes dry soil or low-water cultivation. Water the seedbed gently so that the seeds remain in place. After establishment, check moisture near the roots rather than judging only by the appearance of the leaves. Direct water to the base and adjust the amount according to rainfall. Check a wind-exposed container more often; excess water must be able to drain freely.

Soil type

For Dwarf sulphur cosmos, the source recommends well-drained soil. Prepare soil that the roots can explore, without large clods around the seeds. Assess drainage after rain as well: water should not remain around the crown for long. In containers, use a growing mix rather than heavy, compacted garden soil. The fertility requirements described for this plant should guide additions, without automatically adding large amounts of compost.

Fertilization

When feeding Dwarf sulphur cosmos, begin with the fertility of the growing medium. Do not try to produce a large mass of leaves by applying heavy amounts of nitrogen; respect the actual needs of this crop. Before applying fertilizer, examine the soil or growing mix already in use. Measure each application according to the label and the crop's needs, without combining several products at once. In containers, account for nutrients already present in the growing mix. A plant that is suffering from a lack of water cannot be helped simply by applying additional fertilizer.

Moisture

Even moisture without saturation

Seasonal care

When caring for Dwarf sulphur cosmos, take the following characteristic into account: dwarf sulphur cosmos forms a compact ball 30 to 40 cm (12 to 16 in.) tall, with semi-double orange flowers. Its flowers, from July until frost, attract pollinators. It is especially recommended for borders and containers. Monitor the flower buds throughout the growing season and use a clean tool to remove any stems that have broken. Cutting flowers to make a bouquet and keeping flowers for seed saving are two different choices for managing the plants. Retain a few seed capsules only if you want seeds, watching for them to open before dispersal. Start the season with a prepared site and labelled seedlings. During emergence, check that moisture reaches the seed zone without creating a persistent puddle. After planting, observe establishment before adding more fertilizer or pruning. Remove small weeds and check damaged leaves so that isolated damage is not mistaken for a need for fertilizer. Throughout summer, adjust watering to the condition of the soil and the rain received. Check support ties after windy weather, and do not let a tie constrict a thickening stem. Make cuts with a clean tool; do not remove a healthy stem simply to improve the view. In fall, separate what should be harvested, left in place or removed according to the plant's life cycle. After detaching the stems, put the supports away and clean your tools; take care not to move diseased plant debris into other growing areas. Whether the plant returns in spring depends on its stated life cycle, not simply on the word garden in its description. Watch the buds open and check the condition of the flowers. When the variety is suitable for bouquets, cut a few stems with a clean tool and place them in water promptly.

Container growing

A garden,within reach.

Suitable for containers

Yes

Growing Dwarf sulphur cosmos in a pot must accommodate this development. Dwarf sulphur cosmos forms a compact mound 30 to 40 cm (12 to 16 in) in height, with semi-double orange flowers. Its flowers, from July until frost, attract pollinators. It is especially recommended for borders and containers. A container must suit the plant's growth habit, not merely the size of a flower. Place tall specimens in a stable pot and leave air space around the stems. For a documented low border, choose a planter that lets each plant develop without immediate competition. The recommended location is full sun. Check the drainage openings before filling the container. Use potting mix intended for container growing, then moisten it to prevent a dry centre in the root ball. Place the pot in its location before it becomes heavy. Leave space below the rim to water without washing away the potting mix. Allow the space each plant needs: pot volume should not be chosen according to the size of the seed packet. Water slowly to moisten the root ball, then empty the saucer if water remains in it. Also check the weight and stability of the entire setup after installing a support. Nutrient applications should account for the potting mix used and the instructions for the chosen fertilizer. Rehydrate a dried-out planter gradually, without flooding the roots to compensate for several days of neglect. Start seeds indoors in mid-May. Transplant or sow directly in the garden in early June. Sow the seeds at a depth of 6 mm (0.2 in).

Bloom and dimensions

Its place,in your garden.

Mature height

30 to 40 cm (11.8 to 15.7 in)

Growth habit

Compact or bushy

Bloom period

Observe flowering in Dwarf sulphur cosmos using these guidelines. Dwarf sulphur cosmos forms a compact mound 30 to 40 cm (12 to 16 in) in height, with semi-double orange flowers. Its flowers, from July until frost, attract pollinators. It is especially recommended for borders and containers. Watch the buds and flowers according to this plant's life cycle. A stated time frame shifts with growing conditions; it does not set the same date for all of Quebec. Cut flowers for bouquets only when this use is documented.

Garden associations

In goodcompany.

Companion plants

When choosing companions for Dwarf sulphur cosmos, consider light, access and space. Place this plant alongside crops with compatible light and moisture needs, preserving the space required for its foliage. Plan companion planting around the available space and growing requirements. Leave enough light and air around the plant, and keep taller neighbours from covering its foliage. A practical arrangement of plants makes watering and harvesting easier to manage; it does not, by itself, guarantee protection against insect pests or an increase in yield. Keep every crop accessible and maintain its individual spacing.

Frequently asked questions

Your questions,answered.

How do you sow Dwarf sulphur cosmos seeds?

When growing Dwarf sulphur cosmos, start seeds indoors in mid-May. Transplant or sow directly in the garden in early June. Sow the seeds at a depth of 6 mm (0.2 in). Leave 40 cm (15.7 in) between plants. To choose a sowing date in Quebec, begin with your local frost risk, then apply the timing recommended for this crop. Always plan indoor seed starting by counting backwards from the expected planting date; do not start the seeds too early simply on principle. Prepare containers before sowing and label the variety. Maintain moisture suited to the seeds without leaving standing water. When sowing directly in the garden, prepare the row before distributing the seeds and water gently.

How much space should you allow for Dwarf sulphur cosmos?

When growing Dwarf sulphur cosmos, dwarf sulphur cosmos forms a compact ball 30 to 40 cm (12 to 16 in.) tall, with semi-double orange flowers. Its flowers, from July until frost, attract pollinators. It is especially recommended for borders and containers. Arrange flowers according to their actual height: taller plants should remain visible without completely hiding a lower border. Leave access for cutting a stem or removing a faded flower. Observe a colour mix plant by plant; it does not guarantee every colour in each small group. Choose the position according to this plant's habit and growth, then leave access for watering and cutting. If the plants require a support, put it in place before their stems begin to grow longer. The distance between plants does not replace a working aisle.

How should you manage watering for Dwarf sulphur cosmos?

For Dwarf sulphur cosmos, avoid automatic daily watering after establishment: where specified, the source describes dry soil or low-water cultivation. Check the growing mix or soil near the roots before watering. Water must reach the root ball, and excess water must then be able to drain from the container or soil. Recent rain, wind and heat affect how often watering is needed. Water at the base rather than routinely wetting the flowers and foliage. When a plant wilts, check its root ball as well: adding water to an already saturated root ball will not solve every problem. Use a gentle stream when watering newly sown seeds. Monitor the flower buds throughout the growing season and use a clean tool to remove any stems that have broken. Cutting flowers to make a bouquet and keeping flowers for seed saving are two different choices for managing the plants.

What container should you choose for Dwarf sulphur cosmos?

For Dwarf sulphur cosmos, a container must suit the plant's growth habit, not merely the size of a flower. Place tall specimens in a stable pot and leave air space around the stems. For a documented low border, choose a planter that lets each plant develop without immediate competition. The container must allow roots and stems to develop without making harvesting or maintenance difficult. Check the drainage holes before adding potting mix. Secure a support covered in foliage against the wind. In summer, check potting mix more often than garden soil, because its volume is limited. For a very spreading plant or a crop that takes a long time to mature, favour a generous planter or the ground over a small decorative container. Do not infer a precise volume from the variety name alone.

What growth stage should you look for in Dwarf sulphur cosmos?

For Dwarf sulphur cosmos, watch the buds open and check the condition of the flowers. When the variety is suitable for bouquets, cut a few stems with a clean tool and place them in water promptly. In a flower bed, remove only the faded flowers when you want a tidy display rather than saved seeds. Dwarf sulphur cosmos forms a compact mound 30 to 40 cm (12 to 16 in) in height, with semi-double orange flowers. Its flowers, from July until frost, attract pollinators. It is especially recommended for borders and containers. The schedule is a guide, but observing the plant determines the right moment. Follow the recommended stage for the part harvested, and distinguish botanical maturity from culinary quality. Harvest with a clean tool when the stem resists, and immediately sort out damaged parts. For a bouquet flower, choose a healthy stem when this use is confirmed.

Wildlife and pets

Life,around your plants.

Supporting wildlife

The supplier describes the flowers of Dwarf sulphur cosmos as attractive to pollinating insects. Keep some flowers accessible while open if you want to observe these visits. The presence of insects also depends on the surrounding environment and the time of year; this information does not guarantee a particular number of visiting insects or protection against every garden pest.