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Asteraceae
Weston
Cosmos Mix Seeds
Cosmos bipinnatus
Cosmos Mix is a cosmos mix cultivar selected for home food or ornamental gardens. It prefers full sun and average, well-drained soil; avoid excessive fertility. Direct sow after the last frost or start indoors 4 to 6 weeks before transplanting. Sow about 6 mm deep. Allow 23 to 30 cm between plants. Water regularly during establishment, then moderately. For best results, label the row and observe the plants regularly as conditions change through the season. Adjust watering to rainfall, wind, container size, and the actual moisture at soil level. Good air circulation and adequate spacing help foliage dry normally after rain or irrigation. Keep the growing area free of weeds that compete for light, moisture, and nutrients. Use clean tools for harvest and remove damaged plant material when it appears.
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Discover the plant
Common nameCosmos Mix
FamilyAsteraceae
GenusCosmos
Speciesbipinnatus
CultivarCosmos
Typeflower
Botanical nameCosmos bipinnatus
Cosmos Mix Seeds (Cosmos bipinnatus) This cosmos mix produces varied flower colours above finely cut, airy foliage. Plan this variety for an ornamental bed, border, or suitable container, according to its mature size and growing requirements. Adjust watering to rainfall, wind, container size, and the actual moisture at soil level. Good air circulation and adequate spacing help foliage dry normally after rain or irrigation.
Direct sow after the last frost or start indoors 4 to 6 weeks before transplanting. Sow about 6 mm deep. Keep the seedbed evenly moist through emergence. Allow 23 to 30 cm between plants. Provide full sun and avoid standing water. A germination temperature of 20 to 22°C is appropriate for this crop. Thin crowded seedlings early and harden indoor-started plants gradually before transplanting.
Follow the packet's guidance for the appropriate cutting or harvest stage. Cosmos Mix is suited to beds, borders, or containers where its form and flowering can be appreciated. Pair it with plants that prefer comparable light, moisture, and drainage. Water regularly during establishment, then moderately. Keep the planting accessible for observation, watering, harvest, or grooming. Use clean tools, remove damaged material, and store unused seed in a cool, dry, dark location. Choose compatible neighbouring plants and maintain enough room for air circulation.
In the garden
- Exposure
- Full sun
- Life cycle
- Annual
Sowing guide
Sowing & germination
Sowing depth
6 mm
Spacing / density
23 to 30 cm between plants
Germination temperature
20 to 22°C
Germination time
7 to 10 days
Sowing period
Direct sow after the last frost or start indoors 4 to 6 weeks before transplanting
Propagation
Seed
Growing method
Prepare a clean seedbed or containers with average, well-drained soil; avoid excessive fertility. Direct sow after the last frost or start indoors 4 to 6 weeks before transplanting. Sow about 6 mm deep unless the packet gives a more specific direction. Use the following spacing as the crop develops: 23 to 30 cm between plants. Keep the medium evenly moist during emergence without leaving it saturated. Provide full sun and good air movement. Thin crowded seedlings early so the remaining plants develop without unnecessary competition. Harden indoor-started plants gradually before transplanting them outdoors after the appropriate frost date. Water regularly during establishment, then moderately. For best results, label the row and observe the plants regularly as conditions change through the season. Adjust watering to rainfall, wind, container size, and the actual moisture at soil level. Good air circulation and adequate spacing help foliage dry normally after rain or irrigation. Keep the growing area free of weeds that compete for light, moisture, and nutrients. Use clean tools for harvest and remove damaged plant material when it appears. Always follow the packet information when a variety-specific direction differs from general guidance. A simple garden label makes the cultivar easy to identify from sowing through harvest or flowering. Check young plants frequently because small moisture or pest problems are easier to address early.
Soil and care
Soil & care
Watering
Water regularly during establishment, then moderately. Check moisture at soil level instead of watering only by schedule. Water gently during germination so seeds are not displaced, then direct irrigation toward the root zone. Avoid standing water and adjust frequency after rain. For best results, label the row and observe the plants regularly as conditions change through the season. Adjust watering to rainfall, wind, container size, and the actual moisture at soil level.
Soil type
Cosmos Mix performs best in average, well-drained soil; avoid excessive fertility. Loosen compacted ground before sowing and remove large stones or persistent weeds. Mature compost may improve poor soil, but avoid creating a heavy or waterlogged seedbed. For best results, label the row and observe the plants regularly as conditions change through the season. Adjust watering to rainfall, wind, container size, and the actual moisture at soil level. Good air circulation and adequate spacing help foliage dry normally after rain or irrigation. Keep the growing area free of weeds that compete for light, moisture, and nutrients.
Fertilization
Prepare the soil with mature compost when fertility is low. A light, balanced fertilizer may be used according to its label, but excessive feeding can cause weak or unbalanced growth. Observe leaf colour and plant development before adding more nutrients. Water after any application. For best results, label the row and observe the plants regularly as conditions change through the season. Adjust watering to rainfall, wind, container size, and the actual moisture at soil level.
Seasonal care
At sowing time, prepare average, well-drained soil; avoid excessive fertility and follow this timing: Direct sow after the last frost or start indoors 4 to 6 weeks before transplanting. Keep the surface moist until emergence, label the row, and thin seedlings according to the recommended spacing. During active growth, provide full sun and monitor soil moisture, weeds, and leaf condition. Water regularly during establishment, then moderately. In warm or windy weather, check containers and exposed beds more frequently. Remove damaged material and keep enough space for air circulation. At harvest or after flowering, use clean tools and clear unhealthy debris. Healthy residue may be composted where appropriate. At the end of the season, clean containers and tools, record useful observations, and store remaining seed in a cool, dry, dark place. For best results, label the row and observe the plants regularly as conditions change through the season. Adjust watering to rainfall, wind, container size, and the actual moisture at soil level. Good air circulation and adequate spacing help foliage dry normally after rain or irrigation. Keep the growing area free of weeds that compete for light, moisture, and nutrients. Use clean tools for harvest and remove damaged plant material when it appears. Always follow the packet information when a variety-specific direction differs from general guidance. A simple garden label makes the cultivar easy to identify from sowing through harvest or flowering. Check young plants frequently because small moisture or pest problems are easier to address early.
Container growing
Container growing
Choose a pot that allows the clump to develop and keeps the flowers accessible.
Bloom and dimensions
Size, flowering & harvest
Mature height
51 to 61 cm (20–24 in)
Width / spread
15 to 20 cm (6–8 in)
Days to maturity
6 to 8 weeks after sowing
Harvest
Follow the packet's guidance for the appropriate cutting or harvest stage.
Garden associations
Companion plants & uses
Companion plants
Low foliage plants can complement the flowers when their light requirements are compatible.
Other recommended plants
Lupin Mix; Radicchio Mix; Snapdragon Mix
Garden use
Cosmos Mix is suited to ornamental beds, borders, and containers where its form and flowering can be appreciated. Combine it with plants that need similar light, drainage, and watering. Its named cultivar makes it useful for a planned colour scheme or a clearly labelled flower collection. For best results, label the row and observe the plants regularly as conditions change through the season. Adjust watering to rainfall, wind, container size, and the actual moisture at soil level. Good air circulation and adequate spacing help foliage dry normally after rain or irrigation. Keep the growing area free of weeds that compete for light, moisture, and nutrients.
Frequently asked questions
Frequently asked questions
How should Cosmos Mix be sown?
Direct sow after the last frost or start indoors 4 to 6 weeks before transplanting. Prepare average, well-drained soil; avoid excessive fertility. Sow about 6 mm deep. Keep the seedbed evenly moist until emergence without saturating it. Label the row and provide full sun. Thin crowded seedlings so the final spacing follows this guidance: 23 to 30 cm between plants. If plants are started indoors, provide strong light and harden them gradually before transplanting outdoors at the appropriate time. For best results, label the row and observe the plants regularly as conditions change through the season. Adjust watering to rainfall, wind, container size, and the actual moisture at soil level. Good air circulation and adequate spacing help foliage dry normally after rain or irrigation.
Where should I grow Cosmos Mix?
Light: Full sun. Prepare soil for the flower’s needs, keeping the root zone well aerated. Light: Full sun. Cosmos Mix prefers full sun and average, well-drained soil; avoid excessive fertility. Choose a location that leaves enough room for 23 to 30 cm between plants. Avoid low spots where water remains after rain. In a container, use drainage holes and a clean growing mix. Observe how light moves across the space during the day, especially near buildings or taller plants. For best results, label the row and observe the plants regularly as conditions change through the season. Adjust watering to rainfall, wind, container size, and the actual moisture at soil level. Good air circulation and adequate spacing help foliage dry normally after rain or irrigation. Keep the growing area free of weeds that compete for light, moisture, and nutrients.
How should I water Cosmos Mix?
Water at the base and check root-ball moisture, especially after transplanting. Water regularly during establishment, then moderately. During germination, use a gentle spray or careful watering so seed is not displaced. After establishment, water at soil level when the surface begins to dry. Adjust frequency to rainfall, heat, wind, soil texture, and container size. Avoid standing water because roots still require oxygen. Morning watering can help foliage dry normally during the day. For best results, label the row and observe the plants regularly as conditions change through the season. Adjust watering to rainfall, wind, container size, and the actual moisture at soil level. Good air circulation and adequate spacing help foliage dry normally after rain or irrigation. Keep the growing area free of weeds that compete for light, moisture, and nutrients.
What maintenance does Cosmos Mix need?
Keep the planting labelled, weeded, and appropriately spaced. Check young plants regularly for wilting, chewing damage, discolouration, or crowding. Provide full sun and maintain the moisture pattern described for the crop. Use clean tools, avoid deep cultivation near established roots, and remove unhealthy debris. Apply any fertilizer or pest-control product only according to its label. For best results, label the row and observe the plants regularly as conditions change through the season. Adjust watering to rainfall, wind, container size, and the actual moisture at soil level. Good air circulation and adequate spacing help foliage dry normally after rain or irrigation. Keep the growing area free of weeds that compete for light, moisture, and nutrients. Use clean tools for harvest and remove damaged plant material when it appears.
How can Cosmos Mix flower well?
Flowering depends on sowing time, temperature, light, and normal plant development. Give Cosmos Mix full sun, suitable spacing, and steady care without waterlogging the roots. Avoid excessive nitrogen, which can favour soft foliage over flowers. Remove faded blooms when appropriate, or leave selected heads to mature when seed collection or wildlife value is desired. For best results, label the row and observe the plants regularly as conditions change through the season. Adjust watering to rainfall, wind, container size, and the actual moisture at soil level. Good air circulation and adequate spacing help foliage dry normally after rain or irrigation. Keep the growing area free of weeds that compete for light, moisture, and nutrients. Use clean tools for harvest and remove damaged plant material when it appears.
Outils
Compostage et écologie
