







Centaurea cyanus

Centaurea cyanus

Nigella damascena

Centaurea cyanus

Saponaria vaccaria

Cosmos bipinnatus

Helianthus annuus

Cosmos bipinnatus

Cosmos bipinnatus

Cosmos bipinnatus

Cosmos bipinnatus

Nigella damascena

Daucus carota

Centaurea cyanus

Cosmos bipinnatus

Centaurea cyanus

Centaurea cyanus

Cosmos bipinnatus

Bupleurum rotundifolium

Calendula officinalis

Cosmos bipinnatus

Cosmos bipinnatus

Delphinium consolida

Zinnia elegans

Centaurea cyanus

Delphinium consolida

Didiscus caerulea

Limonium sinuatum

Cosmos bipinnatus

Cosmos bipinnatus
Blue cornflower 'Tall Double Blue Boy' is a classic hardy annual that absolutely revels in cooler weather. Although it's theoretically possible to start it indoors, direct sowing into a permanent location unequivocally brings the best results. The plants form a taproot and tolerate root ball disturbance during transplanting very poorly. If you do decide to start them indoors, you must begin 3–4 weeks before planting out, use a seed tray with large cells, and be extremely careful when handling them. However, it's much easier and more reliable to wait for early spring. You can start sowing outside as soon as the soil thaws and can be worked, which in our region is often during March. Cornflowers germinate at temperatures around 16–20 °C, but they can tolerate a colder spring start.
Cornflowers are also a great choice for autumn sowing (August–September). The seedlings will form a basal rosette before winter, overwinter without problems, and in the spring will reward you with earlier and much more robust blooming than those sown after winter.
Sow the seeds in rows to a depth of approximately 0.5 cm and cover with soil, do not leave them on the surface. Keep the soil evenly moist, germination usually takes 5–10 days. Since this variety grows to an impressive height of 60–80 cm, it is absolutely crucial to thin out the plants to a distance of 15–20 cm after emergence. If you leave the sowing too dense, the plants will be weak, more susceptible to fungal diseases (especially powdery mildew), and will not produce as many flowers. So don't be afraid to thin them as soon as the first true leaves appear. For continuous blooming, we recommend making 2–3 sowings a few weeks apart while the cooler spring weather lasts.
It is good to use support for cornflowers. You can stretch a support net horizontally for the plants to grow through, or surround the bed with string attached to stakes. Support will ensure that the stems do not twist or fall over in the wind, which you will appreciate especially when cutting for vases.
We harvest for the vase in the half-open bud stage or as freshly opened flowers. As soon as the color starts to show and the first petals begin to open, it is the ideal time. If harvesting for drying, choose fresh, fully opened flowers. Hang them upside down in a dry, ventilated, and dark place.
The information given is based on our experience, please use it as a guide only. Times may vary depending on the season, climate, location, sowing and transplanting dates and possibly also the conditions in the greenhouse/greenhouse. We always recommend testing how the plant performs in your conditions. Please do not take this as a guarantee.






The product can be found in the following collections.




A seed bundle for a smaller garden. We selected petite species and smaller flowers. It's a great little "tasting menu" of our…

Centaurea cyanus

Centaurea cyanus

Centaurea cyanus

Centaurea cyanus

Centaurea cyanus

Centaurea cyanus

Centaurea cyanus

Centaurea cyanus

Centaurea cyanus

Centaurea cyanus

Centaurea cyanus

Centaurea imperialis

Cosmos bipinnatus

Cosmos bipinnatus

Cosmos bipinnatus

Cosmos bipinnatus

Daucus carota

Cosmos bipinnatus

Cosmos bipinnatus

Zinnia elegans

Cosmos bipinnatus

Centaurea cyanus

Cosmos bipinnatus

Saponaria vaccaria

Centaurea cyanus

Cosmos bipinnatus

Zinnia elegans

Helianthus annuus

Limonium sinuatum

Centaurea cyanus

Delphinium consolida

Cosmos bipinnatus