Cornflower Garden Seeds

Centaurea cyanus

Other names: bachelor’s button, witch bells

Used to discourage evil visitors but worn as a bachelor’s button by young men in love, the cornflower’s history can certainly seem contradictory. 

Profound, striking and elegant, a symbol of remembrance in France, the cornflower was also found in the tomb of Tutankhamun, the petals still colourful after 3,000 years. We can’t sell you a pyramid, what with planning regulations and a problematic workforce, but we all want to feel like an Egyptian emperor from time to time. This is the next best thing.

Easy to grow, these bright blue flowers will make your garden one of the wonders of the world and leave your guests shouting sacre bleu.

How to Plant

Cheap and Easy Method:

For a quick and cost-effective approach, simply scatter the seeds directly onto bare soil. This method requires minimal preparation but has a lower success rate as it heavily relies on natural conditions being favourable. Clear the area of any debris and lightly rake the soil to create a loose surface. Evenly broadcast the seeds across the soil, then lightly rake again to ensure good seed-to-soil contact. This method can also be done in a pot or growing box, making it versatile for various settings.

More Involved Method:

For better results, especially in areas with aggressive weeds or where the soil may be particularly challenging, consider using a terram membrane. This method involves laying a terram membrane over the planting area to suppress unwanted vegetation. Over this membrane, add a layer of soil that is suitable for Cornflower growth. Sow the seeds evenly across the soil surface and gently press them in to ensure good contact. This method, while more expensive and labour-intensive, greatly enhances the likelihood of establishing a vibrant and sustainable display of Cornflowers.

Alternative Methods:

1. Seed Trays and Transplanting: Start the seeds in seed trays or small pots indoors. Once the seedlings are large enough to handle, transplant them to their final growing location. This method allows you to control the early growth stages better and protect the young plants from adverse conditions.
2. Direct Sowing with Mulch: Scatter the seeds directly onto prepared soil and cover lightly with a thin layer of mulch. The mulch helps retain moisture and suppress weeds, giving the seeds a better chance to germinate and establish.

When to Plant

The optimal time to plant your Cornflower seeds is in the autumn (September to November) or early spring (March to May). These periods offer the best temperatures and adequate moisture levels for seed germination and root establishment.

Where to Plant

Cornflowers thrive in well-drained soil and full sunlight. Choose a location that receives at least six hours of direct sunlight per day. Avoid areas that are prone to waterlogging, as this can hinder seed germination and plant growth. They are adaptable to various soil types but prefer slightly alkaline to neutral pH soils.

Watering Schedule

During the initial establishment phase, maintain a consistent moisture level in the soil, keeping it moist but not waterlogged. Water the seeds gently to avoid washing them away. Once the plants are established, they typically require minimal watering, relying on natural rainfall. However, during prolonged dry spells, occasional watering may be necessary to maintain healthy growth.

Blooming Period

Cornflowers will generally bloom from late spring through early summer, approximately from May to July. The exact timing can vary based on regional climate specifics and yearly weather variations.

Expected Plant Height

Cornflowers typically grow to a height of 30 cm to 90 cm. This variation creates a textured, dynamic appearance that provides depth and interest, while also supporting a diverse range of wildlife and pollinators.

Summary of Planting Methods

Cheap and Simple Method:

• Scatter seeds directly onto bare soil or in pots/growing boxes.
• Lightly rake the soil before and after scattering seeds.
• Suitable for small and large areas.

More Involved Method:

• Use a terram membrane to suppress weeds.
• Add a suitable soil layer over the membrane.
• Sow seeds and press them in gently.
• More labour-intensive but higher success rate.

Alternative Methods:

1. Seed Trays and Transplanting: Start seeds indoors and transplant seedlings.
2. Direct Sowing with Mulch: Scatter seeds and cover lightly with mulch.