Swiss Chard Seeds - Rainbow Mix


A firm favourite for brightening up beds and borders, these Rainbow Swiss Chard Seeds will help you produce an array of vibrant Swiss Chard with red, yellow and white stems and succulent deep green leaves. Joining forces to offer a winning combination of nutrients, colour and flavour, Rainbow Mix Swiss Chard is a fun and easy way to liven up your plot. Free British wild flower seeds included in every pack.


Swiss chard is a beginners plant that pro gardeners love too, and our Rainbow Mix is the most stunning combination of all. Vivid red, yellow and white stems support a lush dark green canopy worthy of any ornamental border or flower garden. Swiss chard is healthy, tasty and versatile in the kitchen. Easy to cultivate and with a broad tolerance of soils and seasons, this is a solid favourite at Grow Sow Greener and around the UK.

  • Pack size: 50 seeds
  • Time to germination: 5 -10 days
  • When to sow summer crop: April
  • When to sow winter crop: Mid July
  • Spacing: 30cm
  • Soil preference: Broad tolerance
  • Light preference: Full sun, part shade
  • When to harvest: Year-round

How to grow Rainbow Mix Swiss Chard from seed

Sow your Swiss Chard Rainbow Mix at a depth of 2cm. Successful germination occurs anywhere between 10 and 27 degrees, while 18 degrees is ideal. Sow direct or in coco pots in a sheltered position in the garden, greenhouse or under lights inside, and plant out, pot and all once robust enough to survive a passing slug or a stormy day.

Once established, swiss chard is easy to grow and require little attention. They benefit from weeding from time to time, but good crops are attainable for even the most distracted gardener.

What to feed your Swiss Chard plants

Swiss chard is extremely tolerant of soil conditions and nutrients, but they will reward you when given rich, moist soil loaded with plenty of organic matter. Add well-rotted manure and a few handfuls of fish, blood and bone meal with some volcanic rock dust and kelp powder to give them a balanced and diverse diet for strong organic growth and cropping over the year. This diet will also help the plants to form strong, well-developed immunity.

By preparing the hole/soil with the above organics before planting, you feed the whole soil ecosystem, which feeds your chard plants a much broader diet. Off the shelf bought chemical fertilisers are limited in their scope and kill life in the soil web, trapping the gardener into spending more time and money repeatedly fertilising. 

Keeping pests away

Good hygiene and nutrition are the best remedies. Adequate spacing and airflow coupled with a well-balanced diet, keep plants healthy and in the best shape to fend off illness and pests.

As this is such a beautiful variety, it's worthwhile to plant a few clumps in separate locations along an ornamental border and veg patch, limiting possible infestation damage. When ordering Rainbow Mix Swiss Chard from Grow Sow Greener, you'll receive British wildflower seeds loose in your pack, which will look beautiful and attract beneficial insects to your plot.

Shipping & Delivery

Shipping & Delivery

Delivery Costs

Our shipping is broken down into two categories and are dispatched the same or next day as standard.

1. Unlimited "Small" (Garden) Seed Packets:

- Including wooden plant markers and sprouting bags.

- £1.99 - Standard Delivery 2 - 4 business days.

- £4.90 Express Delivery 1 - 3 business days

2. Everything Else - Sprouting and Microgreen Seeds, Growing Equipment, Gifts and Grow Kits:

UK Mainland.

- £3.85 - Standard Delivery (2 - 4 business days) on orders between 0 and 2kg.

- £6.50 - Next Day Courier Service on orders 0 - 4.5kg.

- £8.95 - Next Day Courier Service on orders over 4.5kg.

- Contact us for a quote on orders over 26kgs.

Ireland, Northern Ireland, Isle of Man, Guernsey and Jersey.

- £9.45 - Standard Delivery (2 - 4 business days) on orders between 0 and 2kg.

- £23.50 - Standard Delivery on orders 2kg - 26kg.

- Contact us for a quote on orders over 26kg.

The EU, Switzerland and Rest of World.

Get in touch for equipment sales to the EU and the rest of the world for a competitive shipping quote. Unfortunately we cannot yet post seeds outside the UK.

Delivery and Packaging

All products are packaged plastic free as standard. Your garden seeds are sealed for freshness inside white glassine envelopes which are a water/vapour resistant compostable paper product whilst your Microgreen and Sprouting Seeds arrive in resealable zip lock pouches made from GMO free vegetable starch which are further heat sealed to ensure these great products reach you safely!