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

UK, N.Ireland and Scotland:

- Spend over £45 for FREE UK delivery.

- £1.95 postage on unlimited packets of all small seed packs (excluding Microgreen Seeds and Sprouting Seeds)

- £4.90 postage on all Microgreen Seeds, Sprouting Seeds and all other equipment

- £6.85 postage on all orders of combined small seed packs and parcels under £45

Delivery Information

The prices quoted are for UK mainland addresses. Deliveries to parts of Scotland, the Scottish Highlands and Islands, the Channel Islands, the Isle of Man and the Isle of Wight may incur an additional postage cost to the customer. In such circumstances, we will contact customers to let them know of any additional cost and offer the choice of whether to proceed or cancel their order.

Whenever possible, goods will be dispatched by Courier post within 3-5 working days from the date of purchase. Due to our delivery being outsourced, we cannot always guarantee next day delivery, so please allow for this. Please bear in mind there may be delays when ordering over weekends and national holidays when placing your order. If an order is needed for a definite date, please contact us prior to ordering, so we can advise beforehand.

In the event that you select a business address, we shall be deemed to have delivered your order to its intended recipient by delivering it to the reception area of the business address.

We will deliver to the address as you enter it and can not accept any liability for late or failed delivery if the quoted address is incorrect. Additional charges will be made for redirection or for re-delivery due to postcode error. We advise that if you are not sure of the address you should check it using the Post Office postcode and address finding service.