Rainbow carrot seeds: colour without new rules

You bought the packet for purple, red and yellow roots beside the usual orange. Rainbow carrot seeds are a colour mix, not a different crop with its own soil, fly or sowing depth. The Royal Horticultural Society already treats those colours as carrot. The bed still has to be fine, the cover still has to be shallow, and the envelope still has to contain seed.

The mix in this set is Meldon Seeds, model MP074, at £3.60 on the amazon.co.uk listing checked on 15 October 2026, with 4.1 from 191 reviews. The title says 250 seeds and names Rainbow, Red Samurai and Purple Haze. The colour line is orange, purple, red and yellow. Just Seed Red Samurai F1, at £1.45 for a stated 100 seeds, is one red variety, not that mix. Both sit in the carrot seed comparison. If you buy through a link there, we may earn a commission. We did not grow either packet, and we did not run a taste or nutrition test.

In short

Rainbow carrot seeds suit a short row when you want orange, purple, red and yellow for a salad or for children, and you can absorb a packet reviewers often found far short of 250 seeds. They are a poor buy when the title count is why you chose them, or when you wanted one red root. Colour does not change the soil, the carrot fly, or the sowing depth.

Colour is a look, not a new crop

A purple root is still a carrot. RHS notes treat purple, white and yellow as colours of the same crop. Catalogues put rainbow lines at the unusual end of an orange range. That is a remark about looks, not a yield trial of this packet. This page does not claim a purple root holds more of any nutrient than an orange one. Nothing in the listings weighed a crop or measured sugar.

People who got roots mention the bowl and children. People who did not get roots mention an empty line or a thin envelope. Both sit inside 4.1 from 191 reviews. The stars will not tell you whether your envelope is full.

The seller's maturity line is about 80 days, not an RHS trial. Early Nantes in the same set is sold at 65 to 75 days, so this mix is not the earliest orange. Eighty seller-days from April points at July, and from June at late summer, if the seed comes up. A yellow photograph does not add frost tolerance the listing never states.

The RHS mentions white carrots. This listing's colour line stops at orange, purple, red and yellow. The word rainbow does not promise a white root.

What the mix actually names

The title strings Rainbow, Red Samurai and Purple Haze together. Read that as the seller's description of one mix, not three sealed packets, and not a promise of equal shares. The colour attribute is the useful line: orange, purple, red and yellow. It still does not state a share. Your row can come up mostly orange, and you will have nothing on the listing to argue with.

Sunlight is given as full sun, partial shade and partial sun, which covers most of a British garden. Soil is listed as "All". That does not mean heavy clay, stones and fresh manure will give straight roots. Height is 50 cm: treat it as foliage on the form, not a root length for a pot. Item weight is 8 g, a parcel weight, not a count of 250 seeds.

The seller says pots, troughs, containers or beds, in about 80 days. One reviewer used a bucket off the ground. That is not a depth you can copy. For a container, use the containers page. The RHS cites pots of more than about 20 cm for baby carrots. This mix states no pot depth. Model MP074 does not count the seeds in the envelope.

A single red F1 is a different packet

Just Seed Red Samurai F1 is the other colour packet. On 15 October 2026 it was £1.45 for a stated 100 seeds, with 3.5 from 16 reviews. The colour attribute is red, with no purple and no yellow. Choose it for one red root. For the mixed bowl it is the wrong buy, even though £1.45 looks kinder than £3.60.

F1 means a hybrid. Seed saved from a root you like will not reliably grow the same carrot next year. That limit is not special to a red root. The listing does not state days to harvest, sun or pot depth. Three review texts record shoots after 10 to 12 days, about 60 seeds against a title of about 100, and about 10 plants. Sixteen reviews is a small sample beside 191 on the mix.

The material attribute says Organic, and a bullet cites a registration number and Defra. The title does not say certified organic seed, and those numbers were not checked on a public register for this article. A red root is not a certificate. The carrot seed comparison keeps that wording next to the price. Red Samurai on the Meldon mix is not the Just Seed packet. Purple Haze in that title is not a second listing you can price on its own.

The 250-seed title is disputed

The argument is the count. The title says 250 seeds. Reviewers describe fewer than 20, about 50, and no more than 70. Others describe a colourful crop when the seed did come up. The short-count complaint is repeated, so it is a buying risk. Some packets produced nothing. One crop was lost to slugs after the seedlings appeared: the seed worked, and the plants did not last.

At a true 250 seeds, £3.60 is a modest outlay for a family row. At a few dozen seeds you have paid the mix price for a taster. You cannot see the count until the envelope is open. The buying guide sets this title next to other packets whose titles and bullets also fail to agree.

If the row matters more than the colours, switch to an orange packet. Early Nantes in this set is the blunt early type. It will not give you purple roots, and it sits on a larger review sample. Buy the mix when colour is the point and a short count is one you can absorb. Sow one short drill. Do not plan three sowings from a title of 250 if the envelope is thin.

An empty line in June looks the same whether the packet was short or the seed rotted. Thirty seeds that all come up are a short packet that worked. A full title in a cold, smeared drill can rot and look like a dead variety. Tip the envelope onto paper, count roughly, and sow that.

Sowing rules that do not change

Purple roots still get carrot fly. The RHS describes the same small black fly and rusty tunnels, active from about May to October. A low fence is weaker than a full insect-proof mesh. Sow sparsely, because females follow the smell of thinning. A sowing after mid-May can miss the first generation, and lifting before late August can miss the second. Do not lay mesh over soil that already holds pupae. Colour does not change any of that.

The RHS and Gardeners' World describe a cover of about 1 cm. Several Meldon bullets, including this mix, say about 3 cm. One Early Nantes reviewer blamed a deep sowing when that row failed. Prefer the shallower cover unless the paper packet, rather than the Amazon bullet, says otherwise. The sowing guide puts that next to outdoor sowings from April to early July. An 80-day line does not move this mix into February.

Stones, fresh manure and transplanting split the root. Colour does not. Sow where the root will finish. On heavy clay a long root still forks, and a stump type is the change that helps. This mix does not call itself a stump. That shape choice is the Nantes or Chantenay page.

RHS notes put rows about 15 to 30 cm apart, and a full-size root wants roughly 5 to 7.5 cm in the row. A crowded mix can still give slim roots of several colours. It is not a heavier crop. Slugs still take seedlings, and fly mesh does not stop them. We did not cook these roots, so this page will not say that purple holds after cooking.