Growli

Plant care

Carrot 'Dragon' (Dragon carrot) care

Daucus carota subsp. sativus 'Dragon'

Also called Dragon carrot, purple red carrot.

RHS H4 (roots hardy in the ground over winter under mulch in milder areas)USDA 3-10 as a cool-season annualPet-safeIndoor Foliage 30-40 cm tall

Watering rhythm

Direct sun (at least 4-6 hours)

Water evenly, about 25 mm per week, keeping soil consistently moist

Light

Direct sun (at least 4-6 hours)

Soil

Deep, light, stone-free sandy loam

Humidity

40-70%

Temp

16-21°C

Pet safety

Pet-safe

Mature size

Foliage 30-40 cm tall

Care at a glance

Light

Most houseplants will scorch where carrot 'dragon' thrives. Give it the windowsill you'd otherwise leave empty because everything else burned there. Full sun, at least 6 hours, for sweet, well-coloured roots; shade slows growth and weakens both flavour and pigment. A plant moved abruptly from low light to direct sun bleaches in 48 hours — always acclimatise over a week.

Watering

For carrot 'dragon' in the ground or in a bed, aim for water evenly, about 25 mm per week, keeping soil consistently moist. Soak the root zone rather than misting the foliage; deep, less-frequent watering trains roots downward and produces a more drought-resilient plant by mid-season. Steady moisture grows straight, crack-free roots. Letting the soil dry then watering heavily makes roots split; consistency matters more than volume.

Soil and pot

Carrot 'Dragon' grows best in deep, light, stone-free sandy loam. Loose, deeply worked soil free of stones and fresh manure, pH 6.0-7.0. Stony, compacted or recently manured ground causes forked, split or hairy roots. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Carrot 'Dragon' sits happiest at around 40-70% humidity and 16-21°C (61-70°F). An adaptable outdoor crop unaffected by air humidity; root quality depends on even soil moisture and a fine, stone-free tilth, not ambient humidity. If you keep the room above 16 year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed carrot 'dragon' sparingly. Light feeder. Avoid high nitrogen and fresh manure, which fork the roots; grow in soil enriched the previous season and add only a balanced low-nitrogen feed if needed. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on carrot 'dragon' in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Carrot root flyLarvae tunnel rusty channels through the roots; sow thinly to avoid thinning, use fine insect mesh or fleece barriers, and avoid bruising foliage.
  • Forked or split rootsStones, fresh manure, compaction or uneven watering distort and crack the roots; prepare a deep, fine, stone-free bed and water consistently.
  • Faded purple colourLow light, heat or thin soils dull the anthocyanin skin colour; grow in full sun and good fertility for the deepest purple.
  • Green shouldersRoot tops exposed to light turn green and bitter; earth up or mulch over the crowns as roots swell.

Propagation

From seed, sown direct. Carrots resent transplanting, so sow seed thinly 1 cm deep where they are to grow from spring, thinning to 5 cm apart; sow in succession for a continuous harvest. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Carrot 'Dragon' is pet-safe. Garden carrot (Daucus carota subsp. sativus) is ASPCA-listed as non-toxic to cats and dogs (the ASPCA 'Carrot' entry). Raw carrot is a common safe treat, though whole roots or thick chunks should be cut down to avoid a choking hazard, especially for small dogs. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Carrot 'Dragon' care — frequently asked questions

What is the common name for Daucus carota subsp. sativus 'Dragon'?

Daucus carota subsp. sativus 'Dragon' is most commonly called Carrot 'Dragon', but it is also known as Dragon carrot, purple red carrot. The names refer to the same species, so care instructions for Carrot 'Dragon' apply identically to anything sold as Dragon carrot.

How much light does carrot 'dragon' need?

Carrot 'Dragon' grows best in direct sun (at least 4-6 hours). Full sun, at least 6 hours, for sweet, well-coloured roots; shade slows growth and weakens both flavour and pigment.

How often should I water carrot 'dragon'?

Water carrot 'dragon' water evenly, about 25 mm per week, keeping soil consistently moist. Steady moisture grows straight, crack-free roots. Letting the soil dry then watering heavily makes roots split; consistency matters more than volume. The finger-test (or lifting the pot to feel its weight) beats a fixed weekly calendar because pot size, light, and season all change how fast the soil dries.

Is carrot 'dragon' toxic to cats and dogs?

Carrot 'Dragon' is pet-safe. Garden carrot (Daucus carota subsp. sativus) is ASPCA-listed as non-toxic to cats and dogs (the ASPCA 'Carrot' entry). Raw carrot is a common safe treat, though whole roots or thick chunks should be cut down to avoid a choking hazard, especially for small dogs.

What USDA hardiness zone does carrot 'dragon' grow in?

Carrot 'Dragon' is rated for USDA zone 3-10 as a cool-season annual; roots tolerate light frost, which sweetens flavour and RHS hardiness H4 (roots hardy in the ground over winter under mulch in milder areas). Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Carrot 'Dragon' deep-dive guides

Every aspect of carrot 'dragon' care, each with its own calibrated guide:

Related guides

Carrot 'Dragon' is also commonly called Dragon carrot or purple red carrot.