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Nigella or shahi jeera

Updated: 21 October 2026

You are looking at two dark seeds, or at two amazon.co.uk titles, and both say black cumin. Nigella or shahi jeera is the split that decides the dish. Kalonji is a matte, angular seed from Nigella sativa. Shahi jeera is a thin crescent from a different plant, Bunium persicum. The English title does not choose. The [Black cumin seeds comparison](/hub/herb-seeds/black-cumin-seeds) holds prices for the six listings. We are not ranking them here, and we are not giving a sowing calendar. A qualifying purchase through our links can earn a commission at no extra cost to you.

You are looking at two dark seeds, or at two amazon.co.uk titles, and both say black cumin. Nigella or shahi jeera is the split that decides the dish. Kalonji is a matte, angular seed from Nigella sativa.

Our top picks

SAFLAX SAFLAX organic black cumin, 300 seeds

Best overall

SAFLAX SAFLAX organic black cumin, 300 seeds
7.7/10about £4.55
View offer
Busy Beans Organic Busy Beans Organic nigella seeds, 250 g

Best value

Busy Beans Organic Busy Beans Organic nigella seeds, 250 g
7.1/10about £6.95
View offer
Spice Mart Spice Mart shahi kali jeeri, 50 g

Alternative

Spice Mart Spice Mart shahi kali jeeri, 50 g
2.4/10about £3.75
View offer
On this page
  1. 1.Two plants, one English name
  2. 2.Shape on the palm
  3. 3.Where each one belongs
  4. 4.Listings that still mix them

Two plants, one English name

Shops use black cumin for both plants. Nigella sativa is in the buttercup family, Ranunculaceae. The RHS lists it as an annual whose seeds are used in cooking. Cooks call the seed kalonji, and British packets also say black onion seed. It is not a kind of cumin. Bunium persicum is in the parsley family, Apiaceae, with cumin and caraway. The RHS page for that species is the other plant titled black cumin, and the name status there is unresolved. Hari Ghotra is plain: the crescent sold as shahi jeera is not nigella. Busy Beans, LoveSunnah and HMW name nigella or Nigella sativa. They are on the kalonji side if the shape matches. They are not evidence about shahi jeera.

Shape on the palm

Tip a few seeds into your palm. Kalonji is matte and angular, tear-drop shaped, and it does not curve into a slim horn. Shahi jeera is a thin crescent, finer and darker than ordinary cumin, and it keeps that curve when you roll it. Ordinary cumin is larger and browner, which is the Natco confusion: reviews said the seeds were not black, or were ordinary cumin, or were black cumin and not kalonji. Caraway is a sharper, more aniseed crescent, and it is a shop trap rather than a row in this set. If the seeds curve but smell like the caraway you know from bread, stop. Do not use price to tell these plants apart.
SAFLAX SAFLAX organic black cumin, 300 seeds

Testsieger

SAFLAX SAFLAX organic black cumin, 300 seeds
7.7/10about £4.55
View offer

Where each one belongs

Use kalonji for the onion-pepper note: naan after the bread is cooked, a short sizzle in pickle oil, and one seed in panch phoran. The Curry House gives tear-drop Nigella sativa to naan and to Bengali vegetable dishes, not to pilau as if it were kala jeera. Grit in a Busy Beans spoon is a packing fault, not a change of species. Use the thin crescent as a fine cumin. The Curry House puts kala jeera in pilau. Hari Ghotra uses shahi jeera whole in rice and calls it milder, sweet and floral. The steps are on how to use black cumin seeds. This set has no pouch that names the crescent once without also claiming the buttercup family. If you only have one seed, change the dish rather than the name.

Listings that still mix them

Natco is the missing name: 100 g from India at £4.24, 4.6 from 141 reviews. The listing does not state a species, and live text says this black cumin is not nigella. You cannot file it as kalonji or as shahi jeera from the words on the page. Open it and use the palm test, or leave it out of a recipe that names one of the two. Spice Mart is the clash: 50 g at £3.75, no rating, a title that says shahi kali jeeri and a bullet that says the buttercup family. Angular means nigella under a shahi jeera title. A crescent means the bullet named the wrong family. Which row can serve which job is on best black cumin seeds.

Common questions

Are kalonji and shahi jeera the same spice?
No. Kalonji is Nigella sativa, a buttercup-family seed, also called black onion seed. Shahi jeera, or kala jeera, is the thin crescent associated with Bunium persicum, in the parsley family. Shops put black cumin on both. The shared English name is the problem, not a hint that you can interchange them.
Which family is which?
Nigella sativa is Ranunculaceae, the buttercup family. Bunium persicum is Apiaceae, the parsley family, with cumin and caraway. The RHS lists both under the title black cumin. The name status of Bunium persicum on the RHS page is unresolved, so use the family and the shape together rather than treating the Latin line as fully settled.
How do I tell them from ordinary cumin?
Ordinary cumin is larger and browner. It is the seed a Natco reviewer thought was in the pouch, beside another comment that the seeds were not black. If the spoon looks like your usual cumin, you have neither kalonji nor a fine shahi jeera. Caraway is a sharper crescent and a separate trap when a shop uses the shahi jeera name loosely.
Can I use one on naan and the other in pulao?
Use nigella on naan and in pickles. Use the crescent in pulao or pilau. The Curry House draws that line: kalonji for naan, kala jeera for pilau. Swapping them gives you a different dish. If you only have one seed, cook the dish that seed belongs to.
Why do both packets say black cumin?
Because the English trade name is shared. The RHS uses black cumin for Nigella sativa and again for Bunium persicum. Retail titles follow that habit. Read the botanical name, or look at the shape. Busy Beans, LoveSunnah and HMW name nigella. A title with no Latin name has not picked a side.
What if one listing names both?
Do not cook from the title. Spice Mart says shahi jeera in the title and the buttercup family in a bullet, and it has no rating on the listing. Identify the seed in your palm. Angular means nigella despite the shahi jeera words. A crescent means the bullet named the wrong family. Then use only the method for that seed.

Related pages

Black cumin seeds buying guide

Black cumin seeds

Best black cumin seeds: which listing fits the job

Grow black cumin in the UK from a named seed packet

How to use black cumin seeds: kalonji or shahi jeera

Sources

Public UK sources named below. amazon.co.uk prices, stars and review counts on these six listings were read on 19 October 2026, with live wording checked on 20 October 2026. Page updated 21 October 2026.

  1. RHS, Nigella sativa (retrieved 20 October 2026)
  2. RHS, Bunium persicum (retrieved 20 October 2026)
  3. GOV.UK organic food labelling rules (retrieved 20 October 2026)
  4. GOV.UK approved organic control bodies (retrieved 20 October 2026)
  5. ASA, food health claims (retrieved 20 October 2026)
  6. NHS, medicines in pregnancy (retrieved 20 October 2026)
  7. BBC Food, panch phoran (retrieved 20 October 2026)
  8. Hari Ghotra, black cumin and shahi jeera (retrieved 20 October 2026)