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Black November at GrowTropicals
Black November at GrowTropicals
7 Day Live Arrival Guarantee Read more →
7 Day Live Arrival Guarantee Read more →



Grow your own black seed for naan, flatbreads and curries
Key benefits
This is the nigella whose seed you cook with: one sowing gives you delicate flowers in summer and a jar of your own black seed by autumn. Nigella sativa is true black cumin, known as kalonji in Indian cooking and a close relative of love-in-a-mist. It makes a slim, upright plant with fine, feathery leaves and small pale blue to white flowers, followed by swollen seed pods packed with angular black seeds. The seed has a peppery, faintly onion-like flavour; scatter it over naan, flatbreads and Turkish breads, or toast it in oil at the start of a curry.
Sowing and growing
What you receive: a packet of about 100 seeds from Piccolo Seeds, with growing instructions on the back.
Browse our full range of herb, spice and flower seeds, explore more exotic edibles, or add more plants for pollinators.
Based on your basket total, confirmed at checkout. Free delivery: Economy over £60 · Standard over £100 · Express over £150.
Every order is hand-packed and sent with tracked delivery.
Changed your mind? You can return unused items within 14 days of delivery. See our returns policy.
Your quick reference for choosing the right plant size. We group our plants by the diameter of their nursery pots which gives you a consistent way to understand scale.
Small but full of charm. These compact plants are perfect for desks, windowsills, and small shelves, or for building out a collection over time. Ideal if you enjoy watching your plants grow from the beginning. Approx. height: 10–20cm
A step up in presence, great for side tables, shelves, or styling in clusters. Easy to move around and perfect for adding greenery without taking up too much space. Approx. height: 25–35cm
Our most versatile size. Works beautifully on shelves, desks, and plant stands, offering a fuller look without dominating a space. A great balance between impact and flexibility. Approx. height: 25–50cm
More established plants with fuller foliage and stronger structure. Ideal for creating soft focal points in a room. Great for corners, beside furniture, or as standalone features. Approx. height: 40–70cm
Big, impactful plants designed for floors and open spaces. These are your statement pieces and are perfect for anchoring a room or transforming a corner with instant greenery. Approx. height: 60cm–1.3m
No, they are two species in the same genus. Love-in-a-mist (Nigella damascena) is the showier garden flower with a ruff of fine bracts, while Nigella sativa has smaller, paler flowers and is the one valued for its edible black seed, sold in shops as nigella seed or kalonji.
Pick the pods once they turn brown and papery but before they split open, then leave them in a paper bag somewhere warm and dry to finish ripening. Shake out the seeds, make sure they are completely dry and store them in an airtight jar.
Sow directly outdoors from late March to May, in a sunny spot. It dislikes being moved, so sow it where it is to grow, either in the ground or in a pot, and thin the seedlings rather than transplanting them.
Changed your mind? You can return pots, gifts, accessories and other non-plant items. Email hello@growtropicals.com with your order number within 14 days of delivery, then send the item back within 14 days of telling us. You pay the return postage.
Items must come back unused and in their original condition. If an item has been used, we may reduce your refund by the value it has lost, and for used items this can be the full price.
Live plants cannot be returned because you have changed your mind, but they are covered by our Live Arrival Guarantee.
If something arrives damaged, faulty or wrong, email us with your order number and photos and we will put it right at no cost to you. Full details are in our returns policy.
Choose your delivery speed at checkout. Express orders placed before 1pm are dispatched the same day, otherwise the next working day. Standard orders are dispatched within 2 to 3 working days and Economy orders within 4 to 5 working days. Once dispatched, every order travels by 24 hour tracked courier.
Delivery is free on orders over £60 with Economy, over £100 with Standard and over £150 with Express. Below that, the charge depends on your basket total and is always shown at checkout before you pay. The full price list is in our shipping policy.
Orders without plants are dispatched Monday to Friday. If your order also includes plants, it goes out Monday to Thursday so the plants are not left in the courier network over the weekend. Delivery can take longer at busy times such as Black Friday and Christmas.
We could not find a close match for that. Ask us directly and a real plant person will reply.
Contact us
Every order is hand-packed in protective packaging and sent with tracked delivery, so it reaches you in one piece.
Free tracked delivery on orders over £60.

Add a gift message at checkout and we will handwrite it and pack it with your order.
Pair it with a plant for a complete gift.

Changed your mind? Send unused items back within 14 days of delivery and we will refund you.
Full details in our returns policy.
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