Crops › Basil
How to grow Basil
in the UK
Sow April to May, plant out June, harvest July to September. About 60 days from seed to plate.
Basil's a cracking herb, proper easy to grow once you get the hang of it. It loves the warmth, so here in the North East, that means a bit of a sheltered spot on the allotment, or even a pot by the back door, you know what I mean. There’s nothing quite like fresh basil from your own plot.
Sowing
You can get your basil seeds going in April and May, like I say, it's all about warmth. Sow them shallow, just a few millimetres deep, in trays or small pots filled with good seed compost. Keep them cosy on a sunny windowsill, in a heated propagator, or in the greenhouse if you've got one, aiming for around 18-21°C. Some varieties can go straight outside in May once the soil warms up, but most of us will start them off indoors for a better head start. Thin them out a bit if they come up too thick, giving each seedling a bit of space.
Growing on
Once your little basil plants have a couple of true leaves, it's time to prick them out gently into their own small pots. They're quite tender, so don't be rushing them outside until all danger of frost has passed – that's usually mid to late May up here in the North, a bit earlier further south. Give them a few days to harden off in a cold frame or sheltered spot outside before planting them out on the plot, spaced about 20cm apart. They do proper well in containers too, so a big pot on the patio is often a good shout.
Looking after it
Basil likes regular watering, especially if it's in pots or if we're having a dry spell. Don't let it dry out completely. Pinch out the growing tips regularly, just above a set of leaves, to encourage bushier plants and stop it from flowering too early. If it starts to flower, the leaves can get a bit bitter, so keep an eye on that.
What goes wrong
To be honest, basil doesn't get too many proper diseases, but slugs are certainly partial to the tender young leaves, especially on the plot. Aphids can sometimes be a bother too, particularly if it's growing undercover in the greenhouse. Just keep an eye out and deal with them as you usually would; a quick spray of water often sorts the aphids out.
Harvest
You'll be harvesting your basil in about 60 days from sowing, usually from July right through to September. Just snip off leaves as you need them, or take whole stems, again pinching above a leaf node. The more you pick, the more it grows back, usually. If you end up with a proper glut, you can make pesto, or just freeze the leaves in ice cube trays with a bit of water or oil, or keep them in the fridge for a few days.

I've found the best basil always comes from a pot right by the back door, where it gets plenty of sun and a bit of shelter from the wind, mind.
Dates for your plot
Type the first half of your postcode and the plant-out advice shifts to your area's typical frost dates.
Varieties, and whether the club would grow them again
| Variety | Club verdict |
|---|---|
| Genovese Genovese is a classic, a proper reliable performer for your pesto and Italian dishes. Start this one indoors on a warm windowsill for the best results, you'll be chuffed. | No club votes yet |
| Sweet Basil Sweet Basil is a cracking all-rounder, known for its lovely aroma and versatile leaves. This one's happy to be sown directly outdoors once the soil has warmed up properly. | No club votes yet |
| Napoletano Napoletano gives you big, crinkly leaves, great for wrapping around mozzarella or adding to salads. Get this one started undercover in a greenhouse or cold frame for a good head start. | No club votes yet |
| Lemon Basil Lemon Basil has a lovely citrusy tang, perfect for fish dishes or a refreshing summer drink. Give it a warm spot indoors to get going, it'll thank you for it. | No club votes yet |
| Lime Basil Lime Basil offers a distinctive zesty flavour, brilliant for Asian cooking or adding a twist to your G&T. This variety can be sown straight into the ground once the weather's reliably warm. | No club votes yet |
| Thai Basil Thai Basil has a lovely aniseed flavour, a must-have for curries and stir-fries, proper authentic. Start this one undercover to give it the warmth it needs to thrive before planting out. | No club votes yet |
| Holy Basil (Tulsi) Holy Basil, or Tulsi, is well-loved for its spicy, peppery taste and is often used in herbal teas. Make sure you sow this one indoors in a warm spot to get it off to a good start. | No club votes yet |
| Cinnamon Basil Cinnamon Basil brings a unique spicy-sweet flavour, great for desserts or even a fancy cocktail. You can sow this one directly outside once the risk of frost has well and truly passed. | No club votes yet |
| Dark Opal Dark Opal is a beautiful basil with deep purple leaves and a good, strong flavour, making it a cracking edible ornamental. It does best when started undercover, where it can get a consistent warmth to germinate. | No club votes yet |
| Purple Ruffles Purple Ruffles has lovely frilly, dark purple leaves and a classic basil taste, looking proper smart in a salad. Give this one a warm start indoors to bring out its best colours and flavour. | No club votes yet |
| Italian Large Leaf Italian Large Leaf is another cracking choice for big, flavourful leaves, perfect for a proper caprese salad. This robust variety can be sown straight into a sunny spot on the plot once it's warm enough. | No club votes yet |
| Siam Queen Siam Queen is a Thai type basil with a lovely spicy aroma, fantastic for those authentic Asian dishes. Give it a sheltered start undercover, like in a greenhouse, to get it going strong. | No club votes yet |
| Emily Emily is a lovely compact basil, ideal if you're a bit short on space but still want that fresh basil taste. Get this one going indoors on a windowsill, and you'll have a cracking little plant. | No club votes yet |
| Aroma 2 Aroma 2 is a dependable basil with a good strong flavour, making it a reliable choice for any kitchen garden. This one's happy to be sown direct outdoors once the weather turns warmer. | No club votes yet |
| Prospera Prospera is known for being quite vigorous and resistant to some diseases, giving you a cracking crop of tasty leaves. Give it a warm start undercover, and it'll grow strong and healthy for you. | No club votes yet |
Votes are members rating varieties in their Seed Tin, one vote per gardener. Tap a variety for the full page and where to buy.
Buy Basil seeds
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Cook the harvest
This is pesto as it should be — made with a generous pile of fresh basil and eaten the same day. Trofie pasta catches the sauce in every twist, but the pesto itself is the thing: bright green, fragrant, and tasting unmistakably of summer. Once you have made it properly you will struggle to go back to a jar.
27 min · easyThis salad is peak August on a plate. Grilling the peaches until they caramelise brings out their sweetness and gives them a slight smokiness that cuts through the richness of the mozzarella. A deeply flavoured basil dressing — made by blending a full 40g of leaves into the oil — ties everything together and makes the dish feel genuinely complete rather than just assembled.
23 min · easyRoasting the tomatoes low and slow concentrates their sweetness and gives this soup a depth you simply cannot get from a tin. A whole pot of fresh basil is stirred through at the end, turning the soup a vivid, herby red and filling the kitchen with the smell of August. This is the soup to make when your garden is drowning in both tomatoes and basil.
80 min · easyA classical French crème brûlée given a fragrant twist by infusing the cream with fresh basil and lemon zest before setting. The result is a luxuriously silky custard with a haunting herbal perfume beneath the caramelised sugar crust — surprising at first, then completely irresistible. This is a dessert for people who think they know crème brûlée and want it to astonish them.
65 min · challengingWatch for, and grow alongside
Companions: marigolds, nasturtium
Questions people ask
When do you sow Basil in the UK?
Sow Basil from April to May. Plant out June, after the last frost.
How long does Basil take from sowing to harvest?
Roughly 60 days, with the harvest July to September.
Which Basil varieties do gardeners grow again?
Club members rate every variety they grow. This page shows the grow-again votes for Genovese, Sweet Basil, Napoletano, Lemon Basil and more.
Track your Basil from packet to plate
Sowing reminders and harvest forecasts for your own frost dates, the Seed Tin, Scan Centre for any label or packet, and the Potty Mouth Garden Club. Free to start.