Basil - How To Plant, Grow And Harvest | RHS Herbs / RHS Gardening

Once established, basil is easy to look after – just keep it warm, provide sufficient moisture and keep plants bushy and productive by harvesting the shoot tips regularly.

Watering

Water newly planted basil well until it's established, then water during dry spells to keep the soil or compost evenly moist. Plants in greenhouses and containers will need regular watering. When watering, try to avoid splashing the leaves and water in the morning if possible, as basil hates having wet roots overnight. Basil may start to flower sooner in dry conditions.

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Feeding

When growing basil in the ground, there’s usually no need for feeding, but plants in containers can run short of nutrients, so you could apply an organic-based, balanced liquid fertiliser to boost leafy growth. Avoid using potassium-rich fertilisers like tomato feed, as these encourage flowering.

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Removing flowers

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Basil 'Magic Mountain' flowers create an attractive display and are good for pollinators

Basil usually starts to flower in mid- to late summer – you can delay this and maintain leaf quality for as long as possible by removing any flower stems as soon as you spot them. It’s worth letting plants bloom eventually though, or allowing one to flower early if you have several plants, as basil flowers are rich in nectar, providing food for bees and other insects.

Propagating

Although basil is usually grown from seed (see Sowing above), it’s easy to grow new plants from softwood cuttings taken during summer. Snip off a non-flowering shoot just below a leaf, remove the lower leaves and pinch out the tip, then stand the cutting in a jar of water. It will quickly form roots and can be planted in a pot of peat-free multi-purpose compost after just a few weeks. Basil cuttings can also be rooted directly in compost.

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Tag » When To Start Basil Seeds Indoors