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Homes & Gardens
Homes & Gardens
Holly Crossley

What does it mean to 'harden off a plant'? Experts explain this gardening term – and why it's important

Tomato seedlings growing in individual pots of compost.

Sowing seeds indoors in early spring is a great way to get a head start. Once the weather warms up enough, you can move them into your yard – but it's not quite as simple as you might expect. Transplanting them from A to B and assuming 'job done' is generally a no-go, as it can shock and weaken your newly-sprouted flowers and veg.

Knowing how to harden off seedlings, therefore, is a key step in helping them thrive. In a nutshell, this means making the 'big move' a bit more gradual (usually over two weeks or so), to help them ease into their new surroundings.

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