5 flowers to sow indoors in January for early blooms

It might be cold (freezing) outside, but garden preparations for 2026 start now – and there are actually several flowers you can sow indoors in January.

The list of things you can sow in January is longer than you’d expect, and if you’ve got a propagator (or even a heated propagator), the world’s your oyster.

‘It’s the perfect moment to get a head start on flowers, especially if you haven’t sown in autumn,’ says Jane Westoby, creative director at The Hampshire Seed Company. ‘A warm propagator, bright light, and a little restraint with the watering can are the keys to success.’