Forcing Hyacinths Indoors for Fragrant Winter Blooms

Hyacinths are the classic bulb for “forcing” — tricking them into flowering weeks early indoors, filling a room with scent in the depths of winter.

How forcing works

Forcing works by giving the bulb the cold spell it needs to trigger flowering, then bringing it into warmth and light to bloom ahead of its natural outdoor schedule.

Choosing bulbs to force

Look for "prepared" hyacinth bulbs, which have already had extra cold treatment at the nursery. Hyacinth 'Midnight Mystic' (buy from Thompson & Morgan →) forces well and gives deep purple-black spikes, while Hyacinth 'Berries and Cream Mixture' (buy from Thompson & Morgan →) offers a softer pink-and-cream mix if you want variety across several pots.

Step by step

Plant bulbs in bulb fibre or a bulb vase in September or October, then keep them somewhere cold and dark — a shed, garage or cold frame — for 8-10 weeks until shoots reach 3-5cm. Move them into a cool, bright room, and once buds show colour, bring them to a warmer spot for flowering.

After flowering

Forced hyacinths are usually spent for future indoor forcing but can be planted out in the garden once the risk of frost passes, where they'll recover and flower normally outdoors in following years.

For outdoor hyacinth borders that need no forcing at all, plant straight into the ground in autumn alongside spring-flowering hardy orchids like Epipactis for a longer, layered bloom season.