Place the bulb somewhere cool & in low light conditions for about 10 weeks. I put mine in a frost-free greenhouse under the shelving. The bulbs must be kept frost-free.
Refresh the water weekly & keep topped up to level described in step 1.
When a strong root & bud (approx. 2”/5cms) has formed, bring the vase into a lighter (not bright sunshine) & cool place indoors. The leaves will ‘green up’ & after 3-4 days can be moved to a brighter place, for example a windowsill. If leaves begin growing too fast compared to the bud, return to a cooler position.
Keep away from temperature extremes – draughts & hot places (such as close to a radiator).
As the flower opens, move to somewhere you’ll enjoy the intoxicating fragrance. Turn the vase a little each day so they don’t lean towards the sun. A north facing windowsill is perfect. Flowers will typically last up to 2 weeks.
Different cultivars will grow at different speeds. If you want flowers for Christmas, aim to start your bulbs off by September 24th – but it isn’t an exact science.
The hyacinth bulbs are exhausted after the effort of producing a flower in water only. Transplant bulbs into the garden after flowering. They may not flower well next year but will recover to produce small blooms in future years.
Rosie Gray of Galloway Flowers. Artisan Florist & Cut Flower Farmer near Castle Douglas, in South West Scotland. Using 100% Flowers & Foliage grown in British Isles, all year round.