Check your forced bulbs, and if the shoots are 1-2in (4-5cm) long bring them into a cool, light room away from direct sunlight.
Keep them away from direct sources of heat and encourage a humid atmosphere by standing the bowls on saucers of damp gravel.
If the leaves quickly outstrip the flower buds, return them somewhere cool and dark for a day or two to slow their growth.
My bulbs aren’t quite ready to come into the light yet, and some roots have started to show above the compost, so I top-dressed with more bulb fibre, dampened the compost and returned the bulbs to the dark for a few more days.
My forced hyacinths are shooting, but need a few days longer before being brought into the light
Top dressing my hyacinth bulbs