Beginning of December, first hyacinths are ready to come out of the dark. I think they need to be out for 3 weeks before they bloom so that gives a good chance for blooms on Christmas Day.
when the bulge of the flower has grown out of the bulb, they are ready to come out of the dark
a common failure of forced hyacinths is taking them out of the dark too early, but as long as that bulge is in the stem, they are ready to come into the light, these are ready
definitely ready to come out of the dark into the light
these are more than ready - not only is the bulge of the flower grown out of the bulb but one is starting to open, I'm probably a bit late taking this bulb bowl out of the dark (Davidson uranium glass bulb bowl)
The hyacinth bulb bowls in the cellar, notice what different stages of development the hyacinths are - some are ready to come into the light, some not at all. The downside of using bulb bowls.
A few days later, I brought up one of the bulb bowls as some of the hyacinths are so ready even if all of the bulbs in a bowl are not at the same stage. Rocky cannot resist playing with the hyacinth bulbs.