You don’t need anything special, except the bulbs, along with a sturdy container to hold six or so inches of soil, small rocks, pea gravel, decorative marbles or anything else that will be heavy enough to anchor the bulbs as they grow and bloom.
Leave space of at least an inch between each large bulb, such as hyacinth, that you will be forcing. For the smaller ones, like crocus and muscari, you can bunch them together, much as they would be outdoors.
Others, such as narcissus, will bloom quickly and easily if placed in a dark, cool garage for a few weeks. So, think ahead if you’re planning a holiday centerpiece of forced bulbs.
Also, remember that crowds of forced bulbs are more dramatic. For small corms, such as crocus, plant ten or so in a 6-inch diameter container. But, when forcing larger bulbs, like tulips, insert only about three to a 6-inch pot.
Place the containers in a sunny window, turning them daily, especially when you see new shoots starting to grow. After blooms have formed, give them plenty of sunshine or several hours of strong indoor light per day. Bulbs leaning toward a light source means they aren’t getting enough of it. Water once a week or so.
Forced bulbs don’t need to be fed unless you intend to transplant them later outdoors. Feeding now won’t help the current blooms, which are being fed out of the existing bulb. But it will help the next year’s blooms. Try forcing and kinds of bulbs you like.