I bought kits with Amaryllis bulbs that included a plastic pot and coir medium for planting but I potted them in clay pots and regular potting soil. Last year I bought kits that included a tall glass vase for forcing in water and stones. Those didn't work out so well. I saved the vases and this year put paperwhite narcissus in the vases for support for long floppy stems. I happen to like tall amaryllis and I used to tie them up with raffia. When they get dry, they flop. A drink of water sometimes brings them up again. Once they have huge green tops they use a lot of water.
If planting hyacinths in soil works well this year, next year I will plant all my forcing bulbs in soil rather than water and stones. I'll trial paperwhites in soil. I haven't seen that recommended but I can see no reason why it will not work.
Here in the south, paperwhites have already begun to
bloom outside in this unseasonably warm December.
Inside, there is one bud so far.
Secrets of a Seedscatterer