We send complete growing instructions with all of our bulbs. They're dipped in agricultural wax so they don't dry out. It's a challenge elsewhere, though Victorians forced it in their cool parlors.
Crown imperials are woefully under-appreciated today.
In 1629 Parkinson opened his Paradisi with them, Thomas Jefferson grew them at Monticello, and in 1830 a Long Island nursery listed 22 cultivars. Our bulbs are big and superb. To get them to return, give them sharp drainage. Variegated leaves are all the rage today, as they were in Victorian times. I was afraid 'Aureomarginata' might be 'too much,' but we all loved it here.