Spanish bluebells are an easy-care spring-blooming bulb that does best in full sun (at least six hours of direct sun per day) or part shade. While they tolerate all-day shade, they don't tend to bloom as well. As the plants go dormant in early summer after they've leafed out, they're ideal for growing beneath deciduous trees like oaks and maples.

The best time to plant Spanish bluebells, like most other spring-blooming bulbs, is in early fall as soil temperatures begin to cool. These plants are not fussy about soil type, but they bloom best and spread fastest in a soil that's moist, well-drained, and rich in organic matter. Avoid soil that has a high clay content; in soggy soil they have a tendency to rot out and die over the summer.

https://www.bhg.com/gardening/plant-dictionary/bulb/spanish-bluebell/